Security System

A security system includes a central control and a number of security controllers, each of which includes a removable and replaceable security control module. Each module is interchangeable with other modules. Each controller includes a housing within which the module is contained. Cables from security-controlled components extend into the interior of the housing and are removably connected to the module. Each module includes a first connector for connection in a communication system and a second connector for receiving inputs from and providing outputs to a security component controlled by the controller. Each module further includes a third connector for receiving inputs from or providing outputs to an auxiliary device other than the security component. The auxiliary device provides an input to the controller or receives an output from a controller independent of the security component. Each controller also includes an accelerometer for providing a tamper evident feature.