FireClass BXM24/50-U - EN54 Power Supply Unit - 508.031.745The BXM24 25 U and 50 U are approved by IMQ to EN 54 4: 1997 + A1: 2002 andEN60950 1: 2001. The steel housing contains a 2. 5 amp or 5 amp switch modepower supply and monitoring board and has space to accommodate 2 x 12V 17Ahsealed lead acid batteries. The 10 front panel LEDs comprehensively indicate the status of the unit. Robust metal housing. Twin fused outputs. Temperature compensated charging. Deep discharge protection of batteries. Fault relay