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7.2 Electrical Installation of the Sensors
Electrical installation of the flow
sensor
Electrical installation of the ampero‐
metric sensors
Installing Sensors in the Bypass Fitting DGMa
The bypass fitting can be fitted with different sensors. All the dif‐
ferent types of sensors listed here can be fitted but do not have to
be.
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
Contact
1
NC
2
Root (C)
3
N/O
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
31
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