YOKOGAWA UT55A - Page 402

17-33
IM 05P01C31-01EN
Installation and Wiring
17
RS-485communicationwiringfortheserialgatewayfunctionisasfollows.
2-wire Wiring of 4-wire Terminal (for UT55A only)
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
407
408
409
UT UT
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 (Slave terminals)
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
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
UT UT
407
408
409
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 (Slave terminals)
Terminal
symbol
above
(For Standard model) UT55A Sufx code: Type
2 = 1 or 2, and with optional sufx code /LP
(For Detailed model) UT55A Optional sufx
code: /AC4 or /LC4
(For Standard model) UT52A Sufx
code: Type 2=1
(For Detailed model) UT52A Optional
sufx code: /RCH1 or /LCH1
RSB(+) 501 301
RSA(–) 502 302
SG 503 303
17.4 Wiring