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4 - 5
(2) When communicating through the RS-422 port
Specify the 4-wire or 2-wire on the [Serial Communication Parameters] menu from the [System
Conditions] menu of IV-S51M in accordance with the actual wiring system.
4-wire system
2-wire system
RS-232C/RS-422
converter Z-101HE
Serial interface on the IV-S51M
Connector case
4
7
8
9
FG
TA
TB
RA
RB
Pin No.
Signal name
Function
SHIELD
RD(+)
RD(–)
TD(+)
TD(–)
FG
TD
RD
SG
1
2
3
7
1km or less(RS-485)
15m or less
(RS-232C)
Shielded twisted-pair
cable
Transmitted data
(IV-S51M personal computer)
Received data
(personal computer IV-S51M)
Frame ground
Personal computer
FG
TD
RD
SG
Signal name
Shielded twisted-pair
cable
RS-232C/RS-422
converter Z-101HE
SHIELD
RD(+)
RD(–)
FG
TD
RD
RS
SG
1
2
3
4
7
15m or less
(RS-232C)
Personal computer
FG
TD
RD
RS
SG
Signal name
Connector case
4
7
8
9
FG
TA
TB
RA
RB
Pin No.
Signal name
Function
Serial interface on the IV-S51M
1km or less(RS-485)
Transmitted data
(IV-S51M personal computer)
Received data
(personal computer IV-S51M)
Frame ground