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A modular intrusion detection system that includes a base unit having a primary intrusion detection device and a housing. The primary housing includes a base housing section and an outer cover. The base housing section includes a first mounting interface. A plurality of different secondary housing s

A modular intrusion detection system that includes a base unit having a primary intrusion detection device and a housing. The primary housing includes a base housing section and an outer cover. The base housing section includes a first mounting interface. A plurality of different secondary housing sections having a second mounting interface which can be attached to the first mounting interface of the base housing section are provided. The secondary housing sections may have a functional device, such as a CCD camera or a microphone, associated therewith. The camera or microphone may be activated to an alarm signal generated by the intrusion detection device. A plurality of different base units, each having an intrusion detection device, may also be provided wherein each of the base units is attachable to each of the secondary housings, and secondary devices associated therewith, to provide flexibility in assembling individual devices.

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What is claimed is: 1. A modular intrusion detection system, said modular system comprising: a base unit including a primary intrusion detection system component disposed within a primary housing, said primary housing defining a first mounting interface; and a plurality of intrusion detection modul

What is claimed is: 1. A modular intrusion detection system, said modular system comprising: a base unit including a primary intrusion detection system component disposed within a primary housing, said primary housing defining a first mounting interface; and a plurality of intrusion detection modules, each said module including a secondary intrusion detection system component and a secondary housing section, each said module having a unique capability, each of said secondary housing sections having a second mounting interface, each of said second mounting interfaces being engageably securable to said first mounting interface to thereby securably attach a selected one of said modules to said primary housing, whereby said base unit and a selected one of said plurality of modules may be selectively assembled into an operative detection system having selected capabilities. 2. The modular system of claim 1 wherein said primary housing includes a base housing section and a removable cover, said base housing section defining said first mounting interface, said removable cover comprising a first attachment feature; each of said secondary housing sections including a second attachment feature engageable with said first attachment feature wherein attachment of said removable cover to said base housing section engages said first attachment feature with said second attachment feature of the selected one of said secondary housing sections to secure said primary housing to one of said modules. 3. The modular system of claim 1 wherein one of said first and second mounting interfaces include at least one threaded opening for receiving a threaded fastener, said threaded fastener securing said secondary housing section to said primary housing. 4. The modular system of claim 1 wherein said first and second mounting interfaces are securable together with a snap-fit engagement. 5. The modular system of claim 1 wherein said primary intrusion detection system component generates an alarm signal and said at least one secondary intrusion detection module is couplable to said primary intrusion detection system component and wherein said secondary intrusion detection module is responsive to said alarm signal. 6. The modular system of claim 1 wherein said primary housing includes a primary terminal strip, said primary terminal strip being connectable to a security system and having a plurality of primary terminals, said primary intrusion detection system component including a plurality of conductive elements, each of said primary conductive elements being operably couplable with one of said plurality of primary terminals and wherein said at least one secondary intrusion detection module including a secondary terminal strip, said secondary terminal strip being connectable to said primary terminal strip and having a plurality of secondary terminals, said secondary intrusion detection module including a plurality of secondary conductive elements, each of said secondary conductive elements being operably couplable with one of said plurality of secondary terminals. 7. The modular system of claim 6 wherein said at least one secondary housing section defines an opening for passing wires from said primary terminal strip to said secondary terminal strip. 8. The modular system of claim 1 wherein one of said secondary intrusion detection system components comprises an image capturing device. 9. The modular system of claim 1 wherein one of said secondary intrusion detection system components comprises a microphone. 10. The modular system of claim 1 wherein one of said secondary intrusion detection system components comprises a light source. 11. The modular system of claim 1 wherein one of said secondary intrusion detection system components comprises a speaker. 12. A modular intrusion detection system, said modular system comprising: a base unit including a primary device disposed within a primary housing wherein said primary device is an intrusion detection component, said primary device generating an alarm signal upon detection of an intruder; and a plurality of intrusion detection modules, each said module including a secondary intrusion detection system component comprising one of an image capturing device, a microphone, a camera, a speaker, a light source, a microwave transceiver, and a passive infrared sensor, each said modules including a secondary housing section, each said secondary housing sections being selectively directly attachable to said primary housing, at least one of said secondary components responsive to said alarm signal generated by said primary device when said secondary module is coupled to said primary device. 13. The modular system of claim 12 wherein at least one of said secondary devices comprises an image capturing device. 14. The modular system of claim 12 wherein at least one of said secondary devices comprises a microphone. 15. The modular system of claim 12 wherein said primary housing defines a first mounting interface and each of said secondary housing sections defines a second mounting interface, each of said second mounting interfaces being engageably securable to said first mounting interface to thereby securably attach a selected one of said secondary housing sections to said primary housing. 16. The modular system of claim 15 wherein said primary housing includes a base housing section and a removable cover, said base housing section defining said first mounting interface, said removable cover comprising a first attachment feature; each of said secondary housing sections including a second attachment feature engageable with said first attachment feature, wherein attachment of said cover to said base housing section engages said first attachment feature with said second attachment feature of the selected one of said secondary housing sections which is securably attached to said primary housing section. 17. The modular system of claim 12 wherein said primary housing includes a primary terminal strip, said primary terminal strip being connectable to a security system and having a plurality of primary terminals, said primary device including a plurality of conductive elements, each of said primary conductive elements being operably couplable with one of said plurality of primary terminals and wherein each of said secondary housing sections includes a secondary terminal strip, said secondary terminal strips being connectable to said primary terminal strip and having a plurality of secondary terminals, said secondary system components each including plurality of secondary conductive elements, each of said secondary conductive elements being operably couplable with one of said plurality of secondary terminals. 18. A modular intrusion detection system connectable to a security system, said modular system comprising: a base unit including a primary device disposed within a primary housing, said primary device comprising an intrusion detection device, said primary housing including a primary terminal strip, said primary terminal strip being connectable to a security system and having a plurality of primary terminals, said primary device including a plurality of primary conductive elements, each of said primary conductive elements being operably couplable with one of said plurality of primary terminals; a plurality of secondary intrusion detection modules, each said secondary module including a secondary intrusion detection system component comprising one of an image capturing device, a microphone, a camera, a speaker, a light source, a microwave transceiver, and a passive infrared sensor, each said secondary modules being operably couplable to said primary device, each said secondary modules having a secondary housing section associated therewith, each said secondary housing sections being directly attachable to said primary housing section and having a secondary terminal strip, each of said secondary terminal strips being connectable to said primary terminal strip and having a plurality of secondary terminals, each of said secondary modules including a plurality of secondary conductive elements, each of said secondary conductive elements being operably couplable with one of said plurality of secondary terminals; and wherein a modular device is assembled by selecting one of said plurality of secondary modules, attaching said associated secondary housing section of said selected one of said secondary modules to said primary housing and coupling said selected one of said secondary modules to said primary device. 19. The modular system of claim 18 wherein at least one of said secondary modules comprises an image capturing device. 20. The modular system of claim 18 wherein at least one of said secondary modules comprises a microphone. 21. The modular system of claim 18 wherein one of said secondary modules comprises a light source. 22. The modular system of claim 18 wherein one of said secondary modules comprises a speaker. 23. The modular system of claim 18 wherein said primary device generates an alarm signal, said alarm signal being communicated to the security system and said selected secondary module, said secondary module being responsive to said alarm signal. 24. The modular system of claim 18 wherein said primary housing defines a first mounting interface and each of said secondary housing sections defines a second mounting interface, each of said second mounting interfaces being engageably securable to said first mounting interface to thereby securably attach a selected one of said secondary housing sections to said primary housing section. 25. The modular system of claim 24 wherein said primary housing includes a base housing section and a removable cover, said base housing section defining said first mounting interface, said removable cover comprising a first attachment feature; each of said secondary housing sections including a second attachment feature engageable with said first attachment feature wherein attachment of said cover to said base housing section engages said first attachment feature with said second attachment feature of the selected one of said secondary housing sections securably attached to said primary housing section.