User manual

94
Version 2.4 (10/2011) en
Original instructions
Drum Motor
Installation
Electromagnetic Brake An electromagnetic brake fitted to the Drum Motor will be supplied with a DC
rectifier (unless a 24 VDC brake is supplied). The rectifier and brake must be
connected according to the connection diagrams (see chapter "Connection
Diagrams" of the respective series).
Cable length should be as short as possible and must have a wire cross section
according to national/international regulations so that the voltage supply at the
rectifier differs not more than ±2 % from the correct nominal voltage.
Hint
The rectifier has an input for AC-voltage and an output for DC-voltage to the
brake coil.
Damage to the Drum Motor and brake if both are
operating at the same time.
¾ Design control circuits so that the motor and the brake
never work against each other.
¾ Keep in mind, that depending on temperature and oil
viscosity there can be a reaction time up to 0.4 - 0.6
seconds to engage and release the brake.
¾ Do not engage the brake before power to the motor has
been switched off.
¾ Do not start the motor until the brake has been
released.
Hint
If the Drum Motor with Electromagnetic Brake option is used in an ambient
temperature less than +10 °C, special oil is required. Contact Interroll if in doubt.
Damage of the Drum Motor due to transience, radio or
other electrical interferences
¾ Position the rectifier within 2 meters of the brake.
¾ Screen the cable length separately for both AC and DC
supply voltages.
¾ Do not connect the rectifier to the motor star point when
the brake is used for a declined conveyor. This can
cause generated power overload to the rectifier and
brake windings.