Interface Serial Interface - Pro-face GP4000 SERIES Installation Manual

Interface
Serial Interface
Note: For instructions on how to connect to other devices, always refer to the "GP-Pro EX
Device/PLC Connection Manual".
ELECTRIC SHOCK
The serial port is not isolated. The SG (signal ground) and the FG (frame
ground) terminals are connected inside the unit. When using the SG terminal
to connect an external device to the unit:
• Verify that a short-circuit loop is not created when you set up the system.
• 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 RS232C/RS422/RS485 circuit.
Failure to follow these instructions will result in death or serious injury.
LOSS OF COMMUNICATION
• All connections to the communication ports must not put excessive stress
on the ports.
• Securely attach communication cables to the panel wall or cabinet.
Failure to follow these instructions can result in injury or equipment
damage.
14
DANGER
CAUTION