Request to exit two-wire control module

• US 10,026,247 B2
• Filed: 07/05/2016
• Issued: 07/17/2018
• Est. Priority Date: 07/06/2015
• Status: Active Grant

• Current Assignee: Hanchett Entry Systems Incorporated (Assa Abloy AB)
• Original Assignee: Hanchett Entry Systems Incorporated (Assa Abloy AB)
• Inventors: Anderson, Eric
• Primary Examiner(s): SYED, NABIL H
• Application Number:
  US15/202,169
• Publication Number:
  US 20170092029A1
• Time in Patent Office: 742 Days
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 2219/2628 Door, window
• CPC Class Codes: G07C 9/30 not involving the use of a pass
• CPC Class Codes: H01H 9/00 Details of switching devices, not covered by groups H01H1/00 - H01H7/00

Abstract

A REX activation detection and control module system configured to allow a REX device having at least four connectors to electrically connect with ACS devices having at least four connectors, while only connecting two wires to the REX device. The system comprises a first REX input/output device comprising two couplings and a second REX input/output device comprising at least four couplings. The system also comprises a current sense amplifier electrically connected to the first REX input/output device, the current sense amplifier configured to measure current from either the first REX input/output device. The system also comprises a microcontroller electrically connected to the current sense amplifier, the microcontroller configured to monitor the rolling average of the measured current output from the current sense amplifier. When the microcontroller detects an anomaly within the rolling average of the measured current, the microcontroller will activate the relay.

Claims

1. A request to exit (REX) activation detection and control module system configured to allow a REX device having at least four connectors to electrically connect with Access Control System devices having at least four connectors while only connecting two connectors to said REX device, said system comprising:

a) a first REX input/output device comprising two couplings;

b) a second REX input/output device comprising at least four couplings, said second REX input/output device electrically connected to a relay;

c) a current sense amplifier electrically connected to said first REX input/output device, said current sense amplifier configured to measure current from said first REX input/output device;

d) a microcontroller electrically connected to said current sense amplifier, said microcontroller configured to monitor the rolling average of the measured current output from said current sense amplifier, said microcontroller connected to said relay; and

wherein when said microcontroller detects an anomaly within the rolling average of the measured current, said microcontroller will activate said relay.

2. A system in accordance with claim 1 wherein said system is located on a first side of a door frame.

3. A system in accordance with claim 1 wherein said relay is a Form C contact relay comprising:

a) a transistor electrically connected to said microcontroller;

b) a combination contact having a Normally Open-Common-Normally Closed (NO-C-NC) configuration set to default in the NC position, said combination contact electrically connected to said transistor; and

wherein said microcontroller toggles said combination contact to the NO position via said transistor.

4. A system in accordance with claim 2 further comprising a REX detector located on a second side of a door frame, said REX detector configured to send a signal to said first REX input/output device so as to create the anomaly within the rolling average of the current output.

5. A system in accordance with claim 1 further comprising a fused protector electrically connected to both said second REX input/output device and said current sense amplifier, said fused protector configured to cutoff power to said system when the voltage output from said first and/or said second REX input/output device exceeds a maximum threshold.

6. A system in accordance with claim 1 further comprising a programming port configured to allow a user to upload system instructions into said microcontroller.

7. A system in accordance with claim 1 further comprising a plurality of LED indicators configured to indicate the operational status of said system.

8. A system in accordance with claim 1 further comprising an EMI Filter configured to substantially remove electromagnetic induction and/or electromagnetic radiation disturbances in said system.

9. A system in accordance with claim 1 further comprising a power supply circuit configured to supply power to said microcontroller and said current sense amplifier.

10. A request to exit (REX) activation detection and control module system configured to allow a REX device having at least four connectors to electrically connect with Access Control System devices having at least four connectors while only connecting two connectors to said REX device, said system comprising:

a) a first REX input/output device comprising two couplings;

b) a second REX input/output device comprising at least four couplings, said second REX input/output device electrically connected to a Form C contact relay;

c) a current sense amplifier electrically connected to said first REX input/output device, said current sense amplifier configured to measure current from said first REX input/output device;

d) a microcontroller electrically connected to said current sense amplifier, said microcontroller configured to monitor the rolling average of the measured current output from said current sense amplifier, said microcontroller connected to said Form C contact relay, wherein when said microcontroller detects an anomaly within the rolling average of the measured current, said microcontroller will activate said Form C contact relay;

e) said Form C contact relay comprising;

i) a transistor electrically connected to said microcontroller;

ii) a combination contact having a Normally Open-Common-Normally Closed (NO-C-NC) configuration set to default in the NC position, said combination contact electrically connected to the collector of said transistor; and

wherein said microcontroller toggles said combination contact to the NO position upon sending current to the base terminal of said transistor;

f) a REX detector configured to send a signal to said first REX input/output device so as to create the anomaly within the rolling average of the current output;

g) an EMI Filter configured to substantially remove electromagnetic induction and/or electromagnetic radiation disturbances in said system; and

h) a plurality of LED indicators configured to indicate the operational status of said system.

11. A system in accordance with claim 10 wherein said system is located on a first side of a door frame and said REX detector is located on a second side of the door frame.

12. A system in accordance with claim 10 further comprising a fused protector electrically connected to both said second REX input/output device and said current sense amplifier, said fused protector configured to cutoff power to said system when the voltage output from said first and/or said second REX input/output device exceeds a maximum threshold.

13. A system in accordance with claim 10 further comprising a programming port configured to allow a user to upload system instructions into said microcontroller.

14. A system in accordance with claim 10 further comprising a power supply circuit configured to supply power to said microcontroller and said current sense amplifier.

15. A method of electrically connecting a request to exit (REX) detector having at least four connectors to devices having at least four connectors while only connecting two connectors to the REX detector via a REX activation detection and control module system, wherein said REX activation detection and control module system includes:

a) a first REX input/output device comprising two couplings;

b) a second REX input/output device comprising at least four couplings, said second REX input/output device electrically connected to a relay;

c) a current sense amplifier electrically connected to both said first REX input/output device and said second REX input/output; and

d) a microcontroller electrically connected to said current sense amplifier, the method comprising the steps of;

i. providing a REX detector having two connectors;

i. connecting the REX detector to said first REX input/output device;

ii. delivering a current to said current sense amplifier;

iii. measuring the delivered current via said current sense amplifier;

iv. monitoring the rolling average of the measured current output from said current sense amplifier via said microcontroller;

v. delivering a signal to said current sense amplifier so as to create an anomaly within the rolling average of the measured current; and

vi. activating a relay upon detection of the anomaly by said microcontroller.

16. A method of electrically connecting REX detector of claim 15 wherein the current delivered to said current sense amplifier is output from said first REX input/output device.

17. A method of electrically connecting REX detector of claim 15 further comprising the step of cutting off power to said system via a fused protector when the voltage output from said first and/or second REX input/output device exceeds a maximum threshold.

18. A method of electrically connecting REX detector of claim 15 further comprising the step of removing electromagnetic induction and/or electromagnetic radiation disturbances in said system via an EMI Filter.

19. A method of electrically connecting REX detector of claim 15 further comprising the step of indicating the operational status of said system via a plurality of LED indicators.