Instruction manual for the ALTEC DC220 temperature difference controller covering installation, wiring, operation, and communication.
The ALTEC DC220 is a temperature‑difference controller designed for HVAC and industrial applications. It measures two input signals and provides flexible output options such as relay, logic level, and SCR modules.
This manual includes hardware installation, electrical wiring, panel operation, software configuration, PID auto‑tuning, fault diagnostics, linear process input handling, and serial communication setup. This manual is written in Chinese.
| Measurement accuracy | ±0.2 % of full scale |
|---|---|
| Power supply voltage | 85‑264 V AC, 45/60 Hz |
| Operating temperature | 0 °C to 50 °C, ≤85 % RH |
| Thermocouple types supported | J, K, E, R, S, T, B |
| Relay output rating | Maximum 250 V AC, 3 A |
| Linear input range | 0‑20 mA, 4‑20 mA, 0‑10 V |
The DC220 includes a built‑in PID auto‑tuning algorithm; activate it from the menu (section 9) to let the controller automatically adjust PID parameters.
Press the ▲ or ▼ keys on the front panel to increase or decrease the setpoint (SV) value.