W1209 is a compact and inexpensive digital temperature control module that uses an NTC thermistor as a temperature sensor. It is commonly used for applications like incubators, temperature-controlled fans, and DIY heating/cooling systems.
· Temperature Range: -50°C to 110°C
· Operating Voltage: 12V DC
· Output Type: Relay switch (10A 250V AC / 10A 30V DC)
· Temperature Sensor: NTC 10K Thermistor
· Display: 3-digit 7-segment LED
· Control Mode: Heating or Cooling
· Hysteresis Setting: Adjustable
· Delay Start Function: Yes
· Buttons:
o SET: Adjust parameters
o + / -: Modify values
1. Power Supply (12V DC)
o Connect the VCC and GND pins to a 12V power source.
2. Temperature Sensor
o Connect the NTC thermistor to the sensor input.
3. Relay Output
o The relay has NO (Normally Open), COM (Common), and NC (Normally Closed) terminals.
o For heating: Connect your heater to NO and COM.
o For cooling: Connect your fan/compressor to NO and COM.
· P0: Heating (H) / Cooling (C) Mode
· P1: Hysteresis (0.1°C to 15°C)
· P2: Upper Temperature Limit
· P3: Lower Temperature Limit
· P4: Temperature Correction Offset
· P5: Delay Time (0 to 10 minutes)
· P6: High-Temperature Alarm