Installation (Electrical); Switching Of Inductive Loads - ProMinent DULCOMETER Assembly And Operating Instructions Manual

Mounting and installation
4.3.3

Installation (electrical)

The cable must be routed in a site-
provided cable duct to ensure strain
relief
1. Undo the four housing screws
2. Slightly lift the controller housing
top section forwards and fold it to
the left
Fig. 16: Punch out threaded holes
3.
Large threaded connection (M
20 x 1.5)
Small threaded connection (M
16 x 1.5)
Punch out as many threaded con‐
nections on the bottom side of the
controller housing bottom section
as required
4. Screw the required threaded con‐
nections in and tighten
36
5. Insert the reducing inserts in the
threaded connections according to
the cable cross sections used
6. Guide the cables into the threaded
connections
7. Tighten the clamping nuts of the
threaded connections so that they
are properly sealed
8. Click the controller housing top sec‐
tion on to the controller housing
bottom section
9. Manually tighten the housing
screws
10. Once again check the seating of the
seal. Only if the mounting is correct,
is protection class IP 67 (wall/pipe
mounting) or IP 54 (control panel
mounting) achieved
4.4

Switching of inductive loads

A0272
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 circuit is also referred to as a
snubber or Boucherot member. It is pri‐
marily used to protect switching contacts.