Low voltage control module

• US 20060220460A1
• Filed: 03/31/2005
• Published: 10/05/2006
• Est. Priority Date: 03/31/2005
• Status: Abandoned Application

• Current Assignee: Kenall Manufacturing Company (Legrand SA)
• Original Assignee: Kenall Manufacturing Company (Legrand SA)
• Inventors: Quinn, Kenneth M., Grolmes, James M.
• Application Number:
  US11/095,016
• Publication Number:
  US 20060220460A1
• Time in Patent Office: Days
• US Class Current: 307/30
• CPC Class Codes: H05B 47/165 following a pre-assigned programmed sequence; Logic control [LC]
• CPC Class Codes: H05B 47/17 Operational modes, e.g. switching from manual to automatic mode or prohibiting specific operations

Abstract

A low voltage controller includes a circuit board having first and second lengthwise ends and having a high voltage input proximate the first end and a high voltage output proximate the second end, the high voltage input for receiving an AC high voltage, a voltage conversion circuit disposed on the circuit board between the first and second ends and including a step-down transformer, the voltage conversion circuit being structured for converting the AC high voltage to at least one DC low voltage, a power terminal, at least one load switch disposed on the circuit board and activated by use of the at least one DC low voltage for controllably switching the AC high voltage from the power terminal to a first output of the high voltage output, and a hot wire providing an electrical connection for transferring the AC high voltage from the high voltage input to the power terminal.

Claims

1. A low voltage controller comprising:

a circuit board having first and second lengthwise ends and having a high voltage input proximate the first end and a high voltage output proximate the second end, the high voltage input adapted for receiving an AC high voltage;

a voltage conversion circuit disposed on the circuit board between the first and second ends and including a step-down transformer, the voltage conversion circuit being structured for converting the AC high voltage to at least one DC low voltage;

a power terminal;

at least one load switch disposed on the circuit board and activated by use of the at least one DC low voltage for controllably switching the AC high voltage from the power terminal to a first output of the high voltage output; and

a hot wire providing an electrical connection for transferring the AC high voltage from the high voltage input to the power terminal.

2. The low voltage controller of claim 1 further comprising a control circuit disposed on the circuit board and adapted for connection to an external control switch, the control circuit structured for controlling operation of the load switch based on operation of the external control switch.

3. The low voltage controller of claim 2 further comprising the external control switch, the external control switch being adapted for DC low voltage operation.

4. The low voltage controller of claim 2 structured for controllably switching the AC high voltage from the power terminal to a second output of the high voltage output, wherein the control circuit is adapted for implementing state logic for the switching of the AC high voltage to the first and second outputs.

5. The low voltage controller of claim 4 wherein the high voltage output includes a third output and wherein the control circuit is adapted for implementing state logic for controllably switching the AC high voltage to any combination of the first, second, and third outputs.

6. The low voltage controller of claim 2 structured for controllably switching the AC high voltage from the power terminal to a second output of the high voltage output, wherein the control circuit is adapted for implementing combinatorial logic for the switching of the AC high voltage to the first and second outputs.

7. The low voltage controller of claim 1 wherein the control circuit is structured for obtaining an override signal and is programmable for disabling the load switch when the override signal is obtained.

8. The low voltage controller of claim 7 wherein the control circuit includes a timer for re-enabling the load switch after a predetermined time.

9. The low voltage controller of claim 1 wherein the voltage conversion circuit includes a filter capacitor and at least one voltage regulator.

10. The low voltage controller of claim 1 further comprising a resistor for obtaining a reduced AC voltage from the high voltage input and feeding the reduced AC voltage to a primary side of the step-down transformer.

11. The low voltage controller of claim 10 wherein the resistor comprises a metal oxide resistor disposed in series between the high voltage input and the step-down transformer.

12. The low voltage controller of claim 1 wherein the step-down transformer has an AC low voltage secondary voltage.

13. The low voltage controller of claim 1 wherein the high voltage input includes a high voltage input connector, the low voltage controller further comprising a case for enclosing the circuit board and hot wire, the case having an input opening adapted for accessing the high voltage input connector.

14. The low voltage controller of claim 13 wherein the case includes an input end face angled to provide both horizontal and vertical access to the high voltage input connector.

15. The low voltage controller of claim 14 wherein the high voltage input connector does not extend outside the case.

16. The low voltage controller of claim 1 wherein the high voltage output includes a high voltage output connector, the low voltage controller further comprising a case for enclosing the circuit board and hot wire, the case having an output opening adapted for accessing the high voltage output connector.

17. The low voltage controller of claim 16 wherein the case includes an output end face angled to provide both horizontal and vertical access to the high voltage output connector.

18. The low voltage controller of claim 17 wherein the high voltage output connector does not extend outside the case.

19. The low voltage controller of claim 1 wherein the circuit board has top and bottom component placement surfaces, the low voltage controller further comprising a case for enclosing the circuit board and hot wire, the case having a bottom plate, an insulating layer disposed on a top surface of the bottom plate, and a top cover adapted to be snugly secured to the bottom plate along a perimeter thereof, and wherein the insulating layer is structured for electrically insulating the bottom component surface of the circuit board from the bottom plate.

20. The low voltage controller of claim 1 further comprising a remote control input for obtaining a signal representing an external selection event, and a sequencer that receives the signal and steps the load switching according to a state program.

21. The low voltage controller of claim 20 wherein the sequencer is structured for being user-programmable.

22. A low voltage controller for switching a high voltage load comprising:

a case having approximate dimensions of 9.5 inches overall length, 1.72 inches width, and 1.14 inches height, the case having a mounting location proximate each lengthwise end and an approximate distance of 8.91 inches between the mounting locations;

a circuit board disposed within the case;

an input for receiving a first AC high voltage;

a step-down transformer mounted on the circuit board and structured for stepping a second AC high voltage down to an AC low voltage, the second AC high voltage being obtained from the first AC high voltage;

a voltage converter mounted on the circuit board and operative to convert the AC low voltage to a DC low voltage;

a relay for on/off switching of the first AC high voltage to an external load; and

a control circuit powered by the DC low voltage, having a control input structured for obtaining a DC low voltage control signal, and structured for controlling the on/off switching of the relay based on the DC low voltage control signal.

23. The low voltage controller of claim 22 further comprising a voltage-dissipating resistor disposed in series between the first and second AC high voltages, wherein the first AC high voltage is approximately 277 VAC, the second AC high voltage is approximately 230 VAC, and a voltage being dissipated across the voltage-dissipating resistor is approximately 47 VAC.

24. The low voltage controller of claim 22 wherein the case includes an input end face angled to provide both horizontal and vertical access to the input.

25. The low voltage controller of claim 22 further comprising a high voltage output connector for connecting the relay to the external load, wherein the case includes an output end face angled to provide both horizontal and vertical access to the high voltage output connector.

26. The low voltage controller of claim 22 further comprising a voltage selector for configuring the input according to a particular voltage being used as the first AC high voltage.