Important safety information
7
The installation site is at altitudes under 2000 m.
The maximum relative humidity is 80% at temperatures of up to
31°C (linear declining up to 50% relative humidity at 40°C).
The device must always be protected against wetness and mois-
ture. Under no circumstances may it be exposed to splashed water
or condensate.
Surge category II
Soiling degree II
Requirements of cable for mains voltage and sys-
tem components and installed lines
Use only cables and installed lines which meet the following require-
ments:
Dielectric strength 30 V … 260 V according to the nominal voltage
(see specification plate)
The cable ducts installed by Gebr. Heyl in the device have a
clamping range of 4.5 mm – 10 mm. This means that the external
diameter of the laid cable must remain within the range of 4.5 mm
– 10 mm. If you use other ducts, the cable diameters must corre-
spond to the ducts.
The terminal strips on the circuit board require core cross-sections
of between 0.08 mm
2
and 2.5 mm
2
. This applies to single-wire and
fine-wire cores with wire end ferrules without plastic collar.
For fine-wire cores with wire end ferrules and plastic collar, the
cross-section may be up to 1.5 mm
2
.
For single-wire cores, AWG28 – AWG12 can also be used.
Optimum cross-section of the cores
If the core cross-section is less than 0.5 mm
2
, jamming may occur
when the cores are loosened from the terminal strip. We therefore
recommend using wires with cross-sections greater than 0.5 mm
2
.
Requirements for cable ducts
The recesses in the housing are intended for M16 ducts.
The ducts should have a smooth and rounded opening (to protect
against bending and abrasion).
Be careful to ensure securely fastened bending protection, which
must be five times the length of the maximum cable diameter.
The duct should include a strain relief that prevents slippage of the
cable and that cannot be disengaged without a tool.
You can order cable ducts from us as spare parts (Spare parts and
accessories).
If you use another cable duct, the material must have a flammabil-
ity rating of V1 or better.
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