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3 When a JW-1324K/1342K/1424K/1442K/1624K/1642K is used
The IV-S20 can only be connected to the RS-422 port. When the communication port is used,
provide a 2-wire RS-422 system. When the MMI port is used, provide a 4-wire RS-422 system.
1. When the communication port is used
Communication connector on
the IV-S20 (RS232C/RS422)
Pin No.
4
8
7
9
Connector
shield
2. When the MMI port is used
Communication connector on
the IV-S20 (RS232C/RS422)
Pin No.
4
7
8
9
Connector
shield
4 When a Z-311J/312J is used
1. Communication through the RS-232C port
Communication connector on
the IV-S20 (RS232C/RS422)
Pin No.
Connector
shield
3
2
5
2. Communication through the RS-422 port (4-wire system)
Communication connector on
the IV-S20 (RS232C/RS422)
Pin No.
Signal name
4
7
8
9
Connector
shield
Signal name
TA
RA
TB
RB
FG
Shielded, twisted-pair cable
1 km or less
RS-422 (2-wire system)
Signal name
TA
TB
RA
RB
FG
Shielded, twisted-pair cable
1 km or less
RS-422 (4-wire system)
Signal name
FG
SD
RD
SG
15m or less
RS-232C
TA
TB
RA
RB
FG
Shielded, twisted-pair cable
1 km or less
RS-422
14-21
JW-1324K/1342K/1424K
/1442K/1624K/1642K
(Communication port)
Terminal name
L1
L2
SHLD
JW-1324K/1342K/1424K
/1442K/1624K/1642K
MMI port
Pin No.
Signal name
2
RX
7
RX
3
TX
8
TX
4
PG COM
5
GND
Z-311J/312J
(Communication port CN3)
Pin No.
Signal name
1
FG
3
RDc
2
TDc
7
GND
6
Short-circuit
terminal
8
Z-311J/312J
(Terminal block TC1)
Pin No.
Signal name
3
RD
4
/RD
1
TD
2
/TD
5
FG
Computer Link
14
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