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1.4 External Interfaces
• Make sure to turn off the power to the HG2J-7U before wiring each interface.
• The serial interface (COM) can be used as the RS232C and RS422/485 interfaces at same time.
• Use the SELV (Safety Extra-Low Voltage) circuit to connect each interface.
Serial Interface (COM)
●
Use applicable cables for wiring and recommended ferrules (made by IDEC, Phoenix Contact or Weidmüller) as
follows.
Interface Specification
Connector
Applicable cable
Conductor Type
*1
Wire Strip Length
Recommended ferrule
No.1
No.
Name
1
SD
2
RD
3
RS
4
CS
5
SG
6
SDA
7
SDB
8
RDA
9
RDB
Only one ferrule can be inserted into a terminal hole.
Please set another terminal block in the vicinity of the main unit and connect SG when using RS232C and
RS422/485 requiring crossover wiring at the same time. And separate the communication cables so that
they do not affect each communication waveform when using RS232C and RS422/485 at the same time.
*1 Strip the sheath of the wire 8 to 9 mm from the end.
8 to 9 mm
RS232C, RS422/485
Detachable Terminal Block 9-pin
AWG16 to 28
Solid wire or Stranded wire
8 to 9 mm
ST3L-H025-12WJ
S3TL-H034-12WT
S3TL-H05-14WA
S3TL-H075-14WW
(IDEC)
No.9
I/O
OUT
Send Data
IN
Receive Data
OUT
Request to Send
IN
Clear to Send
―
Signal Ground
OUT
Send Data (+)
OUT
Send Data (-)
IN
Receive Data (+)
IN
Receive Data (-)
MICRO/I Hardware Manual
AI 0,25-8YE
AI 0,34-8TQ
AI 0,5-8WH
AI 0,75-8GY
(Phoenix Contact)
Function
1 HG2J-7U
H0,25/12 HBL
H0,34/12 TK
H0,5/14 OR
H0,75/14 W
(Weidmüller)
Communication type
RS232C
RS422/485
1-3
1
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