Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Patent
1999-02-11
2000-06-13
Sherry, Michael J.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
361167, 361170, 361191, 307115, 307132V, H01H 4700
Patent
active
06075690&
ABSTRACT:
A system and method for controlling relays. The method may comprise receiving one or more input commands for a plurality of relays, with the plurality of relays including a first relay, and a last relay, initiating actuation of the first relay after receiving the input relay commands, and initiating actuation of the last relay after initiating actuation of the first relay. Initiating actuation of the last relay does not wait for a debounce of the first relay. The method waits a debounce period after initiating actuation of the last relay. The debounce period operates to debounce the last relay and the first relay. One or more second relays may also be included in the debounce sequence. The relays may be latching or non-latching relays. The method may determine if another relay is required to be actuated after initiating actuation of each relay. One of the input commands may include a debounce mode input. A delayed debounce mode debounces the plurality of relays only after the last relay has been actuated. An immediate debounce mode debounces each relay immediately after the relay has been actuated. The system comprises one or more relay drivers coupled to relay control logic, with optional relays coupled therebetween. The relay control logic is operable to receive input commands for the relays, to initiate actuation of the relays without waiting for a debounce of the previous relay. The relay control logic waits a debounce period after initiating actuation of the last relay. The debounce period operates to debounce the last relay and the first and second relays.
REFERENCES:
patent: 3866092 (1975-02-01), Burns
patent: 4028591 (1977-06-01), Kahn et al.
patent: 5329417 (1994-07-01), Kniepkamp et al.
patent: 5673165 (1997-09-01), Kuhn et al.
HP E1460A Relay Multiplexer User's Manual, Hewlett-Packard Corp., Nov. 1995 .
Hormuth Robert W.
Kovner Scott B.
Runyan Cory A.
Tyler Brian M.
Hood Jeffrey C.
Iselin Louis H.
National Instruments Corporation
Sherry Michael J.
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