MTS FlexTest Models 200 - Manual (Page 232)

MTS FlexTest® Models 40/60/100/200 Controller Hardware
Model 494.33 Digital I/O Power Supply
Digital I/O and Transition Boards 232
Overtemperature Reset—Model 494.33 DI/O Power Supply
The Model 494.33 DI/O Power Supply includes an overtemperature circuit.
This circuit removes all power outputs if the internal temperature is too high.
Important You should develop an overtemperature reset procedure
based on a risk assessment for your system.
Reset procedure Perform the following procedure to reset the overtemperature circuit and
restore DC power output:
1. If required, shut down system hydraulics.
2. Switch the Power switch on the front of the power supply to the off
position.
3. Determine the cause of the overtemperature condition (blocked filter,
damaged fans, inadequate ventilation clearance) and fix the problem.
4. If required, check the controller input/output status to make sure that
they are set to a safe state.
5. Switch the Power switch on the front of the power supply to the on
position.
Switching the power switch off and then on resets the overtemperature
circuit.
Resetting the overtemperature circuit restores power to digital input
and output (DI/O) devices. Resetting the overtemperature circuit can
result in unexpected actuator movement and unexpected operation of
DI/O devices.
Unexpected actuator movement and operation of DI/O devices can
result in injury to personnel or damage to the equipment.
Determine the cause of the overtemperature condition and fix the problem.
Follow an overtemperature reset procedure that is based on a risk
assessment that you performed for your site.
ON OFF
WARNING