Installation guide

4
External Interfaces
• For instructions on how to connect to other devices, always refer to the “GP-Pro EX
Device/PLC Connection Manual”.
• Always connect the #5 SG (Signal Ground) of the LT unit to the connected device,
especially if the connected device is also not isolated. Failure to do so may damage
the RS232C/RS422/RS485 circuit.
• 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 UNC screws are used.
Pin #
RS232C RS422/RS485
Signal Name Meaning Signal Name Meaning
1 CD Carrier Detect RDA Receive Data A(+)
2 RD(RXD) Receive Data RDB Receive Data B(-)
3 SD(TXD) Send Data SDA Send Data A(+)
4 ER(DTR) Data Terminal Ready ERA Data Terminal Ready A(+)
5 SG Signal Ground SG Signal Ground
6 DR(DSR) Data Set Ready CSB Clear to Send B(-)
7 RS(RTS) Request to Send SDB Send Data B(-)
8 CS(CTS) Clear to Send CSA Clear to Send A(+)
9CI(RI)/VCC
Called status display/
+5V±5% Output 0.25A
*1
*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.
ERB Data Terminal Ready B(-)
Shell FG
Frame Ground
(Common with SG)
FG
Frame Ground
(Common with SG)