Note: External units require separate power sources (can not be powered by the AutroSafe detector loop). There is no current limiting/protection in the unit; this must be supported by the power source.
The 24 V power input (terminal 5 and 6) is monitored and a fault message is given at voltages < 20 V. In this situation the FAD output (terminal 7 and 8) will not be activated.