Direction Of Rotation; Protection Devices; Electromechanical Protection Devices (Design Potentiometer Torque); Mechanical Protection Devices (Design Switch For Torque) - SCHIEBEL AB3 Operating Instructions Manual

Operating Instructions for Actuators Type AB with Control Unit
2 General OM-ENGLISH-ABCSC.V1.2-16xx-V2.02-2023.04.27

2.6 Direction of rotation

Unless specifically ordered otherwise, the standard direction is (see Figure 7 and Figure 8):
Counter-clockwise rotation = Open
Clockwise rotation = Close
Clockwise rotation of the actuator is given when the output shaft turns counter clockwise when looking on the
output shaft.
Figure 7: AB3 - AB80 Figure 8: AB100 - AB500
All data in these operating instructions refer to the standard rotating direction.

2.7 Protection devices

2.7.1 Electromechanical protection devices (design potentiometer torque)

The torque protection of the actuators with integral SMARTCON control unit is controlled mechanically by plate
springs which pass the current torque through a conductive plastic potentiometer to the control unit.
The switch off torque can be changed in the menu of the control unit for the left and right direction. The factory
default switch off torque is set to the ordered torque. If no torque was specified in the order, the actuator is
supplied from the factory with the maximum adjustable torque.
see Operating Instructions for SMARTCON Control Units

2.7.2 Mechanical protection devices (design switch for torque)

All actuators have at least one torque switch for clockwise and counter-clockwise rotation. These can be sep-
arately adjusted and are preset ex works to the torque required
NOTE: The adjusting screws are varnish-protected and must not be reset without prior consultation with the
Schiebel company.
However, the torque for the relevant rotating direction can be reduced by means of plastic cams on the torque
switch. Counter-clockwise rotation torque is reduced as follows: Using a screwdriver, turn the plastic cam
marked "L"in the direction of the decreasing scale markings (clockwise).
To reduce the clockwise rotation torque, turn the plastic cam marked "R"in the direction of the decreasing scale
markings (clockwise). See Figure 9.
Figure 9

2.7.3 Electrical protection devices

All motors have temperature switches as standard equipment (temperature sensors upon special order), which
are wired into the control and protect the motor from overheating.
In the housing of the connection plug super fast safety fuses are located the protect the integrated thyristors
8