Three-zone CO detection system, mounted in ABS plastic casing, with possibility of recessed mounting. Each module allows connection of up to 32 detectors connected to 2 wires without polarity, with a maximum distance of 1 km. The system has three programmable level relays, extraction 1 and extraction 2 and alarm. The relays can be configured to be activated with a fault. The system of algorithms has two operation types, standard or by line sensing.The system has a test mode for maintaining the installation. Optionally, the system can incorporate the cards FM-TC500 or FM-TC501, which allow you to control a speed regulator connected to a motor, making energy savings. Dimensions 439 x 268 x 112.