Omron SYSMAC NX-CIF Series - Page 91

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4 Installation and Wiring
NX-series Communications Interface Units User’s Manual (W540)
4-4 Wiring Communications
4
4-4-3 Examples of Recommended RS-232C and RS-422A/485 Wiring
 Four-wire Connections with One Transmitting Node and N Receiving Nodes
Terminating
resistance
Terminating
resistance
Terminating
resistance
Terminating
resistance
Shield
Serial communications
device
Shield
Serial communications
device
Signal
RDA(-)
RDB(+)
SDA(-)
SDB(+)
FG
Signal
RDA(-)
RDB(+)
SDA(-)
SDB(+)
FG
Signal
SDA-
SDB+
RDA-
RDB+
TERSDA-
TERSDB+
TERRDA-
TERRDB+
FG
FG
Terminal No.
A1
B1
A4
B4
A3
B3
A6
B6
A8
B8
NX-CIF105
Signal
RDA(-)
RDB(+)
SDA(-)
SDB(+)
FG
Signal
RDA(-)
RDB(+)
SDA(-)
SDB(+)
FG
Signal
SDA-
SDB+
RDA-
RDB+
TERSDA-
TERSDB+
TERRDA-
TERRDB+
FG
FG
Terminal No.
A1
B1
A4
B4
A3
B3
A6
B6
A8
B8
NX-CIF105
Terminating
resistance
Terminating
resistance
Shield
Serial communications
device
Shield
Serial communications
device