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B-12
Interconnect Diagrams
Publication 1394-5.20 — July 2001
Brake Interconnect Diagrams
The relay outputs (Output 0-3) are linked to the Brake Enable/Disable
parameters to allow control of a motor brake for each axis. When an
axis is enabled, the configured output relay contact will close to
disengage the associated motor brake. At the same time, the axis will
command sufficient torque to hold the motor's position while the
brake is disengaging. The length of time that the axis will apply this
torque is set by the Brake Off Delay parameter for each axis. When an
axis is disabled and the motor has reached zero velocity, the
configured output relay contact will open to engage the associated
motor brake. At the same time, the axis will command sufficient
torque to hold the motor's position while the brake is engaging. The
length of time that the axis will apply this torque is set by the Brake
On Delay parameter for each axis. Refer to the 1394 SERCOS Interface
Integration Manual (publication 1394-IN024x-EN-P) for more
information).
Depending on the series of your 1394 axis module, your brake
circuitry may require isolation from the motor's conducted noise.
When using 1394 Series B axis modules, an isolated 24V DC power
supply and relay is recommended. 1394 Series C axis modules contain
an internal motor brake filter and do not require the isolation power
supply and relay. The Series C brake filter also contains a bi-
directional snubber diode to protect the user-supplied 24V DC brake
power supply.
The output relay contacts are rated to control a 24V
IMPORTANT
DC motor brake rated up to 1A. Motor brakes rated
greater than 1A require an additional relay or
contactor with sufficient rating to handle the higher
current.
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