Signal Consulting, LLC   Model Si5HyUdPTC1-50V-20A

Hybrid, 50V 20A, Unidirectional, Proportional, Temperature Controller

with Integrated Heat Sink and with 9 Bit Digital Temperature Sensor Port, T-Chip

Si5HyUdPTC1-50V-20A Features: Power Semiconductors: Two 60A MOSFET Max. Continuous Current: 20A with Heat Sink as Shown. Max. Current for 5sec: 40A with  Heat Sink as Shown. Board's Size: 2.4" x 2.3" x 1.9" (6.1cm x 5.8cm x 4.8cm). Components Type: 100% Solid State, NO Relays   Closed-Loop Temperature Control in 1/20C Steps, -250C to +1020C Range   Factory Calibrated 9-Bit Digital Temperature Sensor is Immune to Additive Noise   High Power-Efficiency: 98.5% typical, at 50V 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 50V (for Vp)    Si5HyUdPTC1-50V-20A, Spec Sheet  (PDF)

The Si5HyUdPTC1-50V-20A is a 50V 20A, 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 resistive heater or Thermo-Electric (TE ) cooler cell in 0 to 1000W power range. 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 required temperature value (or load current) is derived from a variable analog-voltage, while the all other control-signals are digital. The desired temperature value (or load current) is set by an (0 to 5V range) external analog voltage (V_I1,G), or by an external potentiometer. This analog (I1) input is zener-diode protected. This board requires a single 9V to 50V DC power source (unregulated) at a 0A to 20A current range to operate normally. An onboard LED (red) is used to monitor the load-voltage. 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 20A or 1000W power levels. Higher power-levels (50V, 30A or 1500W) 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 Si5HyUdPTC1-50V-20A

In this heating or cooling application (but not both at the same time), the temperature (load-current) is proportionally controlled (in the 0 to 1000W power range) by the Si5 board and the desired temperature (or load current) 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  www.digikey.com as part number DS18S20-ND). The TE Cells can be purchased from Melcor Corp. Trenton, NJ 08648 USA, www.melcor.com.

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Typical International Shipping Cost: $24.00.

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