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

2 HG5G/4G/3G/2G-V

2.4 External Interfaces

• Make sure to turn off the power to the HG5G/4G/3G/2G-V before wiring each interface or switching the
terminating resistor selector switch.
• The serial interface (COM 1) is used only for the interface of RS232C or RS422/485. Wiring both interfaces will
result in failure of the HG5G/4G/3G/2G-V. Wire only the interface used.
• The serial interface (COM2) can be used as the RS232C and RS422/485 interfaces at same time.
Serial Interface (COM1)
●
Interface Specification
Connector
Screw lock bracket
1 5
6 9
No. Name
1 RDA
2 RD
3 SD
4 SDA
5 SG
6 RDB
7 RS
8 CS
9 SDB
1-20
RS232C, RS422/485
D-sub 9-pin (Plug)
Inch Screw Thread #4-40 UNC
I/O
IN Receive Data (+)
IN Receive Data
OUT Send Data
OUT Send Data (+)
- Signal Ground
IN Receive Data (-)
OUT Request to Send
IN Clear to Send
OUT Send Data (-)
MICRO/I Hardware Manual
Function Communication type
RS422/485
RS232C
RS232C
RS422/485
-
RS422/485
RS232C
RS232C
RS422/485