Head office of gas detection. The head office realizes the measure of inflammable and / or toxic gases and / or detects the absence of oxygen, depending on the transmitter connected to her. Designed, made and certificate in conformity with procedure IN 60079-29-1, IN 45544-1, IN 45544-3 and IN 50104. Certificate ATEX the IInd 3 G. Display retroiluminado of 4 lines, with indicator of the value of measure, messages, alarms and with a graphical warning bar of the concentration of the gas to analyzing in ppm. 3 programmable levels of alarm. 12 exits of relay included in the head office, for each of the levels of alarm for channel, for the connection of sirens and for general breakdown of the system with capacity for maneuvers to 230V / 5A. Connection for bus RS-485. Supply to 230V. I consume: 45W / 200 mA. Protection degree IP54.