Manufacturer: ZIEHL industrie-elektronik GmbHModel / Type: MSF220KArticle No.: T221718 (AC 220-240 V version)Device Type: PTC-resistor Thermistor Relay for Dry TransformersSupply Voltage: AC 220 – 240 V ± 10 %, 50/60 Hz, ≤ 2 VAAlternate Supply Range (for related versions): AC/DC 24-240 V (not T221718 version)PTC Inputs: 2 × 1…6 PTC resistors according to DIN 44081/44082Switching Threshold: < 4000 ΩOutput Relays:
• 1 × change-over contact (CO)
• 1 × normally-open contact (NO)Sensor Monitoring: Short-circuit and break monitoring (activatable)Test Function: Test button (delayed)LED Indicators: ON, Alarm 1, Alarm 2Housing: K-type housing, vertically arranged terminals, 22.5 mm wideMounting: 35 mm DIN rail or with M4 screwsAmbient Temperature Range: −20 °C … +55 °CDimensions (H × W × D): 75 × 22.5 × ~110 mmProtection Class: IP 30 (housing) / IP 20 (terminals)Weight: Approx. 110 g