RACK-MOUNT TYPE
MULT CHANNEL V-F CONVERTER
SVF4-01(J), SVF8-01(J)USER'S MANUAL
3111 2760 (rev 1.)

APPLICATION OF ELECTRONIC DEVICESTSUJI ELECTRONICS CO.,LTD3739 Kandatsu-machi Tsuchiura-city
Ibaraki-Pre 300-0013 Japan
Phone +81-(0)29-832-3031
Fax +81-(0)29-832-2662
URL http://www.tsujicon.co.jp

E-mail info2@tsuji-denshi.co.jp

RACK-MOUNT TYPE
MULTI CHANNEL V-F CONVERTER
SVF4-01 (J), SVF8-01 (J)USER'S MANUAL
Type SVF4-01, SVF8-01 are 4 channels or 8 channels V-F converter units which are synchronous with highaccuracy crystal. (1) These units take place two UNITS EIA rack-mount type case. Or it takes two UNITS
JIS rack-mount type case.
This units has 4 steps gain control circuit and polarity exchange circuit. If input signal over the limited level
level over LED lamp will be on, the input signal polarity will be shown by LED lamp.
Each input signal can be used in floating condition, to be stable against electronic noise.
(1) Crystal synchronized VF converter
The merit of this unit is low cost and high accuracy because of the stability of using crystal.
The output frequency consist of integral multiple interval of minimum rezolution one.
1. Specifications
Gain

10V, 1V, 100mV, 10mV full range selectInput voltage level0 ～ 10V

Input impedance

1MΩ

Output level

Positive logic pulse width 200ns or over

Output frequency

0 ～ 1MHz

Changing accuracy± 0.02％ FS or lessScale over

Open collector type transistor "on" from BNC connector

Isolation of input signal and case

Selectable isolation or common ground to case for each channel

Monitor analog output

Analog voltage out correspond to V-F convert frequency

Connectors for input and output

BNC connectors (Isolation type)

Power source

SVF8-01 (J):AC100V 1.0A

Case

EIA 2 UNITS (H=88) D=420 or JIS 2 UNITS (H=99)

SVF4-01 (J):AC100V 0.5A

２．Outside drawing①Power switch

POWER

TSUJI DENSHI

F3A

AC100V

Type SVF8-01 panel outside

2/4②Fuse③AC Connector

①Power switch

Power ON/OFF switch alternatively. When power is ON, inside lamp turn on.

②Fuse

3A glass fuse

③AC Connector

3 pole inlet connecter
AC100V with grounding

３．Explanation of panel for each channel① Lamp LED "RED"② Lamp LED "GREEN"Ｓ Ｃ Ａ Ｌ Ｅ ＰＯＬＡＲＩＴＹＯ Ｖ Ｅ Ｒ （ ＋ ）（ － ）③ Lamp LED "RED"⑧ Analog monitor
Ａ．ＭＯＮ

１Ｖ

１００ｍＶ

１０Ｖ１０ｍＶ④ Gain control⑨ Scale over
ＳＣＡＬＥ

⑤ Select polarity SW

ＯＶＥＲ⑩ Input signal selectＮＯＲＭＡＬ ＲＥＶＥＲＳＥ

ＩＮ

ＯＵＴ

⑥ Output connector

ＦＬＯＡＴ

Ｇ．ＣＯＭ

floating or common ground⑦ Input connector
Front Panel① Scale over LED lamp（RED)Rear Panel
When the input level to VF converter is over 10V, it becomes red.
While this lamp is being red, V-F conversion is not correct.

② Polarity (+) LED lamp (GREEN)
The input signal polarity to VF converter must to be positive.
When this signal is positive, this LED lamp is green.
③ Lamp LED "RED"When the polarity of input signal to VF converter is negative, this LED
lamp becomes red. In this case VF conversion is not correct.
You need to change the polarity of input signal by switch ⑤.

④ Gain control dial

You need to select suitable position according to input signal level.
Each range is as follows.
Position of dialInput signal range
１０V
0 ～ 10V
1V0 ～ 1V
１００ｍV
0 ～ 100ｍV
１０ｍV
0 ～ 10ｍV
When the polarity of input signal to VF converter is negative, it's possible
to change the polarity of it by switch ⑤.

⑤ Select polarity SW

When the polarity of input signal to VF converter is positive, this switch
is set to the NORMAL side. When negative, this switch is set to theREVERSE side.

⑥ Output BNC connector⑦ Input BNC connector⑧ Analog BNC monitor

Positive TTL pulse signal is out from this connector.
This output signal is isolated from system ground, so this output is easy
to adapt the ground of other equipments
This one is analog voltage signal connector for VF conversion.
When selected in float mode by the switch ⑩, input signal is isolated toflame ground.
Positive voltage analog signal to VF convert is out from this connector.
The ground of this signal is same as the one of input signal ⑦．
3/4

⑨ Scale over BNC connector
When the input level is over the range, the open collector type oftransistor is "ON". The ground of this output is floating fromsystem ground.
⑩ Input signal selectfloating or common ground

It's selectable that the contact of the input signal ground and the frame
ground is float or shortening.

４．Details of Input and output circuit format
Analog Input

Pulse Output

+5V

INPUT

OUTPUT

100ｋ Ω75Ω

1 MΩ

Analog Monitor Output

Scale Over Output
SCALEOVER

A-OUT

For the further information, feel free to ask us.

Tsuji-Electronics Co.,Ltd
TEL: +81-(0)29-832-3031 FAX: +81-(0)29-832-2662
E-mail : info2@tsuji-denshi.co.jp
URL : http://www.tsujicon.jp
3739, Kandatsu-machi, Tsuchiura-city, Ibaraki 300-0013, Japan4/4