External Interfaces - IDEC MICRO/I HG2J-7U Hardware Manual

3.4 External Interfaces

• Make sure to turn off the power to the HG4G/3G, HG2G-5F before wiring each interface or switching the
terminating resistor selector switch.
• Note that only one of the RS232C or RS422/485 interfaces can be used at same time. Wiring both interfaces will
result in failure of the HG4G/3G, HG2G-5F. Wire only the interface used.
Serial Interface (COM1)
●
Interface Specification
Connector
Screw lock bracket
1 5
6 9
No. Name
1 4W-RDA/2W-A
2 RD
3 SD
4 4W-SDA
5 SG
6 4W-RDB/2W-B
7 RS
8 CS
9 4W-SDB
RS232C, RS422/485
D-sub 9-pin (Plug)
Inch Screw Thread #4-40 UNC
I/O
IN/INOUT Receive Data (+) [4W]/ Send and Receive Data (+) [2W]
IN Receive Data
OUT Send Data
OUT Send Data (+) [4W]
- Signal Ground
IN/INOUT Receive Data (-) [4W]/ Send and Receive Data (-) [2W]
OUT Request to Send
IN Clear to Send
OUT Send Data (-) [4W]
MICRO/I Hardware Manual
Function
3 HG4G/3G, HG2G-5F
1
Communication type
RS422/485
RS232C
RS232C
RS422/485
-
RS422/485
RS232C
RS232C
RS422/485
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