Patent ID: 6771179
Filing Date: 2004-08-03
Classification: G07B

Abstract:
A security module comprising:a plurality of functional units mechanically and electrically mounted on a printed circuit board; a casting compound surrounding at least a part of said printed circuit board with said functional units thereon, leaving a portion of said printed circuit board free of said casting compound; battery contact terminals on said portion of said printed circuit board free of said casting compound; battery releasably connected to said battery contact terminals; a first contact group on said printed circuit board for communication with an external device and a second contact group on said printed circuit board for supplying said functional units with a system voltage; a signal element, selected from the group consisting of optical signaling elements and acoustical signaling elements, connected to one of said functional units for signaling a security module status with a signal that is perceptible outside of said casting compound; and said functional units including a unit for identifying when a voltage of said battery falls below a predetermined threshold and thereupon activating said signal element, only when said printed circuit board is supplied with said system voltage.