Overview
The Elreha TAR 1170 is a precision temperature controller designed for single-circuit refrigeration and climate control applications. This German-engineered device combines simple ON/OFF switching logic with an integrated cyclic defrost function, making it well-suited for refrigerated counters, cold storage rooms, and similar industrial cooling environments. The controller monitors temperature via an external sensor probe and delivers relay-switched output for compressor or heating element control.
Key Features
- Single-circuit ON/OFF temperature control with adjustable hysteresis (2–10K range)
- Integrated cyclic defrost function to prevent ice buildup in cooling systems
- Setpoint range of –50 to +100°C (–58 to +212°F) with adjustable control window
- Compact DIN-rail or wall-mounted housing with LED display and parameter buttons
- Sensor fault detection: automatic relay shutdown if probe is broken or shorted
- Configurable dual operation modes for standard cooling or defrost cycling
Technical Specifications
Key electrical and operational characteristics:
- Input Voltage: 12V AC/DC (12–18V DC acceptable)
- Power Consumption: Max 2.0 VA
- Relay Contact Rating: 8A cos φ=1, 3A inductive @ 250V~
- Temperature Probe: External sensor (open-circuit and short-circuit protected)
- Setpoint Range: –50 to +100°C (default range; adjustable via P04/P05 parameters)
- Switching Differential (Hysteresis): Default 2K, adjustable 2–10K (4–18°F)
- Defrost Modes: Timer-based or air-defrost (runtime-based) cycling
- Display Resolution: 0.1°C / 0.1°F increments
- Protection Class: IP 54 (front)
- Terminals: Screw terminals rated for 2.5 mm² conductor
- Weight: 1.5 kg
- Certifications: EMC compliance per EN 55011 B, EN 50081, EN 50082, IEC 1000-4 series
Typical Applications
- Refrigerated display cases and counters in retail/food service
- Walk-in cold storage and freezer rooms
- Commercial ice cream cabinets
- Laboratory and pharmaceutical refrigeration
- Climate control in industrial cooling systems
- Backup temperature control in critical cold-chain applications
Compatibility & Replacements
Compatible With
- Any 12V AC/DC power supply (12–18V DC acceptable)
- Standard temperature probe sensors (NTC thermistor or similar external probes)
- Single-phase refrigeration and heating circuits
- Relay-switched compressor and defrost heater loads
- DIN-rail mounting systems (standard 35 mm rail)
Replaces / Drop-In Replacement For
- Elreha TAR 1170 V (12V AC/DC variant with different case style)
- Legacy Elreha single-circuit temperature controllers in equivalent voltage class
- Direct replacement for identical TAR 1170 units removed from field service
Works With
- External temperature probes (RTD or NTC thermistor sensors)
- Manual parameter adjustment via onboard programming keypad
- Cyclic defrost timer logic (configurable delay, runtime, and duration)
- Relay switching for any inductive or resistive load up to 8A / 250V AC
- Standard refrigeration control signal wiring and DIN-rail automation architectures
