Over-Current Protection
The amplifier also has circuitry to protect against over-current. If the total current from a set of 2 axes (ie A and B
or C and D) exceeds 30 A, the amplifier will be disabled. The amplifier will not be re-enabled until there is no longer
an over-current draw and then either SH command has been sent or the controller is reset. Since the AMP-43540
is a trans-conductance amplifier, the amplifier will never go into this mode during normal operation. The amplifier
will be shut down regardless of the setting of OE, or the presence of the #AMPERR routine.
NOTE: If this fault occurs, it is indicative of a problem at the system level. An over-current fault is usually due to a
short across the motor leads or a short from a motor lead to ground.
Over-Temperature Protection
The amplifier is also equipped with over-temperature protection.
If the average heat sink temperature rises above 80°C, then the amplifier will be disabled. The over-temperature
condition will trigger the #AMPERR routine if included in the program on the controller.
The amplifier will not be re-enabled until the temperature drops below 80°C and then either an SH command is
sent to the controller, or the controller is reset (RS command or power cycle).
A4 – AMP-435x0 (-D3540,-D3520) ▫ 234 DMC-40x0 User Manual
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