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Installing sensors in the bypass fitting DLG III/IV
Electrical installation of the flow
sensor
Electrical installation of the ampero‐
metric sensors
Fig. 9: 2-wire connection
36
Only wire protective low voltage (SELV in accord‐
ance with EN 60335-1) to the flow sensor.
The cable needs to have a diameter of 4 mm, so
that the cable connector achieves degree of pro‐
tection IP 65.
1.
Hold the top part of the flow sensor and turn it a quarter-turn
counter-clockwise (bayonet fitting).
2.
Loosen the clamping screw on the M12 threaded connector
and feed the cable through the alarm device
3.
Remove 2 cm from the cable sheath
4.
Isolate the ends of the wires
5.
Fit the cable end sleeves
6.
Connect the flow sensor to an alarm device as per the table:
Terminal
1
2
3
Technical data for the reed switch, potential-free:
Switching power max. 3 W
n
Switching voltage, max. 42 V protective low voltage
n
(SELV)
Switching current max. 0.25 A
n
7.
Bring approx. 5 cm of the cable into the flow sensor and
tighten the clamping screw on the M12 threaded connector
8.
Push the top part of the sensor fully into the housing and
tighten it carefully in a clockwise direction until it can go no
further, ensuring that the nibs of the bayonet fixing do not
break off
1.
Turn the top part of the sensor a quarter turn counter-clock‐
wise and remove it
2.
Loosen the clamping screw on the M12 threaded connector
and feed through the measuring line from the control device
3.
Strip the cable ends, fit the cable ends with cable end
sleeves (⌀ max = 0.5 mm
2-wire connector: 1 = plus, 2 = minus
4.
Insert approx. 5 cm of the measuring line into the sensor
5.
Tighten the clamping screw on the threaded connector
6.
Push the top part of the sensor right into the sensor shaft and
tighten it clockwise up to the stop
A0102
Contact
NC
Root (C)
N/O
2
) and connect the cable ends to the
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