Manufacturer: ZIEHL industrie-elektronik GmbH
Model / Type: MSF220SE
Device Type: PTC-Resistor Relay (Thermistor Relay) for Dry Transformers
Supply Voltage:
• AC/DC 90–240 V (AC 80–264 V, DC 80–297 V), < 2 VA
• AC/DC 24–240 V (AC 20–264 V, DC 21–297 V), < 2 VA
PTC Sensor Inputs:
• 2 × 1…6 PTC resistors according to DIN 44081/44082
• Max circuit cold resistance: 1500 Ω per circuit
Switching Point: < 4000 Ω
Output Relays: 2 × change-over contacts (CO)
Contact Type: Type 2 (industry standard)
Integrated Timing Relay (K3): suppresses alarm impulse at supply ON (approx. 2–4 s delay)
Test Function: TEST button for Alarm 1 and Alarm 2 check
Indicators: LEDs for ON, Alarm 1, and Alarm 2 status
Rated Ambient Temperature: −20 °C … +55 °C
Dimensions (H × W × D): 82 × 42 × 121 mm (design S12)
Mounting: 35 mm DIN rail (EN 60715) or with M4 screws
Protection Class (Housing/Terminals): IP40 / IP20
Weight: approx. 210 g
