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Chapter 2 - Specifications

GP-37W3 Series User Manual2-6

When creating your own cable, follow the instructions listed below:

• The following pairs of pin #'s must be connected to each other.

#18 (CSB) <—> #19 (ERB)

#21 (CSA) <—> #22 (ERA)

• When connecting the RS-422 cable and the #9 (TRMX) and #10 (RDA) points, a

termination resistance of 100

ΩΩ

Ω is added between RDA and RDB.

• When making a cable for a Memory Link system, be sure to use a 4-wire type.

• Do not use the following pins: 9 (TRMX), 10 (RDA), 11 (SDA), 15 (SDB), 16

(RDB), 18 (CSB), 19 (ERB), 21 (CSA), 22 (ERA).

• The #1 (FG) terminal should only be connected if it is required by the device being

connected to.

• #23 (BUZZ GND) and #25 (BUZZ OUT) are used for Buzzer Output.

Optical Isolation

Buzzer

SIO

25pin

SIO

23pin

GP-37W3 unit (internal circuit)

Internal Circuit

Buzzer Output

• This unit’s RS485(RS422) port is not isolated, therefore, it is impor-

tant that you connect the SG/GND (Signal Ground) terminals. If this

is not done, the RS485(RS422) circuit may be damaged.

• Pin 14 (VCC) DC5V output is not protected. To prevent damage or

unit malfunction, be sure to use only the designated level of current.

Can drive a DC5V to

DC24V buzzer at up

to 0.3A

Connect the #1 (FG) terminal only if it is required by a connected device.

Pro-face GP-37W3 Series User Manual

Questions and Answers: