Product type: PTC-resistor relay for dry transformer temperature monitoringPart numbers: T221717 (AC/DC 24–240 V), T221718 (AC 220–240 V)Rated supply voltage:AC/DC 24–240 V (AC 19–264 V, DC 20–297 V)AC 220–240 V ±10 %, 50/60 HzPower consumption: < 3 VAConnectable PTC resistors: 2 × 1…6 PTC according to DIN 44081/44082Switching threshold: < 4000 ΩOutput relays:1 × change-over contact (CO)1 × normally open contact (NO)Monitoring functions: Sensor short-circuit and break monitoring (activatable)Indicators: LEDs for ON, Alarm 1 and Alarm 2Control: Test button (delayed)Rated ambient temperature range: –20 °C to +55 °CHousing type: K-type, vertically arranged terminalsDimensions (approx): 75 × 22.5 × 110 mm (H × W × D)Mounting: 35 mm DIN rail or M4 screwsProtection rating: IP30 (housing) / IP20 (terminals)Weight: Approx. 110 g