Power supply 230V AC - separate for high and for overfill
Alarm units for alarm indication - up to 8 alarm points For more than eight points, more units can be used, with common control buttons (electricaly separated contacts for high and for overfill) and power failure battery
Power and Input/output units for power supply and external signaling devices (flashing lights and air siren) connection: N.C. voltage-free output contacts for common and power failure alarm included
Intrinsic safety isolators for magnetic level switches connection. Magnetic level switches connection cables are fully controlled (short circuit, line break, resistance)