Brake Resistor - Pilz PMCprotego D.48 Operating Manual

Function Description
Safe actuation of the motor holding brake
Safe actuation of the holding brake also requires
} The N/O contact or safe semiconductor output from a safety relay within the braking cir-
cuit.
} A suppression device (e.g. varistor or flywheel diode).
One of the safety cards PMCprotego S1-2 or PMCprotego S1-2-C can also be used for
safe actuation of the motor holding brake.
Wiring suggestion:
Fig.: Safe motor holding brake
R1: Suppression device
S1: N/O contact from a safety relay
4.2.4

Brake resistor

When the servo motor is braked, energy is fed back to the servo amplifier. This means that
the capacitors in the intermediate circuit are charged at higher voltages. The servo amplifier
switches the brake resistor to the intermediate circuit via the brake chopper. The brake res-
istor converts the braking energy into heat.
The servo amplifier PMCprotego D has no integrated brake resistors. External brake resist-
ors may be connected.
Setting the parameters
The thresholds for connecting the brake resistor to the mains voltage of the servo amplifier
are adjusted in the commissioning software (PASmotion).
Our Customer Support team can help you calculate the brake power you will need for your
plant.
Single-axis or multi-axis systems
} Single amplifier
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Operating Manual PMCprotego D.48, PMCprotego D.72
1001735-EN-04
If the power regenerated from the motor is greater than the set brake power (as an
average over time or as a peak value), a message will appear (see section entitled
"Messages/Errors").
The servo amplifier detects overvoltage on the intermediate circuit. The power ele-
ment shuts down. The following error message appears: "F02: Overvoltage".
The relay contact for operational readiness, BTB/RTO, opens.
A
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