Manual

External Interfaces

• This ST unit’s serial interface is not isolated.When the host (PLC) unit is also not iso-

lated, and to reduce the risk of damaging the RS232C/RS422/RS485 circuit, be sure

to connect pin #5 SG (Signal Ground) terminal.

• Similarly shaped connectors are used for COM1 and COM2 of the ST. Therefore, be

sure to connect the correct connectors. Communication is not available unless the

connectors are connected correctly.

• When isolation is necessary, you can use the RS232C isolation unit (CA3-ISO232-01) on

COM1.

 COM1

Recommended Cable Connector XM2D-0901 <made by OMRON Corp.>

Recommended Jack Screw XM2Z-0073 <made by OMRON Corp.>

Recommended Cable Cover XM2S-0913 <made by OMRON Corp.>

Interfit Bracket #4-40 inch screws are used.

Pin #

RS232C

Signal Name Meaning

1 CD Carrier Detect

2 RD(RXD) Receive Data

3 SD(TXD) Send Data

4 ER(DTR) Data Terminal Ready

5 SG Signal Ground

6 DR(DSR) Data Set Ready

7 RS(RTS) Request to Send

8 CS(CTS) Clear to Send

9CI(RI)/VCC

Called status display/

+5V±5% Output 0.25A

*1 The RI/VCC selection for Pin #9 is switched via software. The VCC output is not protected against

overcurrent. To prevent damage or unit malfunctions, use only the rated current.

Shell FG

Frame Ground

(Common with SG)