YOKOGAWA UT55A - Communication Interface Wiring

17-26
IM 05P01C31-01EN
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 (for UT55A only)
ML2-□
SG
SDB (+)
SDA (–)
RDB (+)
RDA (–)
RDB (+)
RDA (–)
SDB (+)
SDA (–)
SG
RDB (+)
RDA (–)
SDB (+)
SDA (–)
SG
RS-232C
Straight cable
UT
2
1
4
3
5
6
UT
Class D grounding
(grounding resistance
of 100 Ω or less)
Communication
cable
Class D grounding
(grounding resistance
of 100 Ω or less)
Communication
cable
Class D grounding
(grounding resistance
of 100 Ω or less)
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 (for UT55A only)
SG
ML2-
□ UT
B (+)
A (–)
SDB (+)
SDA (–)
RDB (+)
RDA (–)
SG
SDB (+)
SDA (–)
RDB (+)
RDA (–)
SG
RS-232C
Straight cable
PC
4
3
5
6
Class D grounding
(grounding resistance
of 100 Ω or less)
UT
(External)
Terminating resistor
220 Ω 1/4 W
(External)
Terminating
resistor
220 Ω 1/4 W
Communication
cable
Class D grounding
(grounding resistance
of 100 Ω or less)
Communication
cable
Class D grounding
(grounding resistance
of 100 Ω or less)
UT55A/UT52A
Terminal
symbol
above
(For Standard model)
UT55A Sufx code: Type
3 = 1; however, Type 2 = 1
or 6 excluded
(For Detailed model)
UT55A Optional sufx
code: /CH3
(For Standard model)
UT55A Sufx code: Type 2
= 1 or 2; however, without
optional sufx code /LP
(For Detailed model) UT55A
Optional sufx code: /C4
(For Detailed model)
UT52A Optional sufx
code: /CH1
RDB(+) 410 504 304
RDA(–) 411 505 305
SDB(+) 407 501 301
SDA
(–) 408 502 302
SG 409 503 303
17.4 Wiring