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SAFETY INTERLOCK DIAGRAM
Figure 9-5:
Safety Interlock Circuit
•
The oven door and top cover Interlock sensor switches utilize three contactor sets; one set is
used to provide open/closed status to the MIO board CPLD. The other two sets of each sensor
switch report this status to the safety control relay.
•
The oven door sensor switch provides two cable connectors; P3 connector of cable 821698
interfaces switch status to the safety control relay.
•
The top cover sensor switch provides two cable connectors; P4 connector of cable 821698
interfaces switch status to the safety control relay.
•
Power (+24 VDC) to the safety control relay and dual contactors is provided by P5 of cable
821698.
•
Power (+48 VDC) to the dual contactors is provided by P22 of cable 821698 on the MIO board.
•
One contact set of each of the dual contactors utilize +24 VDC to feedback contactor status to
the safety control relay.
•
No calibration or periodic testing of the interlock relays is required.
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