CSD Series Variable Frequency AC Drive
MOTORTRONICS
- 12 -
3.5 Brake Motor Magnetic Contactor
The CSD Series generates a variable voltage output. For this reason,
when using a brake motor with the drive, the brake power supply must
be connected directly to the AC line power. DO NOT take the power
from the drive output. A suitable surge absorber should be installed
across the brake coil to prevent transient surge when the coil is de-
energized. See wiring diagram (Fig. 3 - 3) for possible brake coil
connections. See section 3.5.1 for suggested values of snubber
components.
Figure 3 - 3
Brake Coil Connections
Brake
Coil
Coils can cause EMI (Electromagnetic interference). To minimize EMI,
Motortronics recommends that all coils be installed with surge
suppression components. For AC coil brakes, use an R-C snubber
type suppressor. For DC Coil Brakes use a diode type suppressor
(See Table 3 C and Figure 3 - 4 for details).
3.5.1 Coil Surge Suppression Wiring
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