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Operation and mechanisms
Ex (ROTORK-SCHISCHEK) Explosion proof (ATEX) motor
Explosion proof (ATEX) motor for different risk areas:• Zone 1/21: average risk of explosion >100h/year explosive environment• Zone
2/22: low risk of explosion <10h/year of explosive environment
1. access for manual resetting
2. thermo-electric tripping device (T)
3. switch S (selection of the running time)
1
2
3
Unlocking
∎
manual unlocking
: n.a.
∎
automatic unlocking
: as soon as the reaction temperature (72°C) of the thermo-electric tripping device is reached (Types EMEXT/
RMEXT).
∎
remote unlocking
: by interrupting the power supply.
Caution:
Selection of running time spring return: the running time of 3 or 10 sec. spring return is selected by wiring (see electrical
connection).
Resetting
∎
manual resetting
: use the delivered socket wrench, turn in slow motion and apply enough torque/force.
∎
motorised resetting
: supply the actuator (respect the prescribed voltage) for at least 60 sec. The resetting stops automatically.
Caution:
Selection of running time (resetting): place the switch (S) into the correct/selected position in accordance to the details below.
The selected parameter will work at next operation of the actuator. Adjustment can be done even without supply voltage.
3 sec./90°: S=00; 15 sec./90°: S=01; 30 sec./90°: S=02; 60 sec./90°: S=03; 120 sec./90°: S=04
If the motor is powered, turn the switch only if the actuator is not running !
Caution:
The mechanism may never be tested on its own, without being attached to the damper. Such a test might damage the
mechanism or the operator might be injured.