Manufacturer: ZIEHL industrie-elektronik GmbH
Model / Type: MSF220K
Article No.: T221718 (AC 220-240 V version)
Device Type: PTC-resistor Thermistor Relay for Dry Transformers
Supply Voltage: AC 220 – 240 V ± 10 %, 50/60 Hz, ≤ 2 VA
Alternate Supply Range (for related versions): AC/DC 24-240 V (not T221718 version)
PTC Inputs: 2 × 1…6 PTC resistors according to DIN 44081/44082
Switching Threshold: < 4000 Ω
Output 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 2
Housing: K-type housing, vertically arranged terminals, 22.5 mm wide
Mounting: 35 mm DIN rail or with M4 screws
Ambient Temperature Range: −20 °C … +55 °C
Dimensions (H × W × D): 75 × 22.5 × ~110 mm
Protection Class: IP 30 (housing) / IP 20 (terminals)
Weight: Approx. 110 g
