The fan module is designed for vertical ventilation of a sub rack or desktop case. Modules for depths of 160 mm and 220 mm have 3 fans. These are arranged in an optimum configuration to ensure cooling of the printed PCBs over the entire width of the rack.Fan modules with 84 HP front panels (with on/off switch) are for mounting in withdrawable units and desktop cases acc. to DIN 41494, part 5, being run in and out on card guides. An AMP socket is used for the mains connection.