YOKOGAWA UM33A - Communication Interface Wiring

16-12
IM 05P03D21-01EN
16.4.8 RS-485CommunicationInterfaceWiring
Wire as follows for Modbus communication, PC link communication, or ladder
communication. Up to 32 UTAdvanced series controllers can be connected.
Always connect a terminating resistor to the station at the end of the communication line.
► Detailsofcommunicationparametersettingsandcommunicationfunctions:UTAdvancedSeries
Communication Interface (RS-485, Ethernet) User's Manual
4-wire Wiring
ML2-
□
SG
SDB (+)
SDA (–)
RDB (+)
RDA (–)
RDB (+)
RDA (–)
SDB (+)
SDA (–)
SG
RDB (+)
RDA (–)
SDB (+)
SDA (–)
SG
RS-232C
Straight cable
UM
2
1
4
3
5
6
UM
Grounding Grounding Grounding
Communication
cable
Communication
cable
PC
(External)
Terminating resistor
220 Ω 1/4 W
(External)
Terminating
resistor
220 Ω 1/4 W
(External)
Terminating
resistor
220 Ω 1/4 W
2-wireWiringof4-wireTerminal
SG
ML2-
□
UM
B (+)
A (–)
SDB (+)
SDA (–)
RDB (+)
RDA (–)
SG
SDB (+)
SDA (–)
RDB (+)
RDA (–)
SG
RS-232C
Straight cable
PC
4
3
5
6
Grounding Grounding Grounding
UM
(External)
Terminating resistor
220 Ω 1/4 W
(External)
Terminating
resistor
220 Ω 1/4 W
Communication
cable
Communication
cable
2-wire Wiring
SG
ML2-
□
B (+)
A (–)
RSB (+)
RSA(–)
SG
RSB (+)
RSA(–)
SG
RS-232C
Straight cable
PC
4
3
5
6
UM UM
Grounding Grounding Grounding
(External)
Terminating resistor
220 Ω 1/4 W
(External)
Terminating
resistor
220 Ω 1/4 W
Communication
cable
Communication
cable
16.4 Wiring