User Manual

UNIBLITZ
VMM-D1 Shutter Driver and
VMM-T1 Shutter Driver/Timer

14-0020
Version 1.4
20021

Vincent Associates products are covered by U.S. patents.
Information in this publication supercedes that in all previously published material. Due to our ongoingdevelopment program, Vincent Associates reserves to right to discontinue or change specifications ordesigns, at any time, without incurring any obligation.
Printed in the U.S.A.
Ver. 1.4 2002
Vincent Associates, a Division of VA, Inc., 803 Linden Ave., Rochester, NY 14625
Tel: 585-385-5930 Fax: 585-385-6004
UNIBLITZ is a registered trademark of VA, Inc.

VMM-D1 & VMM-T1 User Manual

2

WARRANTY

Great care has been taken to ensure that our products are free from defectwhen shipped. Defective units will be replaced or repaired at no charge,
excepting transportation charges, if returned within one year from the date oforiginal shipment. This offer does not apply to burned out actuator coils
and/or blown fuses.
Vincent Associates will consider the return of unused equipment if returned
within 30 days from the date of shipment, subject to a 20% restocking charge.
This offer does not apply to used or damaged equipment.
This warranty extends only to the original purchaser and is not available toany third party, including any purchaser assemblies, or other products ofwhich the goods may become component equipment.

VMM-D1 & VMM-T1 User Manual3

VMM-D1 & VMM-T1 User Manual

4TABLE OF CONTENTSWARRANTY .................................................................................................................................................................. 3
GENERAL SAFETY SUMMARY ................................................................................................................................ 6
Injury Precautions .......................................................................................................................................... 6
Product Damage Precautions ......................................................................................................................... 6
Safety Terms and Symbols ............................................................................................................................. 7
PREFACE ....................................................................................................................................................................... 8
GETTING STARTED .................................................................................................................................................... 9
Features............................................................................................................................................................ 9
Introduction................................................................................................................................................... 10
Start Up.......................................................................................................................................................... 11Line Fuse Replacement................................................................................................................................. 11
Voltage Change ............................................................................................................................................. 12
Figure #1 - AC Input Module....................................................................................................................... 12
Initial Operation and Testing....................................................................................................................... 13
VMM-D1 FRONT PANEL OPERATOR CONTROLS ........................................................................................... 15
Figure #2 – VMM-D1 Front Panel Operator Controls ............................................................................. 14
Description..................................................................................................................................................... 15
Notes............................................................................................................................................................... 17
VMM-T1 FRONT PANEL OPERATOR CONTROLS ........................................................................................... 19
Figure #3 – VMM-T1 Front Panel Operator Controls.............................................................................. 18
Description..................................................................................................................................................... 19
Notes............................................................................................................................................................... 21
VMM-T1/D1 REAR PANEL OPERATOR CONTROLS ......................................................................................... 23
Figure #4 – VMM-T1 /D1 Rear Panel Operator Controls and I/O........................................................... 22
Description..................................................................................................................................................... 23
OPERATING BASICS ................................................................................................................................................. 25
Function Switches ......................................................................................................................................... 25
GATE INPUT................................................................................................................................................ 25
Figure #5 GATE Input Timing Diagram .................................................................................................... 26
Mode Selection............................................................................................................................................... 28
RS-232C Operation...................................................................................................................................... 28
Figure #6 VMM-T1 /D1 Daisy Chain Cable Configuration....................................................................... 29
RS-232 Test Program.................................................................................................................................... 30
Shutter Frequency of Operation ................................................................................................................. 32
Trigger Cautions and Trouble Shooting Tips ............................................................................................. 32
Pulse Voltage Graphs.................................................................................................................................... 33
Figure #7 Pulse Voltage vs. Exposure Time ................................................................................................ 33
Figure #8 Pulse Voltage vs. Frequency........................................................................................................ 33
Figure #9 Overall VMM-D1 Dimensions..................................................................................................... 34
Figure #10 Overall VMM-T1 Dimensions................................................................................................... 36
Maintenance .................................................................................................................................................. 37
SPECIFICATIONS....................................................................................................................................................... 37
System Characteristics.................................................................................................................................. 37
External Input Characteristics..................................................................................................................... 37
External Output Characteristics.................................................................................................................. 39
General Characteristics ................................................................................................................................ 40
INDEX ........................................................................................................................................................................... 43

VMM-D1 & VMM-T1 User Manual5General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to thisproduct or any products connected to it. To avoid potential hazards, use the product only
as specified.
Only qualified personnel should perform service procedures.

Injury Precautions•

Use proper Power Cord – To avoid fire hazard, use only the power cord supplied with this product.

•

Avoid Electric Overload – To avoid electrical shock or fire hazard, do not apply a voltage to a terminalthat is outside the range specified for that terminal.

•

Avoid Electric Shock – To avoid injury or loss of life, do not connect or disconnect line cord while it isconnected to the line voltage.

•

Ground the Product – This product is grounded through the grounding conductor of the power cord. To
avoid electrical shock, the grounding connector must be connected to earth ground. Before making
connections to the input or output terminals of the product, ensure that the product is properly grounded.
DO NOT DEFEAT THE GROUND CONNECTION ON THE SUPPLIED LINE CORD.

•

Do Not Operate Without Covers – To avoid electric shock or fire hazard, do not operate this productwith case or panels removed.

•

Use Proper Fuse – To avoid fire hazard, use only the fuse type and rating specified for this product.

•

Do Not operate in Wet/Damp Conditions – To avoid electric shock, do not operate this product in wetor damp conditions.

•

Do Not Operate in an Explosive Atmosphere – To avoid injury or fire hazard, do not operate thisproduct in an explosive atmosphere.

Product Damage Precautions•

Use Proper Power Source – Do not operate this product from a power source that applies more than thevoltage specified.

•

Provide Proper Ventilation – To prevent product overheating, provide proper ventilation.

•

Do Not Operate with Suspected Failures – If you suspect there is damage to this product, have it
inspected by qualified service personnel.

VMM-D1 & VMM-T1 User Manual

6Safety Terms and Symbols
Terms in this Manual – These terms and symbols may appear in this manual:

WARNING. Warning statements identify conditions or practices
that could result in injury or loss of life.

CAUTION. Caution statements identify conditions or practices that
could result in damage to this product or other property.

Symbols on the product – The following symbols may appear on the product.
TRIGGER LEVEL. This symbol denotes the direction of the active
signal. This specific symbol denotes active low-level logic.

VMM-D1 & VMM-T1 User Manual7

Preface
This Manual provides information for the VMM-D1 Shutter Driver and the VMM-T1
Shutter/Driver Timer. The manual contains the following chapters:• Getting Started contains a brief product description, information needed to power on thedrivers, fuse replacement and voltage change information, and a brief procedure to verify
that it functions.
• Operator Controls provide an outline of the panel control functions and locations at thefront and rear panels. This also includes the location and function of the input/output
signals.
• Operating Basics give further details to the operational features of the controllers.
• Specifications are described for all input/output levels as well as timing accuracy of the
VMM-T1, including other pertinent details and information required for the RS-232
interface.
• Index contains a full index.

Following is the complete operators manual for the UNIBLITZ VMM-T1 andVMM-D1. Please read this manual completely before operating your unit. Dueto the construction of these units, we recommend that they be returned to the
manufacturer for repair, no user serviceable parts inside.

VMM-D1 & VMM-T1 User Manual8

Getting Started
Features
The UNIBLITZ VMM-D1 and the VMM-T1 replace the D122 and T132 controllers
respectively. The VMM-D1 and the VMM-T1 contain nearly all of the features of the D122
and T132, in addition to some new features, which enhance the units’ capability in even moredemanding applications.
These new features include:•

An addressable RS-232 input. Eight units can be daisy chained together via the RS-232
input and the user can select an address for each unit at the rear panel.

•

Switching capability on all input BNC inputs to either an active high or an active low, logic
trigger level.

•

An AUX (auxiliary) output that can be toggled high to low and low to high by RS-232
commands (the VMM-D1 only).

•

An AUX (auxiliary) output that is now the DELAY timer output (the VMM-T1 only).

•

A GATE INPUT which will allow the user to select a single (or multiple) trigger signal(s)from a stream of trigger signals.

•

A LOCAL/REMOTE switch which will effectively "disconnect" all input signals from thecontroller allowing the user to manually control the shutter without the need to remove thesignals from the BNC inputs or the terminal strip - located at the front panel (the VMM-D1
only). RS-232C signals are also disabled in the LOCAL position.

•

An EXP. PRESET control, which combines the functions of the NORM/CONT switch (ofthe T132) and an exposure counter. The user can pre-select a number of exposures per
trigger signal from 1-99. By selecting the EXP. PRESET to 00, the unit will re-trigger
continuously (the VMM-T1 only).

•

A manually re-configurable AC input module. The 115/230VAC input is no longer
automatically switched (as with the D122 and T132). The user will need to manually reconfigure for 230VAC operation. This AC input module includes the AC power cord
input connector, power switch, dual .5A SB 3AG line fuses, line voltage switch over fuseholder, and line filter.

VMM-D1 & VMM-T1 User Manual9Introduction
The UNIBLITZ VMM-D1 and VMM-T1 are capable of controlling all shutter types in
the UNIBLITZ product line. The VMM-T1 incorporates two precise timers to control shutter
exposure and delay intervals. Each timer range is from .1ms to 9999sec. Four digit pushwheelswitches provide exceptional resolution for use in a multitude of shutter applications, ranging
from holography to microscopy. The VMM-D1 incorporates a state of the art shutter driver
while relying on the users input signal to determine exposure and frequency.
One feature of the VMM-T1 is the PRE or POST exposure delay. The PRE/POST
toggle switch allows the user to actuate the shutter immediately upon receipt of a trigger signal
or delay the EXPOSURE for a predetermined period. The period of the DELAY interval isdetermined from the front panel DELAY TIME SELECT. The DELAY signal is provided to
the AUX output terminal located at the rear panel of the control. In addition to the PRE/POST
DELAY, the VMM-T1 can re-trigger itself continuously to provide low level chopper control.
By selecting the EXP. PRESET pushwheel switch to “00”, once triggered, the DELAY interval
control acts as the recycle interval to determine the exposure frequency. The unit will run
continuously until reset. By selecting any value between 01-99, the shutter will trigger for thenumber of exposures selected.
One feature of the VMM-D1 is the selection of interrupt mode. With the mode switch
in the “A” position, the unit will disable itself upon an AC line loss. When power is restored,
the unit will remain disabled until reset. In the “B” position the unit will become disabled whena DC voltage level is removed from the interrupt input. When the input is restored, the unit willremain disabled until reset. The STD mode will bypass the interrupt capability. This mode
selection makes the VMM-D1 more versatile for applications where the shutter must not reopen until acted upon by the user.
Both models contain an addressable RS-232 input. By using our daisy chain cable (the910RSDC, purchased separately) multiple controllers can be connected together. Eightseparate addresses allow up to eight units to be individually controlled via one computer serial
port.
The patented driver design of the VMM-D1 and VMM-T1 allows the controller to operate all
shutter types in the UNIBLITZ product line.
A l0ft. 7-pin female to 7-pin male shutter inter-connect cable is also included with each unit
(the 710C).

VMM-D1 & VMM-T1 User Manual10Start Up
After unpacking your unit inspect for any defects. If upon inspection a problem isfound, or a part (or parts) are missing, notify Vincent Associates immediately.
After the initial inspection the unit is ready to use. To properly install and power on the
VMM-D1 or VMM-T1, perform this procedure.
1. Check that you have the proper electrical connections. The rear label, which covers the AC
input module, is there to remind you to manually configure the AC input module if the unit
requires operation at 230VAC. See “Voltage Change” instructions. THIS LABELMUST BE REMOVED PRIOR TO INSERTING THE POWER CORD INTO THE
AC INPUT CONNECTOR REGARDLESS OF WHICH AC VOLTAGE LEVEL IS
USED.
2. Check the line fuses to be sure they are the proper rating. The VMM-D1 and VMM-T1
have been shipped with the proper fuses for 115VAC operation (3AG .5A time-lag). For
230VAC operation, change line fuses to the 5mm x 20mm .25A time-lag (supplied w/unit,
packaged separately). See “Line Fuse Replacement” instructions.
3. Be sure the AC module power switch is toggled to the “0” position and the power end of
the line cord is not connected to the AC line. Then connect the opposite end of the
supplied line cord to the rear panel AC module connector. Be sure the cord is inserted
completely into the AC module connector.
4. Connect the power end of the line cord to the AC line. Power unit ON by toggling the AC
module power switch to the “1” position. Power LED indicator will illuminate.

Line Fuse Replacement
WARNING. To avoid injury or death, unplug the line cord from theline voltage power source before continuing.
1. Have handy a small flat-bladed screwdriver or similar tool and refer to Figure #1.
2. Set the VMM-D1 or VMM-T1 unit so that the rear panel is facing you.
3. BE SURE THE LINE CORD IS DISCONNECTED FROM THE LINE VOLTAGE
POWER SOURCE. Unplug the line cord from the AC module connector. You cannot
proceed with this procedure without removing the line cord from the VMM-D1/T1
control unit.
4. Using the small flat bladed screwdriver or similar tool; insert the tool into the cover door
slot; pry open cover door.
5. Using the same tool; insert the tool into the fuse holder slot; pry out the fuse holder block.
6. Remove defective fuse(s); replace with new fuse(s) and replace fuse holder into housing;close the cover door.

VMM-D1 & VMM-T1 User Manual11Voltage Change
WARNING. To avoid injury or death, unplug the line cord from theline voltage power source before continuing.
1. Repeat steps 1-5 in “Line Fuse Replacement” instructions and refer to Figure #1.
2. Rotate the fuse holder block 180°; if changing to 230VAC, replace fuses with two 5mm x
20mm .25A time-lag fuses. (Be sure to change fuses back to 3AG .5A time-lag fuses whenchanging back to 115VAC).
3. Replace fuse holder block and close the cover door. The desired voltage will be indicatedand appear in the cover door window.

Figure #1 - AC Input Module

VMM-D1 & VMM-T1 User Manual12

Initial Operation and Testing
The VMM-D1 and VMM-T1 will operate from 115VAC or 230VAC (50-60Hz), thisis manually selectable. *PLEASE BE SURE THAT THE UNIT IS PROPERLY SET UP
FOR THE LINE VOLTAGE TO BE USED.* Once the line cord has been attached to unit
and connected to properly grounded wall receptacle, the unit may be operated. *BE SURE
POWER SWITCH IS IN THE OFF POSITION BEFORE CONNECTING PLUG TO
LINE. ATTACH LINE CORD TO THE UNIT FIRST BEFORE PLUGGING INTO
THE AC POWER SOURCE.* See “Start Up” section.
Insert the seven pin male connector of shutter interconnect cable into seven pin female
receptacle at rear of unit labeled SHUTTER. Connect the seven pin female connector of shutterinterconnect cable to seven pin male connector on shutter to be driven.
Place POWER switch to the ON “1” position, the POWER LED will illuminate. Place
the N.O./N.C. switch into the N.O. position. The shutter will open and remain open until theswitch is returned to the N.C. position. The SHUTTER ACTIVE LED will illuminate when
this switch is in the N.O. position.
All UNIBLITZ drivers provide the circuitry necessary to support shutters equipped withthe solid state synchronization option. Simply plug the shutter interconnect cable into thedriver. If your shutter is equipped with this option the green LED, labeled SYNC ACTIVE,
will illuminate when the shutter is in the open position. In addition, the active low SYNC
output will change to the low state when the shutter is open. The absence of the solid statesynchronization option will only inhibit the operation of the SYNC output and SYNC ACTIVE
LED. The remainder of the VMM-D1 and VMM-T1 systems will not be affected.
See specifications and operator controls for additional operational information
concerning other systems of the VMM-D1 and VMM-T1
CAUTION
Should the shutter and/or control not respond as described previously, be sure line cord is installed into
the receptacle and connections to the shutter are made properly. Note that the shutter output is also fused (locatedat the front panel - .6A time-lag). TURN OFF THE UNIT AND REMOVE THE PLUG FROM THE AC
SOURCE BEFORE CHECKING FOR BLOWN FUSES. Be advised, a visual inspection of a fuse is usually
NOT an adequate test to determine if a fuse failure has occurred. Use a DMM (Digital Multi-Meter) or equivalenttest device to determine fuse continuity. Also, particular shutter units respond to different minimum pulse widths.
For example, a standard VS25 shutter has a minimum exposure pulse of 6ms, if the timing is set for an exposure
pulse width less than 6ms, the shutter may not open fully. If the unit still does not operate properly, please notify
Vincent Associates immediately.

VMM-D1 & VMM-T1 User Manual13

VINCENTASSOCIATESAV
Figure #2 – VMM-D1 Front Panel Operator Controls

VMM-D1 & VMM-T1 User Manual

14

VMM-D1 Front Panel Operator Controls
Description(Refer to Figure #2)
1. CONTROL Terminal block. The five position terminal block referred to on the driver (andthroughout this manual) as CONTROL provide access to several of the input and output
connections for external operation of your driver. Each terminal is explained below:a.

CONTROL #1 Output. +10VDC provided for remote switching applications or control
circuits.

b.

CONTROL #2 Pulse In. Active high input to control shutter exposure for duration of
positive pulse, or electronic or mechanical switch contact closure. Shutter will follow pulse
and frequency applied to this input. (This will operate the same as the PULSE IN BNC set
to the active high mode.)c.

CONTROL #3 GND. This convenient ground point allows user to connect input or output
signals to ground (common) the VMM-D1 circuit.

d.

CONTROL #4 Input. DC interrupt voltage. With key switch set to mode B, the interrupt
will be activated when input DC voltage (+8VDC min.) is disrupted via a switch, transistor,or similar method. This input is for DC voltage only.

e.

CONTROL #5. Output. When interrupt is activated, this normally low output is high until
reset deactivates the interrupt.

2. MODE Keyswitch. The position of the key switch sets the mode of interrupt. The interrupt
switch disables the shutter driver when a voltage interrupt is detected, either AC or DC. Upon
reset, the shutter will return to the position set by an external input or the position of the
N.O./N.C toggle switch.
a.

A (AC interrupt mode). Prevents the driver from re-opening the shutter immediately
upon power-up if the line voltage were to be interrupted. The driver remains disabled until
user supplies reset by specified means.

b.

B (DC interrupt mode). When the key switch is in Position B the driver will become
disabled when it detects that the DC input voltage at CONTROL #4 has been removed or
disrupted. When the voltage level is re-applied, the driver remains disabled until reset. The
DC input voltage is supplied (from CONTROL #1) or from an external source, determinedby the user.

c.

STD The STD mode bypasses the driver's interrupt capabilities. CONTROL #4 andCONTROL #5 become inactive. The VMM-D1 will not remain disabled after a disruption
in line voltage.

3. SYNC. ACTIVE LED indicator. Indicates status of Solid State Sync. output. The green LED
is illuminated when shutter's electronic sync. is activated. (This LED functions only if the
shutter used is equipped with the Solid State Sync. system.)
4. DRIVER ACTIVE LED indicator. This LED indicates when the internal shutter driver circuit
input has an active signal present.
5. DISABLED Indicator. Indicates that one of the two interrupt modes (mode A or mode B) has
disabled the driver. LED is off after reset, and STD operation.

VMM-D1 & VMM-T1 User Manual15

6. RESET Momentary Pushbutton Switch. Resets VMM-D1 disabled by interrupts (mode A ormode B) and returns shutter to the position determined by the N.O./ N.C., or the status of the
PULSE input. (The TRIGGER flip-flop is also reset. If the shutter had been activated by this
input the shutter will close after a reset pulse.) Please note if an open command is sent to the
RS-232 input, a reset command will not clear the RS-232 output and the shutter will not close.
You must send a close command to allow the shutter to close. If you wish to have the shutter
close (or return to the state as set by the N.O./N.C. switch) with a reset command or the
RESET switch, you must open the shutter with a trigger command.
7. LOCAL/REMOTE Toggle switch. When in the LOCAL position all inputs to the unit are
effectively "disconnected” allowing the user to manually control the shutter without the need toremove the signals from the BNC inputs or the terminal strip (located at the front panel). In the
REMOTE position, the unit will function normally. RS-232C signals are also disabled withthis switch in the LOCAL position.
8. POWER LED indicator.
9. SHUTTER FUSE. Replace with 5mm x 20mm .6A time-lag fuse. This fuse may fail if the shutter isoperated at an excessive frequency and duty cycle to protect the coil from premature failure. If theoperation of the shutter used is causing “nuisance blowing” of this fuse, please contact technicalsupport to discuss your application.
10. N.O./N.C. Toggle switch. The position of this switch determines shutter status BEFORE a trigger
signal is received by VMM-D1. In the N.C. position the shutter will be activated open by an input pulse
signal. In the N.O. position the shutter will be activated closed. The N.O./N.C switch acts to invert the
shutter operation. Any RESET command will return the shutter to the position determined by the
N.O./N.C. switch. Please note if an open command is sent to the RS-232 input, a reset command will
not clear the RS-232 output and the shutter will not close. You must send a close command to allow the
shutter to close. If you wish to have the shutter close (or return to the state as set by the N.O./N.C.
switch) with a reset command or the RESET switch, you must open the shutter with a trigger command.

VMM-D1 & VMM-T1 User Manual16NotesVMM-D1 & VMM-T1 User Manual17

VINCENTASSOCIATESAV
Figure #3 – VMM-T1 Front Panel Operator Controls

VMM-D1 & VMM-T1 User Manual18

VMM-T1 Front Panel Operator Controls
Description(Refer to Figure #3)
1. DELAY TIMER SELECT. Four pushwheel switches determine the DELAY timing range. The
total delay interval will be the product of the DELAY TIMER SELECT and DELAY
MULTIPLIER. (Each depression of the (+) key increases each digit by one, the (-) key
decreases each digit by one.)
2. DELAY LED indicator. LED indicates when DELAY timer is active.
3. EXPOSURE TIMER SELECT. Four pushwheel switches determine the EXPOSURE timing
range. The total exposure interval will be the product of the EXPOSURE TIMER SELECT and
EXPOSURE MULTIPLIER. (Each depression of the (+) key increases each digit by one, the(-) key decreases each digit by one.)
4. EXPOSURE LED indicator. LED indicates when EXPOSURE timer is active.
5. EXPOSURE MULTIPLIER switch. Clockwise rotation of the 5 position rotary switch
increases the magnitude of the EXPOSURE interval by a factor of ten.
6. EXP. PRESET SELECT. Two pushwheel switches determine the number of exposure cycles
the unit will count up to per trigger input. A setting of “00” allows the unit to run continuously
until reset. In the “00” or continuous setting, the time between exposures is determined by the
DELAY time interval.
7. SYNC. ACTIVE Indicator. LED indicates the status of the Solid State Sync. system. LED is
illuminated when the shutter's electronic sync. is active. (This LED functions only if the
shutter used is equipped with the Solid State Sync. system.)
8. DRIVER ACTIVE Indicator. LED indicates when the internal shutter driver circuit input has
an active signal present.
9. ACTUATE Switch. Depress this momentary pushbutton switch to trigger the VMM-T1
EXPOSURE and DELAY timers from the front panel.
10. RESET Switch. This momentary pushbutton switch inhibits all functions of the unit. Depress
this switch to reset both the EXPOSURE and DELAY timers, and return all outputs to their
original state. Shutter state will be returned to the status set by the N.O./N.C. switch. Please
note if an open command is sent to the RS-232 input, a reset command will not clear the RS232 output and the shutter will not close. You must send a close command to allow the shutter
to close. If you wish to have the shutter close with a reset command or this RESET switch, youmust open the shutter with a trigger command. (The shutter will either close, upon reset, or
return to the state as set by the N.O./N.C. switch.)
11. PRE/POST Toggle Switch. Position of this switch determines if DELAY interval occurs
before (PRE) or after (POST) the EXPOSURE interval. The PRE position delays the start ofthe shutter EXPOSURE interval until the end of the DELAY interval. In the POST mode the
DELAY timer is triggered at the conclusion of the EXPOSURE interval. In PRE or POST the
DELAY (AUX) output will go high for the duration of the DELAY interval when the DELAY
timer is active, (the VMM-T1 only).
12. POWER LED Indicator.

VMM-D1 & VMM-T1 User Manual1913. SHUTTER FUSE. Replace with 5mm x 20mm .6A time-lag fuse.
This fuse may fail if the shutter is operated at an excessive frequency and duty cycle to protect
the coil from premature failure. If the operation of the shutter used is causing “nuisanceblowing” of this fuse, please contact technical support to discuss your application.
14. N.O./N.C. Toggle switch. The position of this switch determines shutter status BEFORE a
trigger signal is received and indicates how the shutter will be timed, opened (N.C.) or closed(N.O.). In the N.C. position the shutter will be activated open by an input pulse signal and/or
will be opened for the desired exposure. In the N.O. position the shutter will be activatedclosed and/or will be timed in the closed position. The N.O./N.C switch acts to invert the
shutter operation. Any RESET command will return the shutter to the position determined by
the N.O./N.C. switch. Please note if an open command is sent to the RS-232 input, a reset
command will not clear the RS-232 output and the shutter will not close. You must send a close
command to allow the shutter to close. If you wish to have the shutter close (or return to thestate as set by the N.O./N.C. switch) with a reset command or the RESET switch, you must
open the shutter with a trigger command.)15. DELAY MULTIPLIER switch. Clockwise rotation of the 5 position rotary switch increases
the magnitude of the DELAY interval by a factor of ten.

VMM-D1 & VMM-T1 User Manual

20NotesVMM-D1 & VMM-T1 User Manual21Figure #4 – VMM-T1/D1 Rear Panel Operator Controls and I/O

VMM-D1 & VMM-T1 User Manual22VMM-T1/D1 Rear Panel Operator Controls
Description(Refer to Figure #4)
1. ADDRESS SELECT switch. Rotation of the 8 position octal rotary switch selects the active RS-232C
address of the unit. See “ADDRESS Select” under GENERAL CHARACTERISTICS.
2. PULSE INPUT BNC. Allows control of the shutter exposure and frequency from a TTL signal source.
The pulse duration determines the shutter exposure interval. The frequency of the signal presented to this
input determines the frequency of shutter exposures. This input can be set active high or active low by
FUNCTION switch B. See “FUNCTION Select” under GENERAL CHARACTERISTICS.
3. RS-232C DB-9 female connector. Provides access to the VMM-T1/D1 RS-232C interface allowing
the user to control input functions via a computer RS-232C serial port. See RS-232C “DB-9 female”
under EXTERNAL INPUT SPECIFICATIONS.
4. TRIGGER INPUT BNC. Allows for pulsed open/pulsed close shutter operation. Opens the shutter on
the first pulse trigger edge, closes the shutter on the next trigger edge, (VMM-D1 only). Pulse starts
EXPOSURE and DELAY interval sequence, (VMM-T1 only). This input operates in conjunction with
the GATE INPUT. When the GATE INPUT is active, the TRIGGER INPUT will be enabled. This
input can be set active high or active low by FUNCTION switch A. See “FUNCTION Select” under
GENERAL CHARACTERISTICS.
5. RESET INPUT BNC. Resets the VMM-D1 disabled by an interrupt (MODE A or MODE B) whenswitched to ground level via TTL logic or simply shorting to ground through a switch contact. TTL
logic pulse returns the shutter to the position determined by the N.O./N.C. toggle switch. When the
shutter is opened via the TRIGGER INPUT, a TTL pulse presented to the RESET input will close the
shutter, (VMM-D1 only). Inhibits VMM-T1 timing functions, both the DELAY or EXPOSURE timers
are RESET. Please note if an open command is sent to the RS-232 input, a reset command will not
clear the RS-232 output and the shutter will not close. You must send a close command to allow the
shutter to close. If you wish to have the shutter close (or return to the state as set by the N.O./N.C.
switch) with a reset command, you must open the shutter with a trigger command. This input can be set
active high or active low by FUNCTION switch C. See “FUNCTION Select” under GENERALCHARACTERISTICS.
6. GATE INPUT BNC. An active signal present at this input will enable trigger signals presented to the
TRIGGER INPUT. (An unused GATE INPUT is in the active state.) When this signal goes inactive,
the TRIGGER INPUT will disable. In this way, the user can effectively “gate” a stream of trigger
pulses and allow one or more to be received, as determined by the user, by the VMM-D1/T1.
Therefore, this input can be used to “pick” a pulse or pulses from a series of trigger pulses presented to
the TRIGGER INPUT. This input must be used in conjunction with the TRIGGER INPUT. This input
can be set active high or active low by FUNCTION switch D. See “FUNCTION Select” under
GENERAL CHARACTERISTICS.
7. SHUTTER Output 7-pin connector. 7-pin female connector to mate with 7-pin male connector of the
710C 10’ interconnect cable included with the unit. Pin out as follows:
a.
b.
c.
d.
e.
f.
g.

Pin A – Shutter Actuator Coil Drive Output
Pin B – Shutter Actuator Coil Drive Output
Pin C – Sync. Emitter Diode Output
Pin D – Circuit Ground
Pin E – Sync. Detector Transistor Input
Pin F – +5.0VDC Power Supply Output
Pin H – Shutter Ground

VMM-D1 & VMM-T1 User Manual23

8. 115 VAC 60Hz. /230 VAC 50Hz. Input module. Mates with female IEC plug on supplied line cord.
Includes the following additional functions:
a.
b.
c.
d.

Power switch – “0” is off, “1” is on.
Power fuses: ½Amp SB for 115 VAC 60Hz., ¼Amp SB for 230 VAC 50Hz. See “Line Fuse
Replacement” instructions.
Voltage change switchover block. See “Voltage Change” instructions.
3A line filter. (Internal, not user accessible)

9. AUX/GND/+5V accessory block. 3-pin pluggable terminal block connector. +5V and ground isavailable in addition to an AUX signal. The controller type determines the AUX signal function. The
VMM-T1 AUX output is now the DELAY timer output signal. An active high pulse is presented tothis output equal to the length of the DELAY timer setting. See “DELAY Out (AUX pin 1)” under
EXTERNAL OUTPUT CHARACTERISTICS. The VMM-D1 AUX output is an active low pulse
output that can be toggled TTL high and low from commands presented to the RS-232C control input.
See “RS-232 Out (AUX pin 1)” under EXTERNAL OUTPUT CHARACTERISTICS.
10. FUNCTION switches. Five sub-miniature slide switches. A-D switches are used to select the active
states of each of the four input BNC input connectors. (See “FUNCTION select” under GENERALCHARACTERISTICS.) The E switch is used to select the proper pulse energy for the shutter being
driven. Switch to the HIGH (up) position for the VS35 (35mm aperture) and the VS45 (45mm aperture)
types, switch to the LOW (down) position for all other shutter types.
11. SYNC. OUTPUT BNC. Active low output for shutters equipped with the SOLID STATESYNCHRONIZATION SYSTEM option. The shutter’s internal sync. circuit sets the BNC to a low
level when the sync. circuit becomes active. The output goes low when the shutter reaches 80% of fullopen, and goes to the high state when the shutter reaches 20% closed. The front panel SYNC. ACTIVE
LED illuminates when the sync. is active.
12. PULSE OUTPUT BNC. Active low output. The duration of this pulse is equal to the duration of the
shutter exposure pulse. This output can be used to daisy chain VMM-D1/T1 units together. A TTL
exposure pulse input to the PULSE INPUT BNC will appear at the PULSE OUTPUT BNC. The pulse
width output is equal to the duration set on the EXPOSURE timer (VMM-T1 only). Note toggling the
N.O./N.C. will not change the state of the PULSE OUTPUT.

VMM-D1 & VMM-T1 User Manual24

Operating Basics
Refer to the section describing the “Initial Operation and Testing” for initial preparation to put
your VMM-D1 or VMM-T1 into operation.

Function Switches
Located at the Rear Panel and labeled “Function” are five miniature slide switches. Switches A –D allow the user to select the active state of the four BNC inputs. When the switch actuators are
selected to the down position (a small hole will be visible just above the switch’s actuator, thisactuator could be either black or red), the corresponding BNC input will be TTL active low. This
indicates that a logic “0” (0 volts) will activate the selected input. The switches must be in this(the active low) position to activate the inputs from a remote activate cable such as the 710R
(handheld) or the 710R/F (foot activated).

By sliding any of these switch actuators to the up position (covering the small hole), theselected BNC input will become TTL active high. This indicates that a logic “1” (+5 volts) will
activate the selected input.
Switch E selects HIGH/LOW pulse energy. HIGH energy is required to operate the VS35(35mm aperture) and the VS45 (45mm aperture) shutters. When the switch is in the down
position (a small hole will be visible just above the switch’s actuator, this actuator could beeither black or red), the pulse energy is selected LOW. When the switch actuator is in the up
position (covering the small hole), the pulse energy is selected HIGH. THE HIGH ENERGYSETTING MUST BE USED FOR ONLY THE VS35 AND VS45 TYPE SHUTTERS.
USE THE LOW POSITION FOR ALL OTHER UNIBLITZ SHUTTERS. USE OF THE
HIGH POSITION FOR SHUTTER APERTURES SMALLER THAN THE VS35 AND
VS45 COULD CAUSE IRREPARABLE DAMAGE TO THE SHUTTER USED AND
WILL VOID THE SHUTTER’S LIMITED WARRANTY.

GATE INPUTThe GATE INPUT is used in conjunction with the TRIGGER INPUT. This input allows the user to“pick” one or a finite number of trigger pulses to trigger the controller from a continuous stream ofpulses presented at the TRIGGER INPUT. See Figure #5. The following description assumes the
GATE INPUT is selected active high (function switch ”D” up position) and the TRIGGER INPUT is
selected to the active low state (function switch “A” down position). When a stream of trigger pulses is
input to the TRIGGER INPUT and the GATE INPUT is in the high state (TTL logic “1”, +5V), thetrigger signals will operate the VMM-D1 and the VMM-T1 as described in the “OPERATORCONTROLS” section. Once the GATE INPUT changes to the low state (TTL logic “0”, 0V), alltrigger signals being sent to the TRIGGER INPUT are disabled. A single TTL high pulse presented to
the GATE INPUT, equal to the trigger period, will allow one trigger signal from the trigger stream to beenabled. (See Figure #5A.) If a single TTL high pulse presented to the GATE INPUT is equal to twice
the trigger period, two trigger signals from the trigger stream are enabled. (See Figure #5B.)
Therefore, the number of trigger pulses input (or GATE INPUT duration) is equal to the trigger period
times the number of exposures desired. Either the VMM-D1 or the VMM-T1 controller will utilize the
GATE input in the same manner. Note, the VMM-T1 TRIGGER INPUT triggers the internal timers;
the VMM-D1 TRIGGER INPUT opens the shutter with the first pulse presented to the input and closes
the shutter on the subsequent pulse (this input functions as the D122 PULSE O/C input).

VMM-D1 & VMM-T1 User Manual

25

TRIGGERPERIOD
TRIGGER
SIGNAL STREAM(ACTIVE LOW)

HIGH GATEPULSEGATE SIGNAL(ACTIVE HIGH)

ACTIVE HIGH PULSE WIDTHEQUAL TO TRIGGER PERIODLOW GATE PULSE

SINGLE PULSEALLOWED TO
TRIGGER UNIT

TRIGGER
PULSE(A)

TRIGGERPERIOD

TRIGGER
SIGNAL STREAM(ACTIVE LOW)

ACTIVE HIGH PULSE WIDTHEQUAL TO 2X TRIGGER PERIODLOW GATE PULSE
ACTIVE HIGH PULSE WIDTHEQUAL TO 2X TRIGGER PERIODHIGH GATEPULSEGATE SIGNAL(ACTIVE HIGH)LOW GATE PULSETWO PULSESALLOWED TO
TRIGGER UNIT

2 TRIGGERPULSES(B)

Figure #5 GATE Input Timing Diagram

VMM-D1 & VMM-T1 User Manual26Mode Selection
The VMM-D1 mode of operation can be selected with the key switch located on the front
panel. The key can be removed in any position thus preventing the switch from inadvertently
being changed while in operation. This will ensure that if an interrupt is set, the shutter will not
return to its original state until the VMM-D1unit is reset (by any of a number of methods).
In the “A” mode the unit will operate normally until loss of AC line voltage. When the ACvoltage is restored, the DISABLED LED will be illuminated and CONTROL #5 will be active
high. When reset (by any means enumerated in the SPECIFICATION section) the unit will
return to its original state. Be advised that when the key switch is switched from the STD modeto the “A” mode the unit will be disabled initially. A reset will return the controller to its
operating state.
In the “B” mode the unit will operate normally until a loss of DC voltage to the CONTROL #4
input. A complete circuit must be made from either CONTROL #1 (+10VDC) or an External
power source to the CONTROL #4 input. When the power source is removed from the
CONTROL #4 input, the unit will be disabled and the DISABLED LED will be illuminated if
and only if the input is restored. When the input voltage is restored the DISABLED LED will
be illuminated and the CONTROL #5 will be active high. When reset (by any means enumerated in the SPECIFICATION section) the unit will return to its original state. (Please note thatin this mode, a loss of AC voltage will also disable the unit, as an added safety feature.)
The shutter’s original state can be set by the N.O./N.C. switch or by an external input signal. If
the shutter has been opened by an RS-232 open command, and a “B” interrupt occurs, upon areset, the shutter’s state will be restored. Only a close command will close the shutter. If an“A” interrupt occurs, when power is restored, the RS-232 system is reset and the shutter will beclosed (this assumes a normally closed shutter type). If the shutter has been opened by the
TRIGGER INPUT or an RS-232 trigger command, and an “A” or “B” interrupt occurs, when
the unit is reset, the shutter will close. A new command will need to be input to re-open the
shutter.
In the STD mode all functions of the interrupt will be disabled and the unit will operate fromall system controls and inputs.

VMM-D1 & VMM-T1 User Manual27

RS-232C Operation
Both the VMM-D1 and the VMM-T1 inputs can be controlled via an RS-232C computer
serial signal (COM port). From your computer's RS-232C serial port connect a cable (such as
the 9l0RS cable, the 9l0RSDC cable, a null modem cable, or a user-constructed cable withconnections as enumerated in the INPUT SPECIFICATIONS) to your unit's RS-232C
interface. Connect the Tx (transmit) from the host to the Rx (receive) on the VMM-T1 or
VMM-D1 control unit. All other lines should have the same pin out (from the host) provided
the host uses a 9-Pin D-sub connector. If the host contains a 25-Pin D-sub or an 8-Pin MiniDIN, check your computer's user's manual to find the proper corresponding pin outs. In mostcases the corresponding 25-Pin D-Sub pin out and MAC 8-Pin Mini-DIN are as follows:
Function

VMM
DB-9F

IBM
DB-9M

IBM
MAC
DB-25M Mini-DIN-8F

Rx Receive Data
Tx Transmit Data
GND Signal Ground
DSR Data Set ReadyRTS Request to Send
CTS Clear to Send

Pin 2
Pin 3
Pin 5
Pin 6
Pin 7
Pin 8

Pin 2
Pin 3
Pin 5
Pin 6
Pin 7
Pin 8

Pin 3
Pin 2
Pin 7
Pin 6
Pin 4
Pin 5

Pin 5
Pin 3
Pin 4
N/C
Pin 1
Pin 2

All other pins not used. Be sure to connect the Tx pin, Pin 3 from the IBM 9-Pin D-Sub (or Pin
2 from the 25-Pin D-Sub) male connector to the Rx pin, Pin 2 of the VMM-T1 or VMM-D1 9Pin D-Sub female connector (located at the rear panel) for proper operation. Connect all otherfunctions by type as indicated above.
By sending the proper commands, the unit will respond by activating the proper function. The
program listed on page 31 will allow operation of the VMM-T1 or VMM-D1 from thecomputer keyboard.
With activation of the shutter with a trigger command through the RS-232 interface, a reset
command from the control unit's front panel, through the RESET INPUT on the rear panel, areset command through the RS-232, or a subsequent trigger command from the RS-232 willdeactivate the shutter, (VMM-D1 only). When an open command is sent to either controller,a reset command will not close the shutter. The shutter must be closed with a close command.
The VMM-T1 controller trigger command from the RS-232 is utilized to trigger the built intimers.
Up to eight VMM-D1 or VMM-T1 can be daisy chained together (connected through the same
serial port) using the 910RSDC cable. One of these daisy chain cables is required for eachcontroller in the chain. See Figure #6. Figure #6 illustrates connecting two controllers from asingle serial port. Once connected, each unit will require a unique address in the chain. This isaccomplished by adjusting the octal switch beneath the 9-Pin D-sub connector on the rear
panel to the desired command range. (See “ADDRESS Select” under GENERALCHARACTERISTICS in the SPECIFICATIONS section for a complete listing of thecommand range for each octal switch position.) The specific command range sent will decodecommands sent via the serial port. A set of “ALL” commands is also available to control allunits connected to the serial port.

VMM-D1 & VMM-T1 User Manual28

Address Select Switch

910RSDC
CablesFigure #6 VMM-T1/D1 Daisy Chain Cable Configuration

The following is a test program written to test the input commands to the RS-232 interface of the
VMM-T1 and VMM-D1 controllers. (This program and LabView programs (not listed) areavailable by contacting us via our web site (www.uniblitz.com), via e-mail(vincent@frontiernet.net), or calling (800) 828-6972.) Other programs may be available, pleasecontact technical support for further information.

VMM-D1 & VMM-T1 User Manual29RS-232 Test Program
REM PROGRAM TO SEND COMMAND PULSES TO RS232 INTERFACE, VMM-D1 AND VMM-T1.
REM WRITTEN BY STEVE PASQUARELLA, VINCENT ASSOCIATES.
REM LAST REVISION 7/29/99 BY RICHARD ST.LOUISREM COMPUTER LANGUAGE USED – Microsoft Quick Basic ver. 4.0
CLS 0
K = -1
WHILE K
OPEN "COM1:9600,N,8,1,CS0,DS0" FOR RANDOM AS #1
J = 64
C$ = "X"
MENU:

PRINT
PRINT
PRINT
PRINT "WAITING FOR KEYSTROKE COMMAND "PRINT "TYPE:"PRINT "
VMM-D1/T1"
PRINT "--------"PRINT " O - OPEN Shutter"
PRINT " C - CLOSE Shutter"
PRINT " T - TRIGGER Control"
PRINT " R - RESET Control"
PRINT " P - OPEN Aux-Out"
PRINT " L - CLOSE Aux-Out"
PRINT
PRINT " S - SET Octal Switch Address "PRINT "
(Current Starting Decimal # ="; J; ")"PRINT "
(Current Octal Address Value = "; C$; ")"PRINT
PRINT " Q - QUIT Program
"
PRINT
PRINT

START: A$ = INKEY$IF A$ = "O" OR A$ = "o" THEN
PRINT #1, CHR$(J);
PRINT "SHUTTER OPEN COMMAND SENT"GOSUB TIMEOUT
GOTO MENUELSEIF A$ = "C" OR A$ = "c" THEN
PRINT #1, CHR$(J + 1);
PRINT "SHUTTER CLOSE COMMAND SENT"GOSUB TIMEOUT
GOTO MENUELSEIF A$ = "T" OR A$ = "t" THEN
PRINT #1, CHR$(J + 2);
PRINT "CONTROL TRIGGER COMMAND SENT"GOSUB TIMEOUT
GOTO MENUELSEIF A$ = "R" OR A$ = "r" THEN
PRINT #1, CHR$(J + 3);
PRINT "CONTROL RESET COMMAND SENT"GOSUB TIMEOUT
GOTO MENUELSEIF A$ = "P" OR A$ = "p" THEN
PRINT #1, CHR$(J + 4);
PRINT "AUX OPEN COMMAND SENT"GOSUB TIMEOUT
GOTO MENUELSEIF A$ = "L" OR A$ = "l" THEN
PRINT #1, CHR$(J + 5);
PRINT "AUX CLOSE COMMAND SENT"GOSUB TIMEOUT
GOTO MENU

VMM-D1 & VMM-T1 User Manual

30

ELSEIF A$ = "Q" OR A$ = "q" THEN
K=0
PRINT "PROGRAM TERMINATED"ELSEIF A$ = "S" OR A$ = "s" THENINPUT "ENTER OCTAL ADDRESS 0 - 7 or X: ", B$
GOSUB ADDRESSGOTO MENUELSE GOTO STARTEND IFWEND
END
TIMEOUT:ADDRESS:FOR I = 1 TO 100: NEXT I
CLS 0
RETURNIF B$ = "X" OR B$ = "x" THEN
J = 64
C$ = "X"ELSEIF B$ = "0" THEN
J = 128
C$ = "0"ELSEIF B$ = "1" THEN
J = 144
C$ = "1"ELSEIF B$ = "2" THEN
J = 160
C$ = "2"ELSEIF B$ = "3" THEN
J = 176
C$ = "3"ELSEIF B$ = "4" THEN
J = 192
C$ = "4"ELSEIF B$ = "5" THEN
J = 208
C$ = "5"ELSEIF B$ = "6" THEN
J = 224
C$ = "6"ELSEIF B$ = "7" THEN
J = 240
C$ = "7"ELSE J = 64
C$ = "X"END IF
PRINT "STARTING ASCII DECIMAL # = ", J
GOSUB TIMEOUT
CLS 0
RETURNVMM-D1 & VMM-T1 User Manual31

Shutter Frequency of Operation
The repeat exposure specification as listed in this manual is specified at 35ms. This is an
optimum value to ensure enough pulse energy to open any UNIBLITZ shutter. However the
VMM-T1 or VMM-D1 is capable of operating each Vincent shutter to its maximum frequency
with a slight sacrifice in shutter opening speed. This is due to the drive circuit, which allows
the pulse voltage to drop with an increase in frequency to compensate for the heat that isdeveloped in the shutter coil. (See graphs Figure #7 and 8) Please contact the factory forspecific information concerning shutter modifications and/or drive modifications that may benecessary for operating shutters at their maximum frequency. Please note also that fuseblowing problems, specifically shutter fuses, may be due to high frequency operation without
proper fuse selection. Due to the large number of different frequencies and duty cycles that the
shutter is used with, please contact the factory for further details regarding specific fuseselection.

Trigger Cautions and Trouble Shooting Tips
1. The VMM-T1 or VMM-D1 system's capability can be greatly enhanced by external control as
described previously, however, extreme care must be taken to ensure that high voltages (seeSPECIFICATIONS) are not inadvertently switched into external control inputs. Also, note thatlarge negative voltages can cause irreparable damage to the unit's internal circuitry. Exercise
extreme caution.
2. As noted previously, a visual inspection of a fuse is usually NOT an adequate test to determine
if a fuse failure has occurred. Use a DMM (Digital Multi-Meter) or equivalent test device todetermine fuse continuity.
3. Particular shutter units respond to different minimum pulse widths. For example, a standard
VS25 shutter (with Teflon shutter blades) has a minimum exposure pulse of 6ms, if the timingor pulse width presented is set for an exposure pulse width less than 6ms, the shutter may notopen fully. If the unit still does not operate properly, when using the proper pulse width, please
notify Vincent Associates immediately.
4. If you are not using a Vincent 910RS or 910RSDC RS-232 interface cable, please note, astandard RS-232 cable will not work with these controls. You must use a “NULL MODEM”
type interface cable.
5. When you receive your controller and shutter, the shutter may be shipped with a small circularwhite plastic protective ring around the shutter’s male connector contacts. This ring protects
the male connector’s contacts during shipping. This ring is held on by friction and must be
removed prior to attaching the female end of the 710C cable to the shutter. This ring can beremoved by gently pulling up off the top of the connector. Tools are not required to remove
this ring.

VMM-D1 & VMM-T1 User Manual32

Pulse Voltage Graphs
Pulse Voltage vs. Exposure Time at Select Frequencies
70.0

5 Hz.
10 Hz.

60.0

Pulse Voltage

50.0

40.0

30.0
40 Hz.

15 Hz.

20 Hz.

25 Hz.
30 Hz.
35 Hz.

20.0

10.0

0.0
0

5.0

8.0

10.0

13.0

15.0

18.0

20.0

23.0

25.0

28.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

Exposure Time (msec.)

Figure #7 Pulse Voltage vs. Exposure Time
Pulse Voltage vs. Frequency at Select Exposure Time
70.0

1 msec.
60.0

5 msec.

Pulse Voltage

50.0

40.0

30.0

30
msec.

40
msce.

35
msec.

20.0

20
msec.
25
msce.

15
msec.

10
msec.

10.0

0.0
0

5.0

8.0

10.0

13.3

15.0

17.2

20.0

22.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

Frequency

Figure #8 Pulse Voltage vs. Frequency

VMM-D1 & VMM-T1 User Manual

33

3

4
6

Figure #9 Overall VMM-D1 Dimensions

VMM-D1 & VMM-T1 User Manual

34


















R

3

4
6

Figure #10 Overall VMM-T1 Dimensions

VMM-D1 & VMM-T1 User Manual35

MaintenanceAlthough the stability of the timing and drive voltage is assured and calibrated prior to
shipment, it may become necessary to make some minor adjustments to the operating systemsof the VMM-T1 or VMM-D1 over time.
It is highly recommended that if you suspect a problem with your unit that it is returnedto the factory for proper adjustments and calibration. The unit's complicated circuitry
will be damaged and/or not function as specified if inadvertently adjusted improperly.
Proper care and maintenance of the unit should be taken as with any electronic instrument.

VMM-D1 & VMM-T1 User Manual36Specifications
System Characteristics
VMM-D1 VMM-T1

*

Name

Description*

Exposure Interval

0.1 mS (100 µS) to 9999 Sec (2.8 hrs) in five decade
ranges variable within each decade with 4-digit pushwheelswitches.

*

Delay Interval

0.1 mS (100 µS) to 9999 Sec (2.8 hrs) in five decade
ranges variable within each decade with 4-digit pushwheelswitches.

*

Repeat Exposure

01 to 99 exposures variable or continuous (00) selectablewith EXP PRESET 2-digit pushwheel switches; 35 mS
minimum between exposures (100 mS minimum for VS35,
VS45 shutters).

*

Accuracy

Exposure and Delay ± 0.5% all ranges (crystal timebase); maximum 20 µS propagation delay fromapplication of trigger to pulse applied to driver; Typical 5 7 µS delay.

*

Shutter Drive

Continuously variable frequency of exposures from DC to
the shutter's maximum rate; maximum peak pulse power
400 W, pulse voltage 70 VDC, pulse current 5.7 A (testconditions: VS35 shutter, standard 5 Volt, 12 ohm coilcycled with 20 mS exposure at 5 Hz).

External Input Characteristics
VMM-D1 VMM-T1

Name

Description**

TRIGGER INPUT (BNC)

Input impedance 50K ohms; source current 100 µA;
active-low or active-high selectable with FUNCTION slideswitch A; minimum pulse width required to ensure
triggering 100 µS; TTL compatible: minimum high-level+2.0 VDC, maximum low-level +0.8 VDC.

**RESET INPUT (BNC)

Input impedance 50K ohms; source current 100 µA;
active-low or active-high selectable with FUNCTION slideswitch C; minimum pulse width required to ensure reset
100 µs (5 mS for VMM-D1 mode A, B); TTL compatible:
minimum high-level +2.0 VDC, maximum low-level +0.8
VDC.

VMM-D1 & VMM-T1 User Manual37External Input Characteristics (cont.)
VMM-D1 VMM-T1 Name

Description**

GATE INPUT (BNC)

Input impedance 50K ohms; source current 100 µA; activelow or active-high selectable with FUNCTION slide-switch D;
minimum pulse width determined by period of signal applied
to Trigger Input; maximum pulse width determined bymultiple of trigger signal period; TTL compatible: minimum
high-level +2.0 VDC, maximum low-level +0.8 VDC.

**PULSE INPUT (BNC)

Input impedance 50K ohms; source current 100 µA; activelow or active-high selectable with FUNCTION slide-switch B;
minimum pulse width determined by applicable shutter;maximum pulse width unlimited; TTL compatible: minimum
high-level +2.0 VDC,
maximum low-level +0.8 VDC.

*

Pulse In (CONTROL Pin 2)

Input impedance 50K ohms; active-high only; minimum
pulse width determined by applicable shutter; maximum
pulse width unlimited; TTL compatible: minimum high-level+2.0 VDC, maximum low-level +0.8 VDC (located on front
panel).

*

Interrupt In (CONTROL Pin
4)

Input impedance 470 ohms; active-high only; minimum
input voltage required to activate interlock +8.0 VDC. +10
volt DC output of CONTROL Pin 1 can be used as supply
voltage for this input. (located on front panel).

*

RS-232C (DB-9 female)

Baud rate 9600, 8 Data bits, 1 Stop bit, No parity, No flow
control, command acquisition time 0.94 msec; 6 commands
available; 1 global, 8 local address locations for commands(see "ADDRESS Select" specification for switch settings oflocal address locations). Also see page 31 for QUICKBASIC test program.

*
*
*
*

RS232
Commands
Open
Close
Trigger
Reset
Open B
Close B

Global Address Codes
Decimal HEX Octal
Binary
ASCII
64
40
100
01000000 @
65
41
101
01000001 A
66
42
102
01000010 B
67
43
103
01000011 C
68
44
104
01000100 D (sets AUX Pin-1 low)
69
45
105
01000101 E (returns AUX Pin-1 high)

GND (CONTROL Pin 3)

0 VDC ground reference provided for CONTROL input pins
(located on front panel).

*

*
*
*
*
*
*

*

VMM-D1 & VMM-T1 User Manual38External Output Characteristics
VMM-D1 VMM-T1 Name

Description**

PULSE OUTPUT (BNC)

Active low; source impedance 1K ohms; maximum
source current 5 mA; maximum sink current 100 mA;
maximum (low-level) output voltage 0.5 VDC. Duration
time determined by width of active pulse applied to
PULSE Input or Exposure Time setting of VMM-T1.

**

SYNC. OUTPUT (BNC)

Active low; source impedance 1K ohms; maximum
source current 6.8 mA; maximum sink current 25 mA;
maximum (low-level) output voltage 0.5 VDC. This
output provided for shutters equipped with theElectronic Sync. option.

*

Delay Out (AUX Pin 1)

Active high; source impedance 1K ohms; maximum
source current 5 mA; maximum sink current 100 mA;
maximum (high-level) output voltage +5 VDC. Duration
time determined by Delay Time setting. (Delay interval
can be set before exposure or after with PRE/POST
toggle switch.)*

RS232 Out (AUX)

Active low; source impedance 1K ohms; maximum
source current 5 mA; maximum sink current 100 mA;
maximum (low-level) output voltage 0.5 VDC;
Activated by RS-232C commands "Open B" and "Close
B"*

Interrupt Out (CONTROL Pin 5)

Active high; source impedance 1.3K ohms; maximum
source current 7.2 mA; maximum sink current 25 mA.
This output goes high whenever DISABLED LED
illuminates.

*+10VDC (CONTROL Pin 1)

10 volt DC unregulated output provided for use inremote switching and/or control circuits (located on
front panel).

**+5V (AUX Pin 3)

5 volt DC regulated output provided for use in remoteswitching and/or control circuits (located on rear panel).

**

GND (AUX Pin 2)

0 VDC ground reference provided for AUX output pins
(located on rear panel).

GND (CONTROL Pin 3)

0 VDC ground reference provided for CONTROL output
pins (located on front panel).

*

VMM-D1 & VMM-T1 User Manual39General Characteristics
VMM-D1

VMM-T1

Name

Description
Red 3mm LED indicates when power is available.

**

POWER Indicator**

DRIVER ACTIVE Indicator Red 3mm LED indicates when the shutter driver circuit isactive. This LED will illuminate with or without the load of a
shutter's actuator coil.

**

SYNC. ACTIVE Indicator

Green 3mm LED indicates when a shutter's Electronic
Sync. circuit is active. SYNC. OUTPUT will be low only
when this LED is on. Indicator will only operate if the
shutter used is equipped with the solid-state sync. contact.

DISABLED Indicator

Red 3mm LED indicates when interruption of AC (Mode A)
or DC (Mode B) voltage is detected. Shutter driver will bedisabled and Interlock Out will be set high when this LED ison.

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EXPOSURE Indicator

Green 3mm LED indicates when EXPOSURE time base isactive.

*DELAY Indicator

Green 3mm LED indicates when DELAY time base isactive.

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ADDRESS SelectAllows selection of individual (local) address locations ofcommands sent by a PC's serial port.

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RS232
Commands
Open
Close
Trigger
Reset
Open B
Close BVMM-D1 & VMM-T1 User Manual

ADDRESS Switch Positions (x = don't care or global)
x
0
1
2
3
4
5
6
7
64 128 144 160 176 192 208 224 240 (Decimal)
65 129 145 161 177 193 209 225 241 (Decimal)
66 130 146 162 178 194 210 226 242 (Decimal)
67 131 147 163 179 195 211 227 243 (Decimal)
68 132 148 164 180 196 212 228 244 (Decimal)
69 133 149 165 181 197 213 229 245 (Decimal)40

VMM-D1*

VMM-T1*

General Characteristics (cont.)
Name
Description
FUNCTION SelectFunction
TRIGGER INPUTPULSE INPUTRESET INPUTGATE INPUT
Pulse Energy

Slide-switches A, B, C and D allow selection of active-low or
active-high states for the four BNC inputs; slide-switch E
allows the selection of additional pulse energy for the VS35
or VS45 shutter.
(These 5 switches located on rear panel)
SlideSwitch
A
B
C
D
E

Position
Lower
active-low
active-low
active-low
active-low
VS25 (or smaller
aperture size)

Upperactive-highactive-highactive-highactive-high
VS35 and VS45 only

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Power Requirements

115 VAC ±10%, 60 Hz or 230 VAC ±10%, 50 Hz. Selectedmanually by rotating the fuse holder of the AC power input
module. See "Voltage Change" instructions.

**

Fuse Requirements

two ½ Amp slow blow (¼ x 1¼") for 115 VAC line
two ¼ Amp slow blow (¼ x 1¼") for 230 VAC line
one 0.6 Amp slow blow (5 x 20mm) for Shutter actuator coil
See "Fuse Change" instructions for AC power fuse change.

**

Operating Temperature

0° C to 50° C (32° F to 122° F)**

Size (HWD)

2.638" x 5.354" x 8.186" (67.0 x 136.0 x 207.9 mm)

Weight3.38 lbs (1.53 kg)
3.50 lbs (1.59 kg)**

VMM-D1 & VMM-T1 User Manual41General Characteristics (cont.)
VMM-D1

VMM-T1

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Name

Description

Accessories (supplied)

710C shutter interconnect cableAC line cord
230 VAC line fuses, two ¼ Amp slow blow fuses (¼ x 1¼")
Users Manual
Mode control keys – 2 each

Optional Accessories

710R remote hand-held trigger cable (used with active-low
BNC)
710R/F remote foot-switch trigger cable (used with activelow BNC)
910RS RS-232C interconnect cable
910RSDC RS-232C interconnect cable for daisy chain
application. (One required per unit in the chain.)

VMM-D1 & VMM-T1 User Manual42Index+10V, 15, 27, 40+5V, 24, 25, 41
115 VAC, 43
115 VAC 60Hz. /230 VAC 50Hz, 24
230 VAC, 43
25-Pin D-sub, 28
710C, 44
710R, 25, 44
910RS, 32, 44
910RSDC, 10, 28, 44
9-Pin D-sub, 28

A
AC input module, 9, 11
AC Input Module, 12
accessory block, 24
accuracy, 8
Accuracy, 37
ACTUATE Switch, 19
ADDRESS Select, 41
addressable, 9, 10
AUX, 9, 39, 40
AUX output, 10, 24, 41

DELAY MULTIPLIER, 20
Delay Out, 40
DELAY TIMER SELECT, 19
DISABLED Indicator, 16, 41
DRIVER ACTIVE LED, 15

E
EXP. PRESET, 9, 10
EXP. PRESET SELECT, 19
exposure interval, 19, 23
Exposure Interval, 37
EXPOSURE interval, 20
EXPOSURE LED, 19
EXPOSURE MULTIPLIER, 19
EXPOSURE TIMER SELECT, 19

F
Function Switches, 25

FUNCTION switches, 24
fuse, 8, 11, 24, 32
Fuse, 6, 11, 43
FUSE, 16, 20

G

B
Baud rate, 39
BLOWN FUSES, 13
BNC, 9, 15, 16, 23, 24, 25, 37, 38, 39,
40, 43, 44

GATE INPUT, 5, 9, 23, 25, 39
GND, 15, 24, 28, 39, 41
Graphs, 33
ground, 13, 15, 23, 24, 39, 41
Ground, 6, 24, 28

CCaution, 32
CAUTION, 13
Close, 42
Close B, 39, 40, 42
close command, 16, 19, 20, 23, 27, 28
CLOSE COMMAND, 30
COM port, 28
CONTROL, 15

Ddaisy chain, 9, 10, 24, 28, 44
Daisy Chain, 29
DB-25, 28
DB-9, 23, 28, 39
delay, 10
Delay, 37
DELAY, 9, 19, 20, 23, 24
delay interval, 10, 19
Delay interval, 40
Delay Interval, 37
DELAY interval, 20
DELAY LED, 19

VMM-D1 & VMM-T1 User ManualLED, 11, 13, 15, 16, 19
line fuse, 9, 11, 44
Line Fuse, 11, 24
Line Fuse Replacement, 11
LOCAL/REMOTE, 9, 16

M
MAC 8-Pin Mini-DIN, 28
Maintenance, 36
minimum exposure, 13, 32
mode A, 16, 38
Mode A, 41
MODE A, 23
mode B, 15, 16Mode B, 41
MODE B, 23
mode selection, 10
Mode Selection, 27

N
N.O./N.C. switch, 13, 16, 19, 20, 27
Notes, 17, 21

O

HOpen B, 39, 40, 42
open command, 16, 19, 20, 23, 27, 28
Operating Basics, 8, 25

I

P

HIGH/LOW, 25

initial inspection, 11
Initial Operation, 13
interrupt in, 10Interrupt In, 39
Interrupt Out, 40
Introduction, 10

K
key, 19
key switch, 15, 27
keyboard, 28
Keyswitch, 15Lparity, 39
POWER Indicator, 41
Power LED, 11
POWER LED, 13, 16, 20
Power Requirements, 43Power Supply, 24
PRE/POST Switch, 20
pulse energy, 24, 25, 32, 43
pulse in, 24
Pulse In, 15, 39
PULSE in, 16
PULSE In, 40

43P (cont.)
PULSE IN, 23, 39
PULSE INPUT, 24
pulse out, 24
PULSE OUT, 24, 40
PULSE OUTPUT, 24
Pulse Voltage Graphs, 33

Rremote, 25, 40, 44
REMOTE, 16
repeat exposure, 32
Repeat Exposure, 37
reset, 10, 15, 16, 19, 20, 23, 27, 28, 38
Reset, 39, 42
RESET, 16, 19, 23, 38, 43
reset command, 16, 19
RESET command, 20
RESET INPUT, 28
RESET switch, 16, 19, 20
RS-232 Test Program, 30

VMM-D1 & VMM-T1 User Manual

RS-232C, 5, 9, 16, 23, 24, 28, 39, 40,
44
RS-232C Operation, 28

Sserial port, 10, 23, 28, 41
Shutter, 1, 5, 8, 15, 19, 23, 24, 30, 32,
37, 41, 43
shutter drive, 10, 15, 19, 41
Shutter Drive, 8
Shutter Frequency of Operation, 32
shutter fuse, 32
SHUTTER FUSE, 16, 20
Size, 43
Start Up, 11
STD, 10, 15, 27
Stop bit, 39
SYNC ACTIVE, 13
Sync., 24
SYNC., 15, 19, 24, 40, 41
SYNC. ACTIVE Indicator, 19, 41
Sync. output, 15
SYNC. OUTPUT, 41

T
Trigger Caution, 32
trigger command, 16, 19, 20, 23, 27, 28
trigger input, 19
Trouble Shooting Tips, 32

V
VMM-D1, 1, 5, 8, 9, 10, 11, 13, 14, 15,
16, 23, 24, 25, 27, 28, 29, 30, 32, 36,
37, 38, 39, 40, 41, 43, 44
VMM-T1, 1, 5, 8, 9, 10, 11, 13, 18, 19,
20, 22, 23, 24, 25, 28, 29, 30, 32, 36,
37, 39, 40, 41, 43, 44
Voltage Change, 12W
WARRANTY, 3, 5, 25

44