YOKOGAWA UM33A - Page 140

Installation and Wiring
16
16-15
IM 05P03D21-01EN
Modbus master wiring
RS-485 communication wiring for the serial gateway function is as follows.
Up to 32 UTAdvanced series controllers can be connected.
2-wireWiringof4-wireTerminal
Serial gateway
SG
RSB (+)
RSA (–)
SDB (+)
SDA (–)
RDB (+)
RDA (–)
SG
SDB (+)
SDA (–)
RDB (+)
RDA (–)
SG
(External)
Terminating resistor
220 Ω 1/4 W
(External)
Terminating resistor
220 Ω 1/4 W
310
311
312
UM UM
Communication
cable
Grounding
Communication
cable
Grounding
2-wire Wiring
Serial gateway
SG
RSB (+)
RSA (–)
RSB (+)
RSA (–)
SG
RSB (+)
RSA (–)
SG
(External)
Terminating resistor
220 Ω 1/4 W
(External)
Terminating resistor
220 Ω 1/4 W
UM UM
310
311
312
Communication
cable
Grounding
Communication
cable
Grounding
16.4 Wiring