User guide

 RS-485 Isolation Unit

The RS-485/RS-422 type.

D-Sub 9-pin socket connector's pin assignments are as follows.

The communication method is switched with a change switch.

• For Display side settings please refer to “Display side settings”.

• This unit can not be used for GP4000 Series.

RS-485

Pin Arrangement Pin #

RS-485

Signal Name Direction Meaning

1TRMRX -

Termination

(Receive side: 100Ω)

RDA / SDA

Input /

Output

Receive Data A(+) /

Send Data A (+)

4 NC - No connection

5 SG - Signal Ground

6VCC -

+5V

±5% output 0.05A

*1 The VCC output for Pin #6 is not protected against overcurrent. To prevent

damage or unit malfunctions, use only the rated current.

RDB / SDB

Input /

Output

Receive Data B(-) /

Send Data B(-)

9 TRMTX - Termination (Send side: 100Ω)

Shell FG - Frame Ground

RS422

RS485