Motortronics
Page 14
2.2 Fault Conditions
The “FAULT” LED will illuminate when any of the following conditions occur:
2.2.1
“Disabled”
The "DISABLED" mode is activated when the ABC Series receives a command on the Brake Disable input (a
N.O. dry contact at TB1) (see section 4.3.2). This mode can be used to remove the electronic brake from the
system, and is useful in applications that only require braking at certain times during the process and during
system setup. Note: The ABC Series is a "smart brake" and will sense a running motor and automatically arm
itself if released from the "DISABLED" mode. Under these circumstances, the ABC Series will go through the
"JOG" and "ARMED" sequence again. If the unit has determined the motor is stopped, the brake will return to the
normal ready state.
NOTE:
The ABC Series Mechanical Brake Release Relay will set the mechanical brake if the ABC Series
brake unit is disabled during the braking mode.
2.2.2
“Wiring Error”
The ABC Series unit will recognize when the interface connections or monitored signals are not correct with
respect to the proper operation sequence. If the brake detects a miswire or an improper sequence of events, it
will "self-disable" to prevent any conflicts with the existing systems and indicate "WIRING ERROR". If this
occurs, the "Fault" LED and "Wiring Error" LEDs will illuminate. Once the miswire or wrong sequence is
corrected, the brake will automatically enable itself and resume normal operation.
2.2.3
“Over Temp”
The ABC Series has thermal sensors built into the heat sink assembly. If the heat sink approaches temperatures
too high for the SCRs, the sensors will cause a Fault and illuminate the "Fault" and "Over Temp" LEDs.
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