Security module.

A security system including a security module (10)positioned so that personnel traveling from a first zone to a second zone pass through the module for identification and verification of access. The module includes a card reader (30) on one wall (14) for reading an identification card inserted by the personnel, a scale (22,60,48,50) for weighing personnel within the module, sensors (130-139) for measuring the height, girth, position and direction of movement of personnel passing through the module, and video cameras (98) for viewing such personnel. Information relating to whether the card is used properly, whether the card is correct and valid, whether issued to the person carrying the card and whether the person should be traveling between the zones at that time is determined and alerts (146,150) provided when violations occur. The scale includes a floor plate (22) suspended within the module. The sensors are infrared detectors connected within panels (12,14) forming the interior walls of the module which are removably connected to the frame of the module by rods (92) carried by the frame and selectively rotatable for receipt and locking within slots (82) in brackets (76) secured to the panels. Video cameras are concealed within end caps (20) at the entry and exit ends of the wall on which the card reader is mounted and unobtrusively view personnel through one-way mirrors (116).