System Manual – MOVIDRIVE® compact Drive Inverters
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Connecting AC brake motors
Project Planning
4.9
Connecting AC brake motors
For detailed information about the SEW brake system, refer to the "Gearmotors" cata-
log, which you can order from SEW-EURODRIVE.
SEW brake systems are disc brakes with a DC coil that release electrically and brake
using spring force. A brake rectifier provides the brake with DC voltage.
Disconnecting
the brake rectifier
The brake rectifier can be switched off, causing the brake to be applied, in two ways:
1. Cut-off in the AC circuit
2. Cut-off in the DC and AC circuit (faster disconnection)
Always disconnect the brake in the DC and AC circuits in:
•
All hoist applications
•
In the operating modes CFC (MCV, MCH) and SERVO (MCS, MCH).
Activating the
brake
Always activate the brake via DBØØ; do not use the PLC!
The binary output DBØØ '/Brake' is configured as an output for operating a relay with a
control voltage of +24 V / max. 150 mA / 3.6 W. This means a power contactor can be
controlled directly with a DC 24 V coil voltage. This power contactor is used for switching
the brake.
The startup function in the DBG11B keypad and in the MOVITOOLS
®
operating soft-
ware is used to set the brake parameters for 2 and 4-pole SEW motors. The brake
parameters (P73_) must be set manually for SEW motors with a higher number of poles
and non-SEW motors.
Brake parameters
NOTE
The brake rectifier must have a separate supply system cable for inverter operation.
Supply via the motor voltage is not permitted!
NOTE
The brake parameters are adapted to the brake activation arrangement shown in the
wiring diagram. If the values set for the brake release and application times are too
short, e.g. for long response times in the brake control system, hoists, for example, may
sag.
Summary of Contents for MOVIDRIVE compact MCH41A
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