21
H050002740 rel. 1.1 - 17.05.2021
Installation
ENG
Caution
:
•
separate as much as possible the probe and digital input cables from cables to inductive loads and power cables, so as to
avoid possible electromagnetic disturbance. Never run power cables (including the electrical panel cables) and probe signal
cables in the same conduits;
•
the cables must be sized as described in table of Technical specifications;
•
do not install the cables connected to the controller terminal block in the immediate vicinity of power devices (contactors,
circuit breakers, etc.). Reduce the path of cables as much as possible, and avoid spiral paths that enclose power devices.
•
the power supply earth must be connected directly to the controller, without branches to other devices; the cross-section
of the earth wire must be greater than or equal to the cross-section of the phase wires; earth impedance must be compliant
with national and local regulations.
Power supply
Use cables rated for temperatures up to 105°C. Use suitable terminals for the connectors and cables used. Insert the connectors
into the housings provided and fix them in place using the retaining catches. Then lightly tug the cables to check correct
tightness.
50002740_012_R01
U
V
W
L
N
J
2
J
1
U
V
W
PE
PE L N
chest freezer
Fig. 3.n
The controller must be earthed: the spade terminal provided can be used for this purpose. To minimise EMC problems it is
recommended to use a power cable that includes an earth wire, connected to the terminal
. The power supply earth must
be connected directly to the earth bar in the electrical panel, without branches to other devices; the cross-section of the earth
wire must be greater than or equal to the cross-section of the phase wires; earth impedance must be compliant with national
and local regulations; in compliance with UL requirements, protective earth connections must be made using a terminal with
ring connector. Connect the power wires to terminals L1 and N; for the cross-sections of the wires and the type of circuit
breaker (MCB), see “Technical specifications”.
Caution
:
do not connect power to terminals U, V, W.