Manufacturer: ZIEHL industrie-elektronik GmbH
Model / Type: MS220KA
Device Type: PTC Thermistor Relay (PTC-resistor relay)
Application: Protection against excessive temperature rise on electrical equipment (motors, etc.)
PTC Sensor Input: 1 PTC resistor set (3 or 6 PTC sensors in series)
Short-Circuit Monitoring: Yes (sensor circuit)
Output Relays: 1 or 2 change-over contacts (CO)
LED Indicators: ON and ALARM LEDs
Housing: K-housing with vertically arranged terminals, 22.5 mm width
Mounting: DIN-rail or with M4 screw option
Supply Voltage Options:
• AC 220-240 V (typical)
• AC/DC 24 V (option)
ATEX Approval: Directive 2014/34/EU (for explosive atmospheres)
Safety Standards: SIL 1 (IEC 61508), PL c (ISO 13849)
UL Compliance: UL Recognized Component
Operating Temperature Range: (Typical industrial range around −20…+55 °C) based on similar models/manuals
Thermistor Resistance Range: Approx. 50 Ω … 1500 Ω for correct operation (from operating manual data)
