www.baldormotion.com3-34 Basic Installation MN19433.7.6 Motor brake connectionYou might wish to wire a motor’s brake, via a relay, to a digital output on connector X3 (seesections 5.3.6 and 5.3.7). This allows the MotiFlex e100 to control the motor’s brake. A typicalcircuit is shown in Figure 19.CDfrom motor brakeconnectionsSeparatecustomersupplied24VDC supplyX33DOUT1-Relay+24VDC 0VThe inner shieldsurrounding thebrake wires shouldbe earthed/groundedat one point only.The relay has normally opencontacts and is shown deactivated(contacts open, brake engaged).15DOUT1+UsersupplyV+UsersupplyGNDFigure 19 - Motor brake control circuitThe 24 VDC power supply must be a separate supply as shown in Figure 19.Do not use the ‘user supply’ powering the MotiFlex e100 digital outputs, or theinternally generated 18 VDC supply. The brake wires often carry noise thatcould cause erratic drive operation or damage. The brake contacts must neverbe wired directly to the digital outputs. The relay and motor brake terminalsshould be fitted with protective flyback diodes, as shown in Figure 19.This circuit uses a special motor brake output, configured using MOTORBRAKEOUTPUT to appearon DOUT1. The operation of the motor brake output is synchronized with the application of powerto the motor and the enabling / disabling of the drive. Configurable delays are included to allowtime for the relay contacts and the brake to engage or release (see MOTORBRAKEDELAY in theMint help file). This system allows controlled operation of suspended or tensioned loads that areheld by the brake. For example:To engage the brake:H The motor is brought to rest under normal control, but remains powered;H The relay is deactivated, causing the brake to engage;H Power is removed from the motor;H The drive is disabled.To disengage the brake:H The drive is enabled;H Power is applied to the motor to hold position under normal control;H The relay is activated, causing the brake to be disengaged;H Motion starts.WARNING
