The TC-36-25-RS232 comes with one MP-2996 thermistor. If you would like to purchase additional thermistors, please indicate when ordering. APPLICATION
The TC-36-25-RS232 provides bi-directional temperature control for thermoelectric devices, either independently or with supplemental resistive heaters for both cooling and heating applications. The controller uses solid-state MOSFET devices in an electrical "H" bridge configuration to automatically control the direction of current simply based on the temperature set point.
The controller can be communicated with and programmed directly through a personal computer’s RS232 serial communication port. The supplied communications software, 
compatible with Windows 95/98/XP/NT, provides a graphical user interface; no prior programming experience is required to use it. However, the command set is provided so that qualified personnel can use it is as an embedded control or can create a custom program interface using LabVIEW, for example.
Once the desired controller parameters are established, the settings can be saved to non-volatile memory. The TC-36-25-RS232 can then be disconnected from the computer and operated as a unique, stand alone controller. The controller can also be configured to use a variety of analog inputs to adjust the set point.
Mechanically, the controller’s printed circuit board is mounted to a metal bracket that is suitable for either horizontal or vertical orientation. The controller can operate in ambient temperatures from 0 °C up to 60 °C without generally requiring additional heat sinking. TECHNICAL DESCRIPTION Low voltage TE device control capability. The TC-36-25-RS232 requires an input voltage anywhere from 12 V up to 36 V. That voltage powers the microprocessor and can also be modulated and sent to the thermoelectric device. However, if the thermoelectric cooler or Peltier device operates on a voltage lower than 12 V, a second low-voltage power supply can be connected. The controller will then switch this voltage on and off to the TE device. The second input voltage can range anywhere from 0 V to 36 V. High resolution and Stability. The output signal to the thermoelectric cooler is pulse-width modulated (PWM) at 2700 Hz. The PWM control scheme affords temperature resolution of 0.01 °C or 0.01 °F and best-case controller stability within ±0.01 °C or ±0.01 °F. The controller tuning structure allows designation of a variety of control features: manual, proportional, proportional-integral, proportional-derivate, or proportional-integral-derivative control. Differential temperature control is also available when two input sensing thermistors are used. Accepts a wide variety of thermistors. The controller comes with a standard 15k ohm thermistor which provides a control temperature range of -20 °C to 100 °C. However, the controller can be used with a wide variety of other NTC type thermistors which are pre-programmed and selected via a menu in the software. For example, a 5k ohm thermistor can also be used to extend the control temperature down to -40 °C. Also, since many laser diode packages come standard with a 10k thermistor, there are two different 10k thermistor settings available. Remote control capability. Once the controller is programmed, it can run independent of a computer, and the set point can be adjusted in several ways. The optional MP-2986 Display and Keypad accessory can be used to adjust the set point and provide a digital readout of the set point and the sense temperature. The controller can also use a potentiometer, a 0 to 5 VDC signal, or a 0 to 20 mA current loop. Configurable alarm actions. Several alarm types may be selected: no alarm, tracking alarm, and fixed value alarm. The alarm can be configured to either maintain the output power during an alarm or to shut down the power output. The alarm latch can be selected to either automatically restart power if the alarm clears itself or to keep the power output off until the latch is manually cleared. The controller can also provide a 25 mA signal for powering an LED or other device when an alarm occurs. Over-current protection. In addition to alarm protection, the controller can provide over-current protection to the TE device. The setting can be adjusted in 2.5 A increments. The maximum current the controller can handle is 25 A at steady state.
SPECIFICATIONS RoHS Compliant Bi-directional, solid-state "H"-bridge configuration for heating and cooling applications Input voltage from 12 to 36 VDC or 0 to 36 VDC with a secondary power supply Self-contained, 0.1 to 25 A load rating, with over-current protection Computer programmable via RS232 communications port or stand-alone operation without a computer Control temperature of -20 ºC to 100 ºC, other ranges available with optional thermistors Proportional (P), Integral (I) and Derivative (D) control Temperature resolution and best-case control stability of 0.01ºC Pulse-width modulation frequency at 2700 Hz 5K, 10K, and 15K ohm thermistor capability Set temperature adjustable via:
Remote user set temperature potentiometer
4 to 20 mA current loop
0 V to 5 V adjustable range
Differential temperature control
MP-2986 Display and Keypad accessory No computer programming experience required to use the communications software program Command set is provided so programmers may create their own software interface or embedded controller applications (sample LabVIEW source code available upon request) Computer configurable alarms Non-volatile memory retention of parameters Operating temperature range of 0 °C to 60 °C, storage temperature range of -55 °C to 105 °C
Download TC-36-25 RS232 Manual
Download Temperature Sensor Attachment Manual
Download TC-36-25 RS232 Software (See also Software License Agreement) TC-36-25 RS232 3D Model in .pdf format (Requires Adobe Reader 8.0 or higher)
3D MODEL: Click on the link above to download a 3D model. You can rotate and view the cooler from any angle to better understand the physical properties of the product. (However, wire leads are not shown in the model.) This is a portable document format (.pdf) file, Adobe Acrobat 8 or higher is all that is required for viewing. You may be prompted by Adobe Acrobat to do a one-time upgrade to Version 8.0 or for 3D model support components. 3D content may initially appear as a two-dimensional preview image. Clicking the 3D model with the Hand or Select tool enables (or activates) the model and opens the 3D toolbar.Please email us (cool@tetech.com) if you need STEP files of the 3D model.
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