The power unit provides 12 Vdc / 2.3 A to supply the E-bus as well as the 4 separately fused 12 Vdc outputs. A programmable 48 V, 5 A changeover relay is also available. The power supply, battery and fuses are monitored. A failure is signaled to the control panel via the E-bus.

 The housing provides space for a 12 V / 27 Ah battery and 4 SMT11 / SMR11 boards and 2 SMX13 modules.