Pv Input Wiring - YOKOGAWA UT Advanced UT32A User Manual

17.4.2 PV Input Wiring
IM 05P01D31-01EN
1) Be careful of polarity when wiring inputs. Reversed polarity can damage the UT.
2) Keep the PV input signal line as far away as possible from the power supply
circuit and ground circuit.
3) For TC input, use shielded compensating lead wires for wiring. For RTD input,
use shielded wires that have low conductor resistance and cause no significant
differences in resistance between the three wires.
4) If there is a risk of external lightning surges, use a lightning arrester etc.
UT35A/UT32A
TC Input
Compensating lead wire
TC
Shield
Class D grounding
(grounding resistance
of 100 Ω or less)
DC Voltage (mV, V) Input
+
+
202
DC voltage
203
–
–
Shield
Class D grounding
(grounding resistance of 100
Use
PV input is used for PV input.
CAUTION
RTD Input (3-wire system)
RTD
+
202
PV
–
A
203
b
Lead wire resistance per wire of
10 Ω or less. Make the resistance
of the three wires equal.
DC Current (mA) Input
–
DC current
PV
+
Ω or less) (grounding resistance of 100
17.4 Wiring
Shield
A
201
b
PV
202
B
203
B
Class D grounding
(grounding resistance
of 100 Ω or less)
–
203
PV
204
+
Shield
Class D grounding
Ω or less)
17-7
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