Virginia Controls, LLC MH-3000 User Manual, 1_03C10-VC Page 28
5.3 12VDC Power Supply
The 12VDC Power Supply supplies 12VDC for the microprocessor.
The Power Supply has onboard circuit protection. If the output is
shorted, the output will be turned off.
If the Power Supply output is 0 volts, remove the load from the
Power Supply, then measure the output again.
If the output is now 12VDC, check the load to make sure it is not
shorted.
NOTE: Output voltages below 12VDC may cause
erratic operation.
5.4 Safety Interface Board
The Safety Relay Interface may be provided as a printed circuit board, or as discrete
surface mounted relays, or a combination of both.
The Safety Relay Interface provides interface signals to the Motor Starter, Valves, Door
Operator, and Safety String.
Refer to the pictures below to see which type of interface is used.
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