GP3000 Series Hardware Manual
4-66
4.5.3 Interface Specifications
This section describes the specifications of each interface of the GP Series unit.
Serial Interfaces
Serial Interface (COM1)
This interface is used to connect an RS232C/RS422/RS485 serial cable. A D-sub 9-pin plug connector is
used.
Communication method is switched via software
<GP unit side>
<Cable side>
• 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 GP 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 connecting an external device to the GP using the SG terminal, be sure to
check that no short-circuit loop is created when you setup the system.
• When isolation is necessary, you can use either RS232C isolation unit (CA3-ISO232-01) on
COM1 or RS485 isolation unit (CA3-ISO485-01) on COM2.
GP Connector XM2C-0942-502LX <OMRON Co.>
Interfit Bracket #4-40(UNC)
Recommended Cable Connector XM2D-0901 <OMRON Co.>
Recommended Cable Cover XM2S-0913 <OMRON Co.>
Recommended Jack Screw
(#4-40 UNC)
XM2Z-0073 <OMRON Co.>
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