YOKOGAWA UT55A - Valve Position Output And Feedback Input Wiring

17-13
IM 05P01C31-01EN
Installation and Wiring
17
17.4.5 ValvePositionOutputandFeedbackInputWiring
 CAUTION
1) Use an auxiliary relay for load-switching if the contact rating is exceeded.
2) Keep the relay output wires and the feedback input wires at least 30 cm apart.
3) The output relay has a limited service life. Be sure to connect a CR filter (for AC)
or diode (for DC) to the load.
4) If there is a risk of external lightning surges, use a lightning arrester etc.
5) Relays cannot be used for a small load of 10 mA or less.
► Whenusingauxiliaryrelay:17.4.4ControlOutput(Relay,Current,andVoltagePulse)Wiring
Relaycontactoutput(UT55A) Relaycontactoutput(UT52A)
507
508
509
VALV
HIGH
(direct)
LOW
(reverse)
COM
Contact rating: 250 V AC, 3 A
30 V DC, 3 A (resistance load)
Note: Cannot be used for a small load of 10 mA
or less.
101
102
103
VALV
HIGH
(direct)
LOW
(reverse)
COM
Contact rating: 250 V AC, 3 A
30 V DC, 3 A (resistance load)
Note: Cannot be used for a small load of 10 mA
or less.
Feedbackinput(resistor)(UT55A) Feedbackinput(resistor)(UT52A)
100%
0%
510
511
512
VALV
Shield
Resistance:
100 Ω to 2.5 k
Ω
Class D grounding
(grounding resistance of 100 Ω or less)
100%
0%
310
311
312
VALV
Shield
Resistance:
100 Ω to 2.5 k
Ω
Class D grounding
(grounding resistance of 100 Ω or less)
Feedbackinput(current)(UT55A) Feedbackinput(current)(UT52A)
510
512
VALV
4 to 20 mA DC
–
+
Shield
Class D grounding
*: Always set the terminal 511 in open state.
310
312
4 to 20 mA DC
–
+
Shield
Class D grounding
* Always set the terminal 311 in open state.
VALV
17.4 Wiring