Kidde Airsense EN54-4 Approved 24v 5A 1.6A Intelligent Power Supply The 9-30842 is a fully featured EN54-4 approved power supply ideal for use in fire system applications. It features intelligent battery charging, monitoring and signalling. Regulated 24 VDC output will source up to 5 A into the load as well as providing up to 1.6 A for charging the standby batteries. The load output features full electronic short circuit protection under both mains and standby battery operation. Maximum battery life is assured through continuous active battery monitoring and 3 different charge levels bulk (fast charge), absorption and temperature compensated float. Deep discharge protection prevents premature battery failure when operating from standby for extended periods. Inside the unit, a diagnostic led with various flash patterns, ensure accurate diagnostics when the unit is in fault.