Fireman switch for the connection to 4 MPP tracker. Suitable for remote disconnection of the DC side by the fire department. Max. string voltage Uoc: 1100V Integrated surge protection with class I+II combined arresters with signal contact. Suitable for protection against overvoltages in a photovoltaic system according to EN 51643-32. MPP1: 2 inputs, connection via WM4 C connector, compatible with cable type TÜV 2 Pfg1169/08.07 / EN 50618:2063 1 output, connection via WM4 C connector, compatible with cable type TÜV 2 Pfg1169/08.07 / EN 50618:2063 MPP2 to 4: identical to MPP1 DC fireman switch: Switching off by undervoltage triping. Switching off by reaching a temperature of 100°C in the housing. Automatic reconnection after the control voltage (230 V AC) is applied again. With signal contact. Connection of the fireman switch control line 230 VAC via cable glands (8-12mmØ) max. conductor cross-section: 1.5mm². Connection of the signal contact 24 VDC via cable glands (8-12mmØ) max. conductor cross-section: 1.5mm². Protection class: IP65. All built into a glas fibre reinforced polyester housing. Dimensions HxWxD: 346x400x132mm. Approval according to low voltage switchgear IEC 61439-1:2011 and EN 61439-2:2011