TEMPERATURE RELAY TR122 DA

Product Description

The TR122DA Temperature Relay is an industrial Pt100-based temperature monitoring and control relay designed for precise temperature measurement, alarm functions, and analog signal conversion in automation and process systems.

It is widely used in HVAC systems, chillers, heating systems, gas lines, and industrial process control panels where reliable temperature supervision is required.

Key Features

• Pt100 RTD temperature input (1 sensor)
• Dual independent switching points (alarm + pre-alarm)
• Digital display for real-time temperature monitoring
• Analog output (0/4–20 mA scalable)
• Over-temperature and under-temperature monitoring
• Programmable relay logic (alarm/control function)
• High accuracy temperature control and monitoring
• Suitable for 2-point or 3-point control systems
• Sensor break and short-circuit detection
• DIN rail mountable compact design

Technical Specifications

• Product Type: Temperature Relay / Controller
• Model: TR122DA
• Series: TR 122 D(A)
• Manufacturer: ZIEHL
• Input Type: Pt100 RTD (2-wire / 3-wire)
• Measuring Range: -199°C to +850°C
• Display: 3-digit digital display
• Output:

2 relay outputs (changeover contacts)
1 analog output 0/4–20 mA (TR122DA only)
• Supply Voltage: AC/DC 24–240 V (universal)
• Accuracy: High precision industrial-grade (±0.3% typical)
• Resolution: 0.1°C (within selected range)
• Hysteresis: Programmable
• Protection: IP20 (electronics), higher with enclosure
• Mounting: 35 mm DIN rail
• Operating Temperature: -20°C to +55°C
• Functions: Pre-alarm, main alarm, controller mode, transmitter mode
• Memory: Min/Max temperature storage