Motor Holding Brake Connection

A 24 V holding brake in the motor can be controlled directly by the drive. For proper function, check voltage drop, measure voltage at brake input and check brake function (on and off).

Brake voltage supply by using 24 V ±10% auxiliary voltage supply of the drive on X10. Minimum and maximum brake current see Electrical Data Brake output.

AKD2G offers motor brake outputs on connectors X1 and X2 X1, X2 and X4. The outputs can be mapped to the required axis with WorkBench.

Connector

Usable for

X1

Primary motor brake axis 1 or secondary brake for axis 2

X2

Primary motor brake axis 2 or secondary brake for axis 1

X4

Secondary motor brake axis 1, for single axis drives only Secondary Brake connector X4

No functional safety!

Serious injury could result when the load is not properly blocked. The internal brake function does not ensure functional safety.

  • Functional Safety can be ensured with configured SBC see "SBC (Safe Brake Control)" only.
  • For SIL 3 a second (external) motor brake for an axis is required. For single axis drives this brake can be connected to X4 Secondary Brake connector X4. For dual axis drives the additional brake must be controlled from another source (e.g. from the other axis or externally from a safety controller). The brakes can be mapped to an axis with WorkBench.
  • Functional safety, e.g. with hanging load (vertical axes), requires an additional brake, controlled e.g. from the other axis or externally from a safety controller. The brakes can be mapped to an axis with WorkBench.
  • The Hardware Enable does not initiate a controlled stop but switches off the power stage immediately.
  • Set parameter AXIS#.MOTOR.BRAKEIMM to 1 with vertical axes, to apply the brake immediately after faults or Hardware Disable.

Pinout X1 / X2

Pin

 Signal Description

B+

BR+

Brake positive line

B-

BR-

Brake negative line

Wiring

Usually the brake lines are part of Kollmorgen cable connections to X1 and X2 Single motor cable connection.

Functionality

The brake function must be enabled through a parameter. The diagram below shows the timing and functional relationships between the controlled stop signal, speed, and braking force. All values can be adjusted with parameters; values in the diagram are default values.

The drive speed setpoint is internally driven down an adjustable ramp (AXIS#.CS.DEC) to 0 V.

With default values the output for the brake is switched on when the speed has reached 5 rpm (AXIS#.ZEROV) for at least 6 ms (AXIS#.ZEROT). The rise (tbrH) and fall (tbrL) times of the holding brake that is built into the motor are different for the various types of motor.