ATR244 Universal Controller
The ATR244 is an industrial digital controller/regulator designed for indoor process control applications. Follow the safety guidelines before connecting, installing, or configuring the unit.
Technical Specifications (Extracted)
| Model | ATR244 (series with 5 versions) |
| Display | 4 digits, 0.52″ OR 5 digits, 0.30″ |
| Operating temperature | 0–45 °C |
| Humidity | 35–95 uR% (as stated) |
| Protection | IP65 front panel (with gasket); IP20 box and terminals (UL not evaluated) |
| Enclosure material | Box: PC UL94V2 self-extinguishing; Front panel: PC UL94V2 self-extinguishing |
| Weight | Approx. 185 g |
| Cooling | “Cooling” listed under hardware features (details not included in extracted text) |
| AI1/AI2 (Analog inputs) | Configurable via software; accepts thermocouples (types K, S, R, J, T, E, N, B) and thermoresistances (PT100, PT500, PT1000, Ni100, PTC 1K, NTC 10K (3435K)), and V/mA inputs (0–1 V, 0–5 V, 0–10 V, 0–20/4–20 mA, 0–60 mV). Cold junction compensation: -25..85 °C. |
| AI input accuracy (thermocouples/thermoresistance/V-mA) | Thermocouples/RTD: ±0.2% 1 digit (as stated for F.s.); cold junction accuracy 0.1 °C/°C; V/mA ranges include stated resolution/points (details below). |
| Analog input impedance | 0–10 V: Ri>110 kΩ; 0–20 mA: Ri≈1 MΩ (as extracted) |
| Analog outputs | Configurable as command/alarm or retransmission; 0–10 V with 40000 points ±0.2% (as stated); 4–20 mA with 40000 points ±0.2% (as stated) |
| Relay outputs | Configurable as command and alarm outputs; contacts: 2 A – 250 VAC for resistive loads |
| SSR outputs | Configurable as command and alarm outputs; 12/24 V, 25 mA |
| Supply ranges | ATR244-12xxx and -13ABC: 24..230 VAC/VDC (15%, 50/60 Hz) 6 Watt/VA ATR244-23A-T: 24 VAC/VDC (15%, 50/60 Hz) 6 Watt/VA ATR244-23BC-T: 115..230 VAC (15%, 50/60 Hz) 6 Watt/VA |
| Relay/power supply terminal screw tightening torque | 0.51 Nm |
| Other terminals tightening torque | 0.19 Nm |
Troubleshooting Guidance (Extracted)
- Unexpected loss of control/alarm outputs: If a malfunction in the Digital Controller occurs, control operations may be impossible and/or alarm outputs may not work. Take appropriate safety measures, such as installing a monitoring device on a separate line.
- Probe error alarm: A “Probe error” alarm is active in case of sensor breakage.
- Relay life / overheating-related issues: The product notes that if output relays are used past their life expectancy, contact fusing or burning may occasionally occur—ensure output relays are used within their rated load and electrical life expectancy.
- Incorrect relay terminal tightening: Loose screws may occasionally result in fire. Tighten relay and power supply screw terminals to the specified torque (0.51 Nm) and other terminals to 0.19 Nm.
FAQ
- What should I do before making hardware settings or electrical wiring changes?
- Disconnect the power supply before proceeding to hardware settings or electrical wirings to avoid the risk of electric shock and fire/malfunction.
- What does “Probe error” indicate?
- “Probe error” is an alarm active in case of sensor breakage.
- What is the required tightening torque for relay and power supply screw terminals?
- Tighten screws to a tightening torque of 0.51 Nm for screw terminals of relays and of the power supply.
Documents / Resources
 | ATR244 Controller |
References
- User Manualmanual.tools
Published: August 13, 2026