YOKOGAWA UTAdvanced UP55A, User Manual

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17-7
IM 05P02C41-01EN
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 UP.
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.
TC Input RTD Input (3-wire system)
203
202
TC
–
+
Compensating lead wire
Grounding
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
Grounding
Shield
PV
DC Voltage (mV, V) Input DC Current (mA) Input
203
202
–
+
+
–
DC voltage
Grounding
Shield
PV
204
203
–
+
+
–
DC current
Grounding
Shield
PV
Use
In Single-loop control or Cascade primary-loop control, PV input is used for PV input.
In Loop control with PV switching or Loop control with PV auto-selector, PV input is used
for PV input 1. Remote input (E1-terminal area) is used for PV input 2. In Loop control
with PV auto-selector for 3 inputs or 4 inputs, auxiliary analog inputs are used for PV
input 3 and PV input 4.
In Cascade control, PV input is used for Loop-1 PV input. Remote input (E1-terminal
area) is used for Loop-2 PV input.
17.4 Wiring