ATR121-AD PIXSYAS Compact Digital PID Controller
Pixsys ATR121-AD is a highly versatile, microprocessor-based compact PID controller designed for precise temperature and process regulation in space-restricted industrial environments. Housed in a standardized 32x74 mm panel-mount enclosure, this ultra-flexible device features a universal analog input compatible with a wide array of thermocouples, RTDs, linear voltage/current process signals, and potentiometers.
Operating on a flexible 12 to 24 V AC/DC power supply, the ATR121-AD uses advanced software features, including an optimized PID heating-cooling algorithm with autotuning, plus special open-close logic tailored for motorized valves. With dual setpoint functionality, an 8A control relay, and a dedicated solid-state relay (SSR) command output, this unit serves as an ideal solution for industrial HVAC, refrigeration, flow management, and dosing systems.
Parameter | Specification |
|---|---|
Manufacturer | Pixsys |
Model / Part Number | ATR121-AD |
Product Type | Compact PID Temperature & Process Controller |
Supply Voltage | 12 to 24 V AC/DC $\pm$10% (50/60 Hz, non-isolated) |
Power Consumption | Approx. 2.4 W / 2.4 VA |
Display | 3-Digit Red LED (0.56") with 3 status signaling LEDs |
Analog Inputs | 1x 16-bit configurable input |
Supported Sensors | Thermocouples (K, S, R, J); RTDs (Pt100, Pt500, Pt1000, Ni100); Thermistors (PTC 1K, NTC 10K) |
Linear / Process Inputs | 0 to 10 VDC; 0/4 to 20 mA; Potentiometers ($\le$6 k$\Omega$ or $\le$150 k$\Omega$) |
Sampling Time | 66 ms (15 Hz frequency) |
Relay Outputs | 1x Main Control Relay (8A - 250 VAC resistive load) |
Digital Outputs | 1x SSR command output (12 to 35 VDC, 30 mA) |
Auxiliary Output | 12 VDC - 30 mA max for external sensor supply |
Control Algorithms | ON/OFF with hysteresis, P, PI, PID, PD time-proportional, Dead band |
Tuning Modes | Manual or Automatic Tuning (Autotuning) |
Dimensions / Front Panel | 32 mm (H) x 74 mm (W) x 53 mm (D) |
Enclosure Rating | Front Panel: IP54 (IP65 with gasket); Box: IP30; Terminal Blocks: IP20 |
Housing Material | Polycarbonate box; Front panel self-extinguishing ABS UL94V0 |
Operating Conditions | 0°C to 45°C; 35% to 95% RH (non-condensing) |
Weight | Approx. 100 g |
Certifications | CE, UL, RoHS Compliant |

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- Started from: Jul 10, 2025



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