Scenario: You want to control a 220V Heater.
⚠️ SAFETY WARNING: Always disconnect power before wiring. If you are controlling high-power heaters, do not pass the high current directly through the controller terminals (Terminals 3 & 4 usually max out at 3 Amps). Use the controller to switch a larger external Contactor or Solid State Relay (SSR) instead.
Problem: The display shows "HHHH" or "OPEN" xmtd-2201 manual
Problem: The display shows "LLLL"
Problem: The temperature keeps rising past the setpoint (Overshoot). Scenario: You want to control a 220V Heater
Problem: The output indicator is ON, but the heater is not working.
| Terminal | Function | |----------|----------| | 1, 2 | Power (L, N or +24V, 0V) | | 3, 4, 5 | Thermocouple / RTD input (e.g., 4: +, 5: -) | | 6, 7 | Relay output (normally open) | | 8, 9 | Alarm 1 output | | 10, 11 | SSR drive output | | 12, 13 | 4–20mA output (if present) | Problem: The display shows "HHHH" or "OPEN"
⚠️ Actual wiring depends on specific model variant. Always check the label on the unit.
If your temperature overshoots wildly (goes 30°C above SV) or takes forever to reach temperature, you need to run Auto-Tune.
The XMTD-2201 is a compact, versatile electronic device designed for hobbyists and professionals who need reliable control and monitoring capabilities in embedded systems. This overview summarizes the XMTD-2201 manual’s essential sections: specifications, installation, operation, maintenance, troubleshooting, and safety. Use this as a focused guide to understand and operate the device effectively.