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PID Digital Temperature Controller – AI- 7781

The AI Series PID Digital Temperature Controller is a reliable and accurate panel-mount controller designed for industrial temperature control applications. It supports multiple thermocouple and RTD inputs, features bright dual LED displays, and offers PID or ON-OFF control with relay or SSR output options for heating and cooling systems.

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Features
  • Advanced PID Temperature Control for precise and stable performance

  • Dual 4-Digit, 7-Segment LED Display

    • Bright White for Process Value (PV)

    • Green for Set Value (SV)

  • Supports Multiple Temperature Sensors:

    • Thermocouple: J, K, R, S, N, T, B

    • RTD: Pt-100 / Pt-100 (0.1°C)

  • Wide Temperature Measurement Range up to 1800°C (sensor dependent)

Technical Specifications

DESCRIPTION AI-7481 AI-7781 AI-7981 AI-7681 AI-7881
1. DISPLAY TYPE : Dual 4- Digit 7 segment LED
Display Specification 4 Digit Bright White (PV) | 4 Digit Luminous Green (SV)
Display height (PV) 0.36″ 0.56″ 0.80″ 0.36″ 0.36″
Display height (SV) 0.24″ 0.39″ 0.56″ 0.36″ 0.36″
STATUS LED’S OP 1 : Main Control Output
2. INPUT
Sensor input TC : J, K, R, S, N, T, B | RTD : Pt-100
Sensor Type Range Resolution Accuracy
Fe-k(J) T/C 0 ~ 760°C 1 °C ± 1 °C
Cr-AL(K) T/C -99 ~ 1300°C 1 °C
(R) & (S) T/C 0 ~ 1700°C 1 °C
TC – N -99 ~ 1300°C 1 °C
TC – T -99 ~ 400°C 1 °C
TC – B 0 ~ 1800°C 1 °C
Pt-100(RTD) -100 ~ 450°C 1 °C
Pt-100(RTD 0.1) -99.9 ~ 450.0°C 0.1 °C ± 0.3 °C
Sampling Time 125 msec.
Resolution 1°C / 0.1°C (Only for RTD)
CJC for TC / LWC for Pt-100 Built in automatic / Built in upto 18E max.
Digital Filter 1 to 10 Sec.
3. RELAY OUTPUT
Contact type / Rating N/O, CM, N/C | 5A @ 250VAC or 30 VDC
Life expectancy / Isolation > 5,00,000 operations | Inherent
4. SSR DRIVE OUTPUT
Drive Capacity / Isolation 12V @ 30mA | Non-Isolated
5. FUNCTION
Output 1 Main Control output
Control Action / Mode ON-OFF / PID (Select) | Heat / Cool (Select)
6. ENVIRONMENTAL
Operating Range / Humidity 0 ~ 50°C | 5 ~ 90% Rh (Non-condensing)
Storage Humidity 95% Rh (Non-condensing)
7. POWER SUPPLY
Supply Voltage / Consumption 90~270VAC, 50/60Hz | 4W Maximum
8. PHYSICAL
Housing Material ABS Plastic

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