PHOTO BEAM UNITPBU-2000Thank you for purchasing SEIKO Photo Beam Unit PBU-2000.
Before using your SEIKO Photo Beam Unit, please read this manual
carefully for its proper use and care.
Keep this manual handy for ready reference.

CAUTION（1）This manual may not be copied or reproduced in any form, in whole or in part,without the express written consent of SEIKO.
（2）This manual may be subject to change without prior notice.
（3）This manual has been prepared carefully to provide you with complete information
for the operation of this product. For the purpose of constant improvement in thismanual, your suggestions and comments on the descriptions included herein arehighly appreciated.
（4）SEIKO shall not be liable for any failure of this product or direct or indirect damages
resulting from such failure if such failure is caused due to abuse or misuse of the
product, failure to observe instructions herein or neglect of other reasonable care, orservicing, changes, modifications or alterations performed by other than SEIKO or aservicing contractor authorized by SEIKO.

SAFETY ALERT SYMBOLSThe following symbols and terms used in this manual have the meaning as explained below.
They are intended to attract special attention of the users to the descriptions attached withthem so that they can use the product properly to prevent personal injuries and property
damages. Before reading this manual, be sure to understand what they mean.
This pictorial symbol with WARNING is used to indicate a

WARNINGpotentially hazardous situation which is likely to cause
death or severe personal injury if the instructions attachedwith them are not followed correctly.
This pictorial symbol with CAUTION is used to indicate a

CAUTIONpotentially hazardous situation which is likely to cause
personal injury or property damage if the instructions underattached with them are not followed correctly.

This pictorial symbol indicates what must NOT be done.

This pictorial symbol indicates what must be done.

ー TABLE OF CONTENTS －1

SAFETY PRECAUTIONS ............................................................................. 1

2

INTRODUCTION ....................................................................................... 4

3

4

5

6

7

2.1

Overview .............................................................................................................4

2.2

System Configuration ............................................................................................4NAMES AND FUNCTIONS OF PARTS ........................................................... 5
3.1

Photo Beam Transmitter PBU-2000TX......................................................................5

3.2

Photo Beam Receiver PBU-2000RX..........................................................................7

PHOTO BEAM RECEIVER SETTING ........................................................... 10
4.1

Contact Signal Output Time .................................................................................. 10

4.2

Masking Time ..................................................................................................... 10

4.3

Status Data Output Interval.................................................................................. 11

4.4

Status Data Output Baud Rate .............................................................................. 11

INFORMATION ON LED DISPLAY.............................................................. 12
5.1

Initial Display ..................................................................................................... 12

5.2

Display during Operation...................................................................................... 12

STATUS DATA OUTPUT ........................................................................... 13
6.1

Communication Specifications............................................................................... 13

6.2

Data Format ...................................................................................................... 13

SPECIFICATIONS .................................................................................... 14
7.1

Photo Beam Transmitter PBU-2000TX.................................................................... 14

7.2

Photo Beam Receiver PBU-2000RX........................................................................ 15

1 SAFETY PRECAUTIONS
The following precautions must be strictly observed for the safety of yourself and your fellow
workers and for the protection of property from loss and damages.
If the Product is giving out smoke or burnt smell, or

WARNINGshowing other abnormal symptoms, stop using it.
Then, checking that no more smoke is given out, callyour nearby SEIKO dealer or agent for repair service.
Unless you are a qualified electrician, never try todisassemble,

repairormodifythe

Product.

Unauthorized disassembly, repair or modification may
cause an electric shock or fire.
Do not let any foreign matter such as pin and a pieceof metal enter into the inside of the Product. In casethis has occurred, stop using it. If the Product is used
continuously without being reconditioned, an electric
shock or fire may result. Call your nearby SEIKO
dealer or agent for repair.
Never operate the Product with wet hands. An electric
shock or malfunction may result.
Do not expose the Product to splashes of water. An
electric shock, malfunction or fire may result.
Do not direct the Product toward the sun. An excessive
heat generation, malfunction or fire may result.
Do not use or keep the Product at following places, as
this may cause an electric shock, malfunction or fire:・Places under extremely high temperatures (such as
those exposed to direct sunlight);
・Dusty places;
・Places exposed to frequent vibrations; and・Places subject to static electricity.

-1-

CAUTION

Do not drop the Product, or hit it strongly against
hard objects. A malfunction or injury may result.
When connecting the Product with any optional orother device, check that the connection is performed
properly and securely. A malfunction or failure may
result.
Install the batteries properly, checking that their (+)
and (-) terminals are properly aligned. A malfunction
or failure may result.
Do not use batteries of different types together.
Otherwise, heat generation or electrolyte leakage ofthe batteries may result and cause damage to the
Product.
Do

not

use

old

and

new

batteries

together.

Otherwise, heat generation or electrolyte leakage ofthe batteries may result and cause damage to the
Product.
Use only batteries of the same make, type and size.
Otherwise, heat generation or electrolyte leakage ofthe batteries may result and cause damage to the
Product.
Use

thebatteries

only

withintheir

specifiedoperational temperature range. Otherwise, they may
not perform as specified, and a malfunction of the
Product may result.
If you decide not to use the Product for a long time,
take out the batteries. Otherwise, heat generation orelectrolyte leakage of the batteries may result andcause damage to the Product.
To power the photo beam unit with an external battery,be sure to connect it with a battery with a voltage of DC
11 to 14 V. Otherwise, a malfunction, fire or injury may
result.

-2-

Do not expose the case of the Product to solvents
such as alcohol and gasoline, spray of cosmetics or

CAUTION

the like, cleaners, adhesives, or paints.

They may

discolor, deteriorate or damage the case due tochemical change.

-3-2 INTRODUCTION
2.1 Overview
The SEIKO Photo Beam Unit PBU-2000 detects the passing of a person or an object
through the light it projects.
PBU-2000 is composed of a Photo Beam Transmitter PBU-2000TX and a Photo Beam
Receiver PBU-2000RX. The Transmitter projects light, and the Receiver receives it. When aperson or an object passes between them, the Receiver detects the interception of the light,
and outputs a contact signal.

2.2 System Configuration① Photo Beam Transmitter PBU-2000TX

1 unit② Photo Beam Receiver PBU-2000RX

1 unit③ Operating Manual (this booklet)※ The batteries to be used with PBU-2000 are not included with it, and need to bepurchased separately.
Transmitter and Receiver use four batteries each, and a total of eight batteries are
required.

-4-3 NAMES AND FUNCTIONS OF PARTS
3.1 Photo Beam Transmitter PBU-2000TX
⑤
④
③
②

①
⑥

① Battery cover / battery holder
Turn the knurled screw to open the battery cover, and insert four LR6 (AA) alkaline drybatteries or HR06 (AA) Ni-MH rechargeable batteries into the battery holder, checking that
their (+) and (-) terminals are properly set.
Install the batteries properly, checking that their (+)

CAUTIONand (-) terminals are properly aligned. A malfunction
or failure may result.
Do not use batteries of different types together.
Otherwise, heat generation or electrolyte leakage ofthe batteries may result and cause damage to the
Product.
Do

not

use

old

and

new

batteries

together.

Otherwise, heat generation or electrolyte leakage ofthe batteries may result and cause damage to the
Product.
Use only batteries of the same make, type and size.
Otherwise, heat generation or electrolyte leakage ofthe batteries may result and cause damage to the
Product.

-5-

Use

CAUTIONthebatteries

only

withintheir

specifiedoperational temperature range. Otherwise, they may
not perform as specified, and a malfunction of the
Product may result.

② External connection connector
It is a connector for connecting an external battery.
※ If an external battery is connected while dry or rechargeable batteries are inserted,
PBU-2000TX is powered by the external battery on a priority basis.
To power the photo beam unit with an external battery,

CAUTIONbe sure to connect it with a battery with a voltage of DC
11 to 14 V. Otherwise, a malfunction, fire or injury may
result.

③ Power switch
It is a switch to turn on PBU-2000TX.
④ Power reserve indicator LED
It indicates the status of the power reserve of the alkaline dry batteries or Ni-MH
rechargeable batteries.
LED indicator

Power reserve status

LightedSufficient power reserve remains.

Flashing

Power reserve nears its end. Replace the batteries with new ones.

Unlighted

Power reserve has been depleted. Replace the batteries with new ones
immediately.

※ When an external battery is used, the power reserve indicator LED does notindicate the status of the power reserve accurately.
⑤ Light projection surface
It is a surface from which the light is projected. When installing the Transmitter, make surethat this surface is directed toward the Photo Beam Receiver PBU-2000RX.
⑥ Screw hole for fixing PBU-2000TX on a pan head of a tripod
To mount PBU-2000TX on a pan head of a tripod or the like, use this screw hole to fix it.

-6-

3.2 Photo Beam Receiver PBU-2000RX
⑧

⑦

⑥
④
③
②

⑤
⑨

①

① Battery cover / battery holder
Turn the knurled screw to open the battery cover, and insert four LR6 (AA) alkaline drybatteries or HR06 (AA) Ni-MH rechargeable batteries into the battery holder, checking that
their (+) and (-) terminals are properly set.
Install the batteries properly, checking that their (+)

CAUTIONand (-) terminals are properly aligned. A malfunction
or failure may result.
Do not use batteries of different types together.
Otherwise, heat generation or electrolyte leakage ofthe batteries may result and cause damage to the
Product.
Do

not

use

old

and

new

batteries

together.

Otherwise, heat generation or electrolyte leakage ofthe batteries may result and cause damage to the
Product.
Use only batteries of the same make, type and size.
Otherwise, heat generation or electrolyte leakage ofthe batteries may result and cause damage to the
Product.

-7-

Use

CAUTIONthebatteries

only

withintheir

specifiedoperational temperature range. Otherwise, they may
not perform as specified, and a malfunction of the
Product may result.

② External connection connector
It is a connector for battery input, contact signal output and status data output.
※ If an external battery is connected while dry or rechargeable batteries are inserted,
PBU-2000RX is powered by the external battery on a priority basis.
To power the photo beam unit with an external battery,

CAUTIONbe sure to connect it with a battery with a voltage of DC
11 to 14 V. Otherwise, a malfunction, fire or injury may
result.

③ Power switch
It is a switch to turn on PBU-2000RX.
④ Power reserve indicator LED
It indicates the status of the power reserve of the alkaline dry batteries or Ni-MH
rechargeable batteries.
LED indicator

Power reserve status

LightedSufficient power reserve remains.

Flashing

Power reserve nears its end. Replace the batteries with new ones.

Unlighted

Power reserve has been depleted. Replace the batteries with new ones
immediately.

※ When an external battery is used, the power reserve indicator LED does notindicate the status of the power reserve accurately.
⑤ DIP switch
It is a switch for setting contact signal output time, masking time, status data output
interval, and status data output baud rate.
※ For details, see "4 PHOTO BEAM RECEIVER SETTING" on P. 10⑥ LED display
It displays various information including light reception level.
※ For the details of the displayed information, see "5 INFORMATION ON LEDDISPLAY" on P. 12-8-

⑦ Light reception surface
It is a surface to receive the light. When installing the Receiver, make sure that this surface
is directed toward the Photo Beam Transmitter PBU-2000TX.
⑧ Light reception monitor LED
It lights up when the light projected from the Transmitter is received on the light reception
surface.
⑨ Screw hole for fixing PBU-2000RX on a pan head of a tripod
To mount PBU-2000RX on a pan head of a tripod or the like, use this screw hole to fix it.

-9-

4 PHOTO BEAM RECEIVER SETTING
Use the DIP switch of the Photo Beam Receiver PBU-2000RX to set contact signal output time,masking time, status data output interval, and status data output baud rate.
※ When changing the existing settings, be sure to turn OFF the power. While the poweris turned ON, operating the DIP switch will not change the settings.
※ Before turning ON the power, be sure to check that the DIP switch is set properly.

4.1 Contact Signal Output Time
Set the output time of a contact signal which is output when the Receiver detects thepassing of a person or an object.
Switch No.

Contact signal output time

1

２

OFF

OFF

15 milliseconds

ON

OFF

45 milliseconds (default setting)

OFF

ON

45 milliseconds (reserved)

ONON

45 milliseconds (reserved)

4.2 Masking Time
Set the time period after detection of a passing of a person or an object until the next
detection is made effective.
Switch No.

Masking time

3

4

OFF

OFF

Nil

ON

OFF

0.1 seconds (default setting)

OFF

ON

0.5 seconds

ONON

1.0 second

The Receiver uses a "re-trigger system" in which the masking time is extended if a passingof a person or an object is detected during the masking time.

Detection
Output signal
Masking time

Masking time
Extended masking time(masking re-triggered)- 10 -

4.3 Status Data Output Interval
Set the interval at which the status data (power reserve of the Transmitter and Receiver,light reception level and setting status of DIP switch) is output.
The status data is output in RS-422 format.
Switch No

Status data output interval

5

6

OFF

OFF

1 secondONOFF

10 seconds (default setting)

OFF

ON

60 seconds

ONON

60 seconds (reserved)

4.4 Status Data Output Baud Rate
Set the baud rate at which the status data is output in RS-422 format.
Switch No

Status data output baud rate

7

8

OFF

OFF

9.6 kbps (default setting)

ON

OFF

19.2 kbps

OFFON

38.4 kbps

ONON

38.4 kbps (reserved)- 11 -

5 INFORMATION ON LED DISPLAY
Various information is displayed on the LED display on the rear of the Photo Beam Receiver
PBU-2000RX.

5.1 Initial Display
When the power is turned on, the firmware version and the setting status of the DIP switch
are displayed.
Display item

Setting

Display

Firmware version
Contact signal output time

15 milliseconds
45 milliseconds

Masking timeNil
0.1 seconds
0.5 seconds
1.0 second

Status data output interval

1 second
10 seconds
60 seconds

Status data output baud rate

9.6 kbps
19.2 kbps
38.4 kbps※ The firmware version display in the above table indicates "Ver. 1.00."

5.2 Display during Operation
While the Receiver is in operation, the light reception level and other information isdisplayed.
Displayed information

Display

Light reception level 5 (maximum level)
Light reception level 4
Light reception level 3
Light reception level 2
Light reception level 1
Measurement of light reception level is still in process.
No light is received.
Contact signal output and masking are in process.
Power reserve of the batteries has been depleted.

(flashing)※ It is recommended that the Photo Beam Unit PBU-2000 be so installed that the light
reception level is “ 4” or more.

- 12 -

6 STATUS DATA OUTPUTPower reserve of the Transmitter and Receiver, light reception level and setting status of the
DIP switch are output as status data.

6.1 Communication Specifications
Item

Details

Interface

RS-422Synchronization method

Start-stop synchronous communication

Data speed

To be selected from 9.6 kbps, 19.2 kbps and 38.4 kbps

Data bit length

8 bit

ParityNone

Stop bit length

1 bit

Flow control

None

6.2 Data Format
No.

Data type

Value

1

Header0x23

2

Details

0x53

3

Number of

0x0A

Number of bytes from product code to CRC

Code indicating product type
PBU-2000
Code indicating encryption method
No encryption

remaining
bytes
4Product code

0x01

5

Encryption

0x00

code
6

Command0x01

7Serial No.

0x**

8

Status data output

0x**

11

DIP switch

0x**

Four higher-order bits and four lower-order bits indicate
power reserve of Transmitter and Receiver, respectively.
2：Sufficient power reserve remains.
1：Power reserve nears its end.
0：Power reserve has been depleted (for Transmitter only)
F：Power reserve is unknown (for Receiver only)
0x00：No light is received.
0x01～0x05：Values indicating light reception level
0x10：Measurement of light reception level is still in process.
0xF0：Contact signal output and masking are in process.
The highest-order bit corresponds to No. 8 of DIP switch.

12

CRC

0x**

CRC-16-CCITT(CRC-ITU-T)

0x**

Generating polynomial：X16+X12+X5+1

9

Power

0x**

reserve

10

Light

0x**

reception
level

13

※ When an external battery is used, the power reserve indicator LED do not indicate
the status of the power reserve accurately.

- 13 -

7 SPECIFICATIONS
7.1 Photo Beam Transmitter PBU-2000TX
Photo beam wavelength

670 nm (red)Operable distance

Up to 100 m
1. LR6 (AA) alkaline dry batteries or HR06 (AA) Ni-MH

Power supply

rechargeable batteries, 4 pcs
2. External battery (DC 12 V)

Operable time

72 hours or more (under the temperature of +25° C)
Connector

1：GND

External
connection
connector

NC5MPR-HD (Neutrik)Pinassignment

2：Reserved
3：Reserved
4：Reserved
5：External power input (DC 12 V)

Operationaltemperature
range

During-20 °C ~ +50 °C (non-condensing)operation※ +5 °C ~ 45 °C when alkaline dry batteries are used

Duringstorage

Water resistance

External
appearance

Weight-25 °C ~ +55 °C (non-condensing)
IPX2 (drip-proof type II)

Dimensions

97 (W) × 130 (H) × 152 (D) mm (excluding protrusions)

Material

Stainless steel

Treatment

Painting (cover: yellow, body: black)
Approx. 1.5 kg (excluding batteries)- 14 -

7.2 Photo Beam Receiver PBU-2000RX
Operable distance

Up to 100 m
1. LR6 (AA) alkaline dry batteries or HR06 (AA) Ni-MH
rechargeable batteries, 4 pcs

Power supply

2. External battery (DC 12 V)
Operable time

24 hours or more (under the temperature of +25 °C)
Connector

NC5MPR-HD (Neutrik)
1：GND, contact signal output (-)

External
connection

Pinconnector

assignment

2：Contact signal output (+)
3：Status data output (-) (RS-422)
4：Status data output (+) (RS-422)
5：External power input (DC 12 V)

Contact

MethodsignalOutput time 15 milliseconds or 45 milliseconds
None, 0.1 seconds, 0.5 seconds or 1 second

Masking time
Operationaltemperature
range

During-20 °C ~ +50 °C (non-condensing)operation※ +5° C ~ 45 °C when alkaline dry batteries are used

Duringstorage

Water resistance

External
appearance

WeightMake contact, rating: 30 V 500 mA-25 °C ~ +55 °C (non-condensing)
IPX2 (drip-proof type II)

Dimensions

97 (W) × 130 (H) × 152 (D) mm (excluding protrusions)

Material

Stainless steel

Treatment

Painting (cover: yellow, body: black)
Approx. 1.5 kg (excluding batteries)- 15 -

- 16 -

If you have any question, inquiry or request for repair
regarding the Photo Beam Unit PBU-2000, pleasecontact your SEIKO dealer or agent.

-------------------------------------------------------------------------------------GUARANTEE
Thank you very much for purchasing SEIKO Photo Beam Unit PBU-2000.
We certify that the Product is guaranteed against defects in material and workmanshipaccording to the guarantee conditions specified herein.
If the Product malfunctions under normal use as described in this Operating Manual within
one year from the date of purchase, it will be repaired without charge.
To qualify for the services under the guarantee, you must present your SEIKO Photo Beam
Unit PBU-2000 to the retailer from whom it was purchased, or a service facility designatedby us.

Packaging and transportation charges are to be paid by the owner of the Product.

Even within the guarantee period, repair services will be provided at cost in the following
cases:(1) Failure or damage caused by misuse or carelessness;(2) Failure or damage caused by improper repair or modification;(3) Failure or damage caused by improper handling such as dropping of the Productduring transportation after purchase;(4) Failure or damage caused by natural disasters such as fire, flood, earthquake andlightning, and other factors beyond the control of us such as smoke and other air
pollution and extraordinary atmospheric pressure;(5) Scratches, cracks or other damage on the case caused by use over time;(6) If the name of the retailer and the purchase date are not indicated in the space below, or
if such information has been rewritten; and(7) If this Guarantee is not submitted together with the Product.
Date of purchase:
Retailer:

Please note that this Guarantee is valid only if the name of the retailer and the date ofpurchase are properly entered by the retailer from whom your SEIKO Photo Beam Unit
PBU-2000 was purchased.

I-7026-1E