GESTRA NRR 2-52, Оригинальная инструкция по установке

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13
In control cabinet: Wiring level controller
Wiring diagram for level controller NRR 2-52
8
Fixing screws for terminal strip
9
MIN output contact, de-energizing delay:
3 sec.
0
Output contacts for activating the control
valve
a
MAX output contact, de-energizing delay:
3 sec.
b
Connection of supply voltage 24 V DC with
fuse 0.5 A (semi-delay) provided on site
c
Actual value output 4-20 mA (optional)
Key
d
Indication of valve position,
potentiometer 0 - 1000 Ω
e
IN 2 / 4-20 mA for feedwater flowrate (optional)
f
IN 3 / 4-20 mA for steam flowrate (optional)
g
Data line for operating & display unit URB 50
h
Level electrode NRG 21.-.. NRG 26-21 (Fit a 6.8
kOhm resistor between terminals 13, 14 of the
level electrode ER 96).
i
Level transmitter NRGT 26-1, 4-20 mA,
with screen connected in terminal box.
j
Central earthing point (CEP) in control cabinet
M 0.5 A
(semi-delay)
Fig. 7
NRR 2-52
8 8
8 8
9 0 a
b c
d
e f g
h
j
i
0
MIN MAX CLOSED OPEN