ero electronic ELK Guía Del Usario página 53

Conductive pollution
Electrically conductive pollution must be excluded from
the cabinet in which the controller is mounted. For
example, carbon dust is a form of electrically
conductive pollution. To secure a suitable atmosphere
in conditions of conductive pollution, fit an air filter to
the air intake of the cabinet. Where condensation is
likely, for example at low temperatures, include a
thermostatically controlled heater in the cabinet.
This product has been designed to conform to BSEN61010
installation category II, pollution degree 2. These are
defined as follows:-
Installation Category II (CAT II)
The rated impulse voltage for equipment on nominal 230V
supply is 2500V.
Pollution Degree 2
Normally only non conductive pollution occurs.
Occasionally, however, a temporary conductivity caused by
condensation shall be expected.
Part number HA028438. Issue 3.0. Oct-05
Grounding of the temperature
sensor shield
In some installations it is common practice to
replace the temperature sensor while the
controller is still powered up. Under these
conditions, as additional protection against
electric shock, we recommend that the shield
of the temperature sensor is grounded. Do not
rely on grounding through the framework of
the machine.
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