Generic brake output voltage

Overview

The voltage output of the brake can be controlled manually in real-time using the ‘manual output voltage’ mode of the brake release object.

Note: The brake release object can be used for either controlling a brake or a generic voltage but not both.

This allows for custom brake release strategies on the master, as well as providing a generic output for a single phase device connected to this phase (e.g. a fan).

This voltage is applied at

• Phase D of SOMANET Node

• SBC out of SOMANET Node Safety

Attention: The brake output can be switched off safely when SOMANET Node Safety is used but not controlled safely.

Usage

• Connect the device to the dedicated brake output of the drive and to Ground (GND).

• Set object ‘Brake options: Release strategy’ (subitem 0x2004:4) to ‘Manual output voltage’ (0), it is recommended to do so in ‘Brake Configuration’ of the Setup Wizard of OBLAC Drives.

• Use the SDO object ‘Brake options: Brake status’ (subitem 0x2004:7) for switching the output on and off:

  1: off

  2: on

• In the master assign ‘Brake options: Output voltage’ (subitem 0x2004:10) to PDO for controlling the output voltage in real-time, the unit is given in mV.

• While the master is running, control the output voltage by writing the value in mV to ‘Output voltage’.

• To turn off the output, write a 0 to ‘Output voltage’

Note: The SBC signal has to be provided as well when the voltage shall be switched on with Node Safety.

Limitations

• Please note that the brake phase voltage control comes with limited accuracy.

• Use this feature only in low precision applications (e.g. load-dependant speed of a fan).

Parameters

Object ID	Name	Description
0x2004	Brake Release	Subitem 0x2004:4 (Release strategy) can be used to activate the voltage on the brake output Subitem 0x2004:7 (Brake status) turns it On and Off Subitem 0x2004:10 (Output voltage) sets the voltage.