Switching Of Inductive Loads - ProMinent DULCOMETER diaLog DACb Assembly And Operating Instruction

2. Slightly pull the upper part of the housing to the front and insert the top part of the housing in
its parked position in the lower part of the housing.
3.
Large threaded connector (M 20 x 1.5).
Medium threaded connector (M 16 x 1.5).
Small threaded connectors (M 12 x 1.5).
4. Route the cable into the controller.
5. Connect the cable as indicated on the terminal diagram.
6. Tighten the clamping nuts of the threaded connectors so that they are properly sealed.
7. Fit the upper part of the housing onto the lower part of the housing.
8. Manually tighten the housing screws.
9. Once again check that the seal is seated properly. The degree of protection IP 67 (wall/pipe-
mounted) or IP 54 (control panel-mounted) (degree of contamination 2/macro-environment)
can only be ensured if installation is correct.
7.3.5

Switching of inductive loads

If you connect an inductive load, i.e. a
consumer which uses a coil (e.g. an
alpha motorised pump), then you must
protect your controller with a protective
circuit. If in doubt, consult an electrical
technician for advice.
The RC member protective circuit is a simple,
but nevertheless very effective, circuit. This cir‐
cuit is also referred to as a snubber or Bou‐
cherot member. It is primarily used to protect
switching contacts.
Assembly and installation
When switching off, the connection in series of
a resistor and capacitor means that the current
can be dissipated in a damped oscillation.
Also when switching on, the resistor acts as a
current limiter for the capacitor charging
process. The RC member protective circuit is
highly suitable for AC voltage supplies.
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