19
LRR 1-50, LRR 1-51 - USA - Installation & Operating Manual -
850702-01
In the control cabinet: Electrically connecting the conductivity controller
Wiring diagram of the LRR 1-51 conductivity controller
5
Connection of supply voltage 24 V DC
with 0.5A medium time-lag fuse provided by
customer
6
Actual value/manipulated variable output 4-20 mA
(switch-selectable)
7
Conductivity transmitter LRGT 1.-.., 4-20 mA,
with grounding point
8
Central grounding point (CGP) in control cabinet
Key
0
MAX output contact
a
Supply voltage L2
b
Supply voltage N
OPERATING
OPEN
CLOSED
Actuator EF
M0.5A
(medium
time-lag)
8
b
5
7
6
a
0
Fig. 4
When the burner, and therefore the supply
voltage to the controller, is switched off (stand-
by), L2 must remain on until the actuator has
closed the continuous blowdown valve.
