| 摘要 |
An electric or electronic time tolerance control unit for control devices incorporating two or more parallel or redundant control circuits (10, 20). The time tolerance control unit has an output compare circuit (40) which includes a time tolerance circuit whereby a selected time delay is provided before an error signal is generated or a specific action is activated if one of the control circuits provides an output signal different than that of another of the control circuits. The time tolerance may be varied by varying the capacitance of a capacitor (52) which is connected in parallel with a relay coil (50) of a tolerance relay. The device may be operated with electromechanical relays or solid state circuitry. |
