YOKOGAWA UT35A-L, Руководство пользователя

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17-7
IM 05P04D41-01EN
Installation and W
iring
17
17.4.2 PV Input Wiring
CAUTION
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-L
TC Input RTD Input (3-wire system)
203
202
TC
–
+
Compensating lead wire
Class D grounding
(grounding resistance
of 100 Ω or less)
Shield
PV
203
202
201
RTD
A
B
b
Lead wire resistance per wire of
10 Ω or less. Make the resistance
of the three wires equal.
A
b
B
Class D grounding
(grounding resistance
of 100 Ω or less)
Shield
PV
DC Voltage (mV, V) Input DC Current (mA) Input
203
202
–
+
+
–
DC voltage
Class D grounding
(grounding resistance of 100 Ω or less)
Shield
PV
204
203
–
+
+
–
DC current
Class D grounding
(grounding resistance of 100 Ω or less)
Shield
PV
Use
PV input is used for PV input.
17.4 Wiring