ELEVATOR SAFETY CIRCUIT
First Claim
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1. An elevator safety circuit comprising:
- a plurality of relays;
safety logic for monitoring status of the plurality of relays, the safety logic generating an output signal in response to the status of the plurality of relays; and
a processor controlling operation of an elevator drive in response to the output signal;
wherein at least one of the relays is a forced guided relay and at least one of the relays is other than a forced guided relay.
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Abstract
An elevator safety circuit includes a plurality of relays; safety logic for monitoring status of the plurality of relays, the safety logic generating an output signal in response to the status of the plurality of relays; and a processor controlling operation of an elevator drive in response to the output signal; wherein at least one of the relays is a forced guided relay and at least one of the relays is other than a forced guided relay.
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Citations
14 Claims
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1. An elevator safety circuit comprising:
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a plurality of relays; safety logic for monitoring status of the plurality of relays, the safety logic generating an output signal in response to the status of the plurality of relays; and a processor controlling operation of an elevator drive in response to the output signal; wherein at least one of the relays is a forced guided relay and at least one of the relays is other than a forced guided relay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification