6.1.5
Use at ambient temperatures below -20 °C
The rotary drives are equipped with integrated, regulated heating for use at ambient temper-
ature down to -40 °C. The heating is supplied automatically when there is a constant voltage
supply to terminals 1 and 2.
1.
Once the rotary drive is installed, it must be connected to the electrical system immedi-
ately.
2.
The heating switches on automatically if the rotary drive reaches an internal temperature
of -20 °C. It warms the rotary drive up to operating temperature then switches off auto-
matically. The rotary drive will not move during this heating up phase.
3.
Actuation and standard function are only ensured after this heating up period.
6.1.6
Excessive temperatures
Based on the ATEX Ex regulations, rotary drives must be protected against excessive temper-
atures with respect to the temperature class. This is done via an internal thermostat, which
acts as a maximum threshold limiter and, if a fault occurs, will permanently turn off the
rotary drive in the event of inadmissible temperatures. An upstream temperature sensor en-
sures the rotary drive is switched off before this point in the event of an operating error. This
safety function is reversible, so the drive is operational again once it has cooled down. How-
ever, the fault must be remedied on-site immediately!
6.1.7
Synchronous operation
It is not permitted to have multiple rotary drives on one axle connection or mechanically con-
nected rotary drives.
6.1.8
Mechanical protection (only F1/F3 types)
The rotary drives must be operated with a minimal external load.
Type
Minimal load
torque [Nm]
ExMax-8-F1 (CTS, VAS), ExMax-8-SF1 (CTS, VAS), ExMax-8-BF1 (CTS, VAS)
2
ExMax-15-F1 (CTS, VAS), ExMax-15-SF1 (CTS, VAS), ExMax-15-BF1 (CTS, VAS)
5
ExMax-30-BF3 (CTM), ExMax-30-F3 (CTM, VAM), ExMax-30-SF3 (CTM, VAM)
8
ExMax-50-BF3 (CTM, VAM), ExMax-50-F3 (CTM),ExMax-50-SF3 (CTM, VAM)
15
6.1.9
Power outage
In the event of a power outage, first the spring return is operated. When the mains supply is
restored, a new reference run will be triggered automatically. This means, the rotary drive
goes to the CLOSED position then, depending on activation, the rotary drive goes to the
OPEN position.
6 | Operation
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Translation of the original installation guide · Version 1.0 · 2021-05-27