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Epsilon Eb and EN Drives Reference Manual
Brake Operation
Motor brake operation is controlled by the Brake Release and Brake Control input functions.
These input functions can be used together to control the state of the Brake output function.
The table below shows the relationship between the Brake input and Brake output functions.
Note
No motion should be commanded while the brake is engaged.
* Eng=Mechanically Engaged
Diseng=Mechanically Disengaged
Brake Release Input Function
The Brake Release input function will release the brake under all conditions. When this input
function is "On", the Brake output function will be "On" (i.e., release brake). This input
function overrides all other brake control, thus allowing the brake to be released while a fault
is active or the power stage is disabled. See also Brake output function.
Brake Control Input Function
This input function, when active, will engage the brake unless overridden by the Brake
Release input function. This input lets you externally engage the brake while allowing the
drive to also control the brake during fault and disabled conditions.
Brake Output Function
The Brake output function is used to control the motor holding brake. If the Brake output
function is "Off", the brake is mechanically engaged. When the brake is engaged, the
diagnostic display on the front of the drive will display a “b”.
The drive outputs are limited to 150 mA capacity, therefore, a suppressed relay is required to
control motor coil. Control Techniques offers a relay, model BRM-1.
Brake
Release
Input
Off
On
Brake
Control
Input
On
Off
On
Off
Drive
Power
Stage
Enabled
Disabled
Enabled
Disabled
Enabled
Disabled
Enabled
Disabled
Brake
Output
Off
Off
On
Off
On
On
On
On
Brake*
Eng
Eng
Diseng
Eng
Diseng
Diseng
Diseng
Diseng
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