Technical Data Supply voltage 220V AC Voltage tolerance AC: +10% / -15% Voltage tolerance DC: 15% Power Consumption: 4.5VA Output relays: 240V/5A Operating temperature: -20C to +65C Storage temperature: -40C to +85C Frequency range: 20 kHz to 170 kHz Reaction time: 10ms Signal holding time: Unlimited / limited when loop is permanently covered 10 minutes Sensitivity: Adjustable in 4 increments Loop inductance: Total loop plus connection wiring: 50H to 1000H. Ideal is 100H to 300H Loop connection wiring: Maximum length 20 meters, twisted at least 20 times per meter Size of Housing: 78x40x108 mm (L x W x H)