Temperature Controlled Switch - 12Vdc

Temperature Controlled Switch

 Connect the module according to the drawing. Please use a stabilized power supply with an output voltage of 12V...15V DC voltage  (capacity > 100mA) as operating voltage.

The enclosed heat detector (NTC resistor 47K) has to be connected with the module according to the drawing via a short cable (max. length 1 m).  The head of the heat detector has to be mounted insulated at a place where the temperature shall be controlled. Please make sure that the heat  detector is attached electrically insulated at the heat source to be monitored! This also applies to the contact pins of the heat detector, which must be insulated from each other and may neither have any electrical connection to other parts. If liquids shall be controlled, the sensor should be completely coated with a water-tight material (e.g. hot-melt adhesive), so that no liquid will get into direct contact with the sensor. The sensor isolated in this manner must not be immersed into flammable or corrosive liquids!

 The relay contact has a change-over contact (1x switch-over). So depending on the wiring a load may either be switched on or off when reaching the adjusted temperature. Note: We specify the maximum rating of the installed relay with 25V/5A. However, the installed relay may actually be charged with 230V~. The safety regulations of the VDE (Association of German Electricians), however, have to be observed in addition for this purpose: protection against accidental contact, fuses connected in series, etc. The module as supplied does not comply with these safety regulations (e.g. because of the open connecting cables).

 Setting into operation: 

Switch the module on, bring the body at which the heat detector shall control the temperature to the desired temperature at which it shall switch. Then the desired switching threshold is adjusted with the adjusting controller (adjust the trimming potentiometer until the module switches). Please keep in mind with all settings that the temperature sensor needs a certain time until it has taken on the temperature (approx. 5...20 sec.). Furthermore, there is a switching window of about 3...6 degree C. Example: the module switches at the adjusted temperature of approx. 100 degree C. Then it may happen that it only switches off again at approx. 94…97 degree when the temperature falls. The installed LED „Control“ lights up when the module switches.

 Technical data:

•  Temperature switch-thermostat 12Vdc 
• Adjustable electronic temperature switch
• Operating voltage: 12V...15V= stabilized (max. 0,1A)
• Temperature range: approx. 0...100°C
• Switching output: relay contact 1x switch-over max. 5A/25V
• The sensor (Ø 5mm) may be connected with the control electronics via a cable with a length of up to 1 m
• Dimensions: approx. 60 x 45 x 25mm (without fixing straps)