GP4000 Series Hardware Manual
75
Specifications of Serial Interface COM2
Introduction
NOTE: For instructions on how to connect to other devices, always refer to the “GP-
Pro EX Device/PLC Connection Manual”.
The COM2 ports of GP-4301T and GP-4301TW are not isolated. The SG (signal
ground) and FG (frame ground) terminals are connected inside the GP unit.
Serial Interface COM2
GP-4301T / GP-4301TW: D-Sub 9 pin plug connector via an RS-422/485 cable.
Interfit bracket is #4-40 (UNC).
Recommendations:
z Cable Connector: XM2D-0901 manufactured by OMRON Corporation.
z Cable Cover: XM2S-0913 manufactured by OMRON Corporation.
z Jack Screw (#4-40 UNC): XM2Z-0073 manufactured by OMRON Corporation.
DANGER
ELECTRIC SHOCK
When using the SG terminal to connect an external device to the panel:
z Verify that a short-circuit loop is not created when you set up the system.
z Connect the #5 SG terminal to remote equipment when the host (PLC) unit is
not isolated. Connect the #5 SG terminal to a known reliable ground connection
to reduce the risk of damaging the circuit.
Failure to follow these instructions will result in death or serious injury.
Pin Connection Pin
No.
RS-422/RS-485
Signal Name Direction Meaning
1 RDA Input Receive Data A (+)
2 RDB Input Receive Data B (-)
3 SDA Output Send Data A (+)
4 ERA Output Data Terminal Ready A (+)
5 SG - Signal Ground
6 CSB Input Send Possible B (-)
7 SDB Output Send Data B (-)
8 CSA Input Send Possible A (+)
9 ERB Output Data Terminal Ready B (-)
Shell FG – Frame Ground (Common
with SG)
CAUTION
LOSS OF COMMUNICATION
z All connections to the communication ports must not put excessive stress on the
ports.
z Securely attach communication cables to the panel wall or cabinet.
z Use only D-Sub 9 pin cables with a locking tab in good condition.
Failure to follow these instructions can result in injury or equipment damage.
9
6
5
1
(GP unit side)
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