Signal Consulting, LLC 

 Model Si5HyUdPTC2-HC-30V-2x20A

Dual 30V-2x20A Hybrid, Unidirectional, Heat/Cool, Peltier/Thermo-Electric  Proportional Temperature Controller with Heat Sink, 9-Bit Digital Temp Sensor, Serial RS232 LCD Port





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 Si5HyUdPTC2-HC-30V-2x20A Features:

  Two 30V 20A DC Loads: Load #1  for TE Heating  and Load #2 for TE Cooling.

Max. Continuous Current: 20A each, with Heat Sink shown.
Max. Current for 5sec: 40A each, with Heat-Sink shown.
Overall Dimensions: 2.4" x 2.3" x 2.2" (61 x 58 x56mm).
Components Type: 100% Solid State, NO Relays, Two 60A MOSFETs.

  Closed-Loop Temperature Control in 1/20C Steps, -250C to +1020C Range

  Factory Calibrated 9-Bit Digital Temperature Sensor is Immune to Additive Noise 

  9600-Baud RS232 Serial Port: For Temperature Display

  High Power-Efficiency: 97.5% typical, at 30V and 20A

On Board:
Filter Capacitors
VTS diodes
Snubber Circuit Ready
Voltage Requirement:
A single DC Source Voltage (unregulated ) with any voltage value from 9V to 30V (for Vp)


 Si5HyUdPTC2-HC-30V-2x20A, Spec Sheet  (PDF)

The Si5HyUdPTC2-HC-30V-2x20A is a 30V 2x20A, Dual, microprocessor based, Hybrid, Unidirectional, Proportional Temperature Controller board with an integrated heat sink that uses pulse-width modulation (PWM) to efficiently control average current to a heater and to a cooler element. The heating element can be (Thermo-Electric, TE cell or resistive heater) and a cooling element can be (a 2ND TE cell or chilling pump); each element is proportionally controlled in the 0 to 600W power range with 5W steps. Two high-power MOSFETs (55V, 60A max.) are used (one for heating and one for cooling) to control the temperature of an enclosed environment. An onboard microprocessor allocates the load-power and controls the temperature. The sample temperature is measured by a small, 9-bit digital thermometer Si18DTsens. This sensor uses a unique “1-wire interface” (with parasite power mode) that requires only 2-conductors for reliable remote (long as 20 meters) temperature sensing. The term proportional controller implies that the value of the average load current used is proportional to the difference between the actual and desired temperature. Five PWM duty-cycle values are used depending on the absolute-value of the difference between the set and measured temperature values (|Td|). The duty-cycle is 0% when |Td|=00C; 25% when 00C< |Td|<0.50C; 50% when 0.50C< |Td|<1C0; 75% when 10C< |Td|<1.50C; 100% when |Td|>1.50C. This method allows a uniform temperature control in the -250C to +1020C Range, with 1/20C accuracy. As the name hybrid (Hy) implies, the desired temperature value is derived from a variable analog-voltage, while the all other control-signals are digital. This desired temperature value is set by an (0 to 5V range) external analog voltage (VI1,G), or by an external potentiometer. This analog (I1) input is zener-diode protected. A normally-open switch can be to port J1 for Emergency Stop (J1 Open=Run, J1 Short =Kill or Loads Open). This board requires a single 9V to 30V DC power source (unregulated and unfiltered) at a 0A to 20A current range to operate normally. An onboard Red LED is used to monitor the heater voltage, while a Green LED is used for the Cooler port. An optional Serial LCD (Si14LCD2L16CH ) is used to display the Set and Measured Temperatures. A small (2.3”x2.4”x0.45”) finned integrated heat sink is included with mounting hardware (as shown on the photograph) to operate at 2x16A or 960W power level. Higher power-levels (30V, 2x20A or 1200W) can be achieved with more efficient heat-sinks. Please click on this link and read the Board Mounting Instructions and Heat Sink Selection Guide. Typical applications are: DC Resistive Heater Controller, Thermo-Electric Cooler Controller, etc. This board can be configured and programmed to perform efficiently in many customized applications.

 A Typical Application of the Si5HyUdPTC2-HC-30V-2x20A

In this heating and cooling application (both at the same time), the temperature (load-currents to two TE Cells, one for heating and one for cooling) is proportionally controlled (in the 0 to 600W power range) by the Si5 board. The desired temperature is linearly adjusted with the Si5Pot1-5k accessory (an external 1-turn 5kW pot); -250C to +1020C Temperature Range, in 1/20C Steps. The 9-bit digital temperature sensor can be purchased from us (see Parts Department Si18DTsens) or you can wire up your own using the Dallas Semi. Digital Thermometer chip DS18S20, in TO-92 casing (order from as part number DS18S20-ND). An optional Serial LCD (Si14LCD2L16CH-3PC) is used to display the Set and Measured Temperatures. The TE cells can be purchased from: A simple unregulated DC power supply is shown below; wide variety of linear and switching power supplies can also be used with this board; click on to find these supplies.


Si5HyUdPTC2-HC-30V-2x20A, Hybrid Unidirectional Temperature Controller Board with Heat Sink
Price $129.00

Note: If Buying the Si5HyUdPTC2-HC-30V-2x20A, it is recommended to buy one Si18DTsens-9B  Digital Thermometer,  Si14LCD2L16CH-3PC  Display, and  Si5Pot1-5k Potentiometer.

Si18DTsens-9B  9-bit Digital Thermometer ( -550C to +1250C Range, in 1/20C Steps) with 12" leads and 3pin FM connector.
Price $29.00
 Si14LCD2L16CH-3PC  2-Line by 16-Char Serial LCD Display with 12"  cable and 3-pin connectors.  
Price $59.00
Si5Pot1-5k   1-Turn, Linear Taper, 5kW Potentiometer.
Price $15.00

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Availability: We usually ship in 2-3 business days.



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