YOKOGAWA UP55A - Communication Interface Wiring

17-22
IM 05P02C41-01EN
17.4.12 RS-485CommunicationInterfaceWiring
Wire as follows for Modbus communication, PC link communication, or ladder
communication.
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
UP
2
1
4
3
5
6
UP
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-
□
UP
B (+)
A (–)
SDB (+)
SDA (–)
RDB (+)
RDA (–)
SG
SDB (+)
SDA (–)
RDB (+)
RDA (–)
SG
RS-232C
Straight cable
PC
4
3
5
6
Grounding Grounding Grounding
UP
(External)
Terminating resistor
220 Ω 1/4 W
(External)
Terminating
resistor
220 Ω 1/4 W
Communication
cable
Communication
cable
Terminal
symbol
above.
Applicabletosufxcode(for
Standardmodel):Type3=1;
however,Type2=3excluded
Applicabletooptionalsufxcode
(forDetailedmodel):/CH3
Applicabletosufxcode(forStandard
model):Type2=2
Applicabletooptionalsufxcode(for
Detailelmodel):/C4
RDB (+) 410 504
RDA (–) 411 505
SDB (+) 407 501
SDA (–) 408 502
SG 409 503
17.4Wiring