Operational Mode; Protection Class; Mounting Position; Direction Of Rotation - SCHIEBEL AB3 Operating Instructions Manual

1 Introduction/Notes

1.2 Operational Mode

There are two distinct modes of operation: open-loop control operation (operational mode S2 for ON-OFF)
and closed-loop control operation (operational mode S4) according to EN 60034-1. But since there is a great
number of varying and special models made to order, it is recommended to consult the motor model plate for
the mode of operation and the running time.

1.3 Protection class

Actuators with three-phase motors are standardly equipped with the IP 66 protection system (according to EN
50629). Explosion-proof actuators and actuators with plugs are furnished with the IP 65 protection system.
Exceptions are the AC, DC and brake-motor actuators as well as those for other protection systems made to
special order.
WARNING: The protection system imprinted on the model plate only applies if the cable
screwing likewise corresponds to the requisite protection system, the lids are properly closed
and the fitting position according to section 1.4 is observed.
We recommend metallic screwed cable glands with a metrical thread. Furthermore, cable inlets not
be needed must be closed with screw plugs.
On explosion-proof actuators cable glands with protection class
EEx e according EN60079-7 must be used. After removing covers for assembly purposes or adjustment
work, take special care upon reassembly so that seals are not damaged and remain properly fastened. Im-
proper assembly may lead to water entrances and to failures of the actuator.
Allow a certain sag in the connector cables before reaching the screwed cable glands so that water can drip
off from the connector cables without running to the screwed cable glands. As a result, forces acting on the
screwed cable glands are also reduced (see section 1.4).

1.4 Mounting Position

In principle, the installation position is irrelevant. However, based on practical experience, it is advisable to
consider the following for outdoors use or in splash zones:
Mount actuators with cable inlet facing downwards
Do not arrange the motor so that it hangs downwards
Ensure that sufficient cable slack is available

1.5 Direction of rotation

Unless specifically ordered otherwise, the standard direction is (see Figure 3 and Figure 4):
Clockwise rotation = Close
Clockwise rotation of the actuator is given when the output shaft turns counter clockwise when looking on the
output shaft.
Figure 3: AB3 - AB80
All data in these operating instructions refer to the standard rotating direction.
4
Operating instructions for actuators type AB
OM-ENGLISH-AB-V2.05-2017.06.28
Counter-clockwise rotation = Open
Figure 4: AB100 - AB500