Pro-face GP-4402WW - Serial Interface Specifications RS-422;485

Specifications
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Serial Interface Specifications RS-422/485
Introduction
This interface is used to connect GP-4402WW/GP-4502WW to remote equipment, via a RS-
422/485 cable. The connector used is a D-Sub 9-pin male connector.
By using a long PLC cable to connect to the panel, it is possible that the cable can be at a different
electrical potential than the panel, even if both are grounded.
The serial port of the panel is not isolated. The SG (signal ground) and the FG (functional ground)
terminals are separated inside the panel.
Serial Interface RS-422/485
This table describes COM2 with its D-Sub 9-pin connector for a RS-422/485 cable.
Any excessive weight or stress on communication cables may disconnect communication with the
equipment.
DANGER
ELECTRIC SHOCK
 Make a direct connection between the functional ground (FG) terminal and ground.
 Do not connect other devices to ground through the functional ground (FG) terminal of this
device.
 Install all cables according to local codes and requirements. If local codes do not require
grounding, follow a reliable guide such as the US National Electrical Code, Article 800.
Failure to follow these instructions will result in death or serious injury.
Pin connection Pin Signal name Meaning
1 RDA Receive Data A (+)
2 RDB Receive Data B (-)
3 SDA Send Data A (+)
4–
5 SG Signal Ground
6–
7 SDB Send Data B (-)
8–
9–
Shell FG Functional Ground
CAUTION
LOSS OF COMMUNICATION
 All connections to the communication ports must not put excessive stress on the ports.
 Securely attach communication cables to the panel or cabinet.
 Use only D-Sub 9-pin cables with a locking system in good condition.
Failure to follow these instructions can result in injury or equipment damage.