10
8.
Removing and closing the cover
The cover may only be opened in non-hazardous areas and only in a dry environment.
Attention!
Observe precautions for handling.
•
Ground the actuator.
•
Before opening the cover, touch grounded housing parts.
9. Electric supply
9.1 Safety instructions
Before connecting to the mains, ensure that the mains supply is isolated and secured
against an accidental switching-on.
Remove the cover of the actuator in order to connect the electric supply (see 8.).
The mains connecting cables must be suitably dimensioned to accept the max. current requirement of the actuator.
The yellow-green coloured cables may
only
be used for connecting to earth.
When you insert the cable through the drive cable connector, ensure that the max. bending radius for the cable is
observed.
PSF-M-EX electric actuators do not have an internal electrical power switch. A switch or power mains switch must be
provided in the building installation. It should be positioned closely to the device and be easily accessible for the user
and shall be labelled as the mains isolator switch for the actuator.
The building installation must also provide power surge trips or fuses corresponding to standard IEC 60364-4-41 with
protection class I resp. protection class III (24 VAC / 24 VDC) for the actuator connections.
Please protect all of the power supply and control cables in front of
the terminals mechanically by using suitable measures against
unintentional loosening. Never install the power supply and the
control cables together in one line but instead please always use
two different lines.
Open
:
Loosen the screws by using a screwdriver and unscrew
them entirely out of the gear casing. The screws are
protected against loss. Remove the cover carefully so as
not to damage the seal.
Close
:
Put the cover on the gear casing and press down slightly.
Tighten the screws gently and then crosswise. It must be
ensured that all screws are tightened firmly to guarantee
protection against ingress of water and dust in
accordance with EN 60529 to IP65. The tightening torque
for the Ex e/t cover is 3 Nm.
Figure 6:
Removing and closing the cover
Cross recess
screw
