GESTRA LRR 1-52, Руководство по установке

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17
In control cabinet: Wiring the conductivity controller
- continued -
Wiring diagram for conductivity controller LRR 1-53
8
Fixing screws for terminal strip
9
MIN output contact, de-energizing delay
3 sec. or actuation of intermittent blowdown
valve
0
Output contact for actuation of continuous
blowdown 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
d
Indication of valve position,
potentiometer 0 - 1000 Ω
Key
e
Data line for operating & display unit URB 50
f
Conductivity electrode LRG 1.-.. (Terminal
13/14: A resistance thermometer can be
connected)
g
Conductivity electrode LRG 16-9 with integrated
resistance thermometer
h
Conductivity transmitter LRGT 1.-..,
4-20 mA, with earthing point
i
Central earthing point (CEP) in control
cabinet
j
Stand-by input, 24 VDC, for external command
"Control OFF", "Valve CLOSED", "Intermittent
blowdown OFF"
j
Fig. 8
8 8
8 8
9 0 a
M 0.5 A
(semi-
delay)
b c
d
e h i
(–) (+)
i
0
MIN MAX CLOSED OPEN