Signal Consulting, LLC  Model Si24HyTEPTC1-12B-50V-20A

12-Bit, Hybrid Thermo-Electric Proportional Temperature Controller with LCD port, and with PWM-Y

Si24HyTEPTC1-12B-50V-20A Features: Fully Programmed Proportional Temperature Controller Efficient H-Bridge for Bidirectional Current Control 12-Bit Temperature Control with 0.0650C Steps, in the  -250C to +1020C Range Set-Temperature Adjust with a Potentiometer in 0.50C Steps Digital Thermometer with 1/20C Accuracy   12-Bit Proportional Temperature Control:  Sixteen non-uniformly spaced temperature levels (centered around a set-temperature value) with eight PWM duty-cycle values are used to control the temperature in 0.06250 C steps, (G8 Control Grid).  LCD Port: For Set and Measured Temperature Display High Power-Efficiency: 98.5% typical, at 50V and 20A Optically Isolated Control Signals On Board: Filter Capacitors VTS diodes Four 110A Power MOSFETs 20A Fast Mini Fuse (with socket) Bicolor LED Indicator,  (Red=Hot, Green=Cold) Voltage Requirement: A single DC Source Voltage (unregulated ) with any voltage value from 9V to 50V (for Vp)   Si24HyTEPTC1-12B-50V-20A, Spec Sheet  (PDF)

The Si24HyTEPTC1-12B-50V-20A is a versatile, fully-programmed microprocessor based, closed-loop, Hybrid, Thermo-Electric, Proportional Temperature Controller board that heats or cools a thermal-zone. The temperature is measured with a 12-bit digital sensor and proportionally controlled with 0.0625⁰C steps.  An efficient high-power H-bridge controls the current (in the 0 to +/- 20A range) to Peltier type Thermo-Electric (TE) cells, functioning as a bidirectional heat-pump. By proportional control, we mean that the amount of correction used in the closed-loop is proportional to the difference between the set and measured temperature values. Sixteen non-uniformly spaced temperature levels (centered around a set-temperature value) with eight PWM duty-cycle values are used to control the temperature in 0.0625⁰ C steps, (G8 Control Grid). The temperature overshoots and oscillations (“hunting”) are limited to approximately + or - 0. 5⁰C. The temperature is sampled at approximately 1Hz rate and the control-loop/display is updated with the same rate.  An onboard microprocessor measures and controls the temperature; monitors the user inputs; and drives a 2 line x 20 character LCD. A small 12-bit digital thermometer, Signal’s part number Si24DTsens-12B  (connected to port CN4A4 and uses the Dallas Semi., DS18B20 sensor) is used to measure and control the temperature in the -25⁰C to +102⁰C range, with ½⁰ C accuracy. Because this sensor is digital, it is virtually immune to noise and loading; ideally suited for remote sensing. This sensor uses a unique “1-wire interface” (with parasite power mode) that requires only 2-conductors for reliable remote (typical length of 20 meters) temperature sensing. As the name Hybrid (Hy) implies, the desired set-temperature is linearly adjusted with the Si24Pot1-5kMC3  potentiometer in the -25⁰C=0V to +102⁰C=+5V range, with ½⁰ C=19.68mV steps. An LCD port (with HITACHI HD44780 Interface Standard) is provided for display of the Set and Measured temperature data. The 2 line x 20 character LCD can be ordered from  Signal under the part number of Si24LCD2L20CH  (2x20 display with 8” ribbon cable and 14-pin connector) or can purchased from many vendors. A bicolor LED is used to monitor the TE cell (or load) voltage (Red = Heat, Green = Cold); and an optional fast acting 20A Mini-Fuse (with socket) is used for board protection. This board operates with a single unregulated voltage source (9V to 50V range). A small Aluminum plate (3.3”x4.0”x0.065”) is required to operate at 1000W power level. Higher power-levels can be achieved with more efficient heat-sinks. Typical applications are: Peltier Effect TE Coolers, Heat Pumps, etc. This board can be configured and programmed to perform efficiently in many customized applications.

A Typical Application of the Si24HyTEPTC1-12B-50V-20A

In this 12-bit, closed-loop, proportional temperature control application, the Set-Temperature is linearly adjusted (in the, -25⁰C=0V to +102⁰C=5V Range with 0. 5⁰C=19.68mV steps) with the Si24Pot1-5kMC3  potentiometer, connected to port CN6k. The Peltier type Thermo-Electric (TE) cell is functioning as a bidirectional heat-pump; operating with 12VDC (unregulated) at 20A max. TE cells can be purchased from Melcor Corp. Trenton, NJ 08648 USA, WEB: www.melcor.com. The temperature of the enclosed and insolated Hot/Cold Environment is measured with the Dallas Semi. DS18B20 (in TO-92 casing) Digital Thermometer, Si24DTsens-Spec1-DS18B20.This sensor can be purchased from Signal Consulting, LLC as Si24DTsens-12B (DS18B20 with 12” leads and connector). The LCD module can be ordered from Signal with the part number of Si24LCD2L20CH  (2x20 display with 8” ribbon cable and 14-pin connectors) or can be purchased from several vendors; for OEM pricing, contact: Sunlike Display Tech Corp. in Taiwan, www.lcd-modules.com.tw .

Typical Domestic Shipping Cost: $12.00.
Typical International Shipping Cost: $24.00.

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

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