GESTRA NRR 2-52 - Wiring Diagram of the NRR 2-52 Level Controller

30 NRR 2-52, NRR 2-53, URB 55 - USA- Installation & Operating Manual - 850698-00
Wiring diagram of the NRR 2-52 level controller
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24 V DC
4-20 mA
+
H
LS
–
M 0,5 A
+
–
4-20 mA
+
–
4-20 mA
+
–
1
3
+12 V
13 14
+
–
+
–
0 - 1K
Ω
–
+
MIN
CLOSED
Supply voltage,
Fuse provided by customer
M0.5A (medium time-lag)
Analog input 2
for feedwater flowrate (optional)
Data line
for URB 55
OPEN
MAX
Actual value output X
Indication of valve position
(potentiometer 0 - 1000 W)
OUT
MIN alarm Control valve
actuation
Relay output for
MAX alarm
3 s 3 s
Digital 24 V DC input -
alarm signal from control center *
Analog input 3
for steam flowrate
(optional)
= shiel
d
NRGT 26-2
Fig. 18
* has no impact
on control
Relay output for
M