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 Suffix code: Type
3 = 1; however, Type 2 = 1
or 6 excluded
(For Detailed model)
UT55A Optional suffix
code: /CH3
(For Standard model)
UT55A Suffix code: Type 2
= 1 or 2; however, without
optional suffix code /LP
(For Detailed model) UT55A
Optional suffix code: /C4
(For Detailed model)
UT52A Optional suffix
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
Содержание UTAdvanced UT55A
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