Chapter 4 Specifications
4-21
Serial Interface (COM2)
This interface is used to connect an RS422/RS485 serial cable. A D-sub 9-pin socket connector is used.
<GP unit side>
<Cable side>
• Always connect close to the GP unit's COM port when terminating with the termination pins
(TRMRX/TRMTX).
GP Connector XM3B-0942-502LX <OMRON Co.>
Interfit Bracket #4-40(UNC)
Recommended Cable Connector XM2A-0901 <OMRON Co.>
Recommended Cable Cover XM2S-0913 <OMRON Co.>
Recommended Jack Screw
(#4-40 UNC)
XM2Z-0073 <OMRON Co.>
Pin
Arrangement
Pin No.
RS422/RS485
Signal Name Direction Meaning
1 TRMRX -
Termination
(Receiver side: 100Ω)
2 RDA Input Receive Data A(+)
3 SDA Output Send Data A(+)
4 RS(RTS) Output Request for Send
5 SG - Signal Ground
6VCC - +5V
±5% Output 0.25A
*1
*1 The VCC output for Pin #6 is not protected against overcurrent. To prevent damage
or a unit malfunction, use only the rated current.
7 RDB Input Receive Data B(-)
8 SDB Output Send Data B(-)
9TRMTX -
Termination
(Receiver side: 100Ω)
Shell FG -
Frame Ground
(Common with SG)
6
9
1
5
(GP unit side)
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