Field Configurable, Unidirectional, Thermo-Electric (TE),
Proportional-Integral (PI), Temperature Controller with RS232 LCD Port,
Centigrade or Fahrenheit Display Scales and with Analog or Digital Control
Inputs for Heating-only or Cooling-only
Configuration and PI parameters are selected in the programming mode
and stored in nonvolatile memory.
PI Temperature Control:
Proportional and Integral (PI) Temperature Controller
in the -500C to +1250C Range with 0.0650C steps
on 1 Load. Heat-only or Cool-only (but not both at the same time)
User Selectable Control
is used to
select the Programming Mode (J2 Open) or the Running Mode (J2
Analog or Digital
Set-Temperature Inputs: The
Set-Temperature is adjustable with an onboard 25-Turn
Potentiometer in the Analog Configuration and with
Up/Down-keys in the Digital Configuration.
One Digital Temperature Sensor:
A Digital Temperature Sensor with 0.06250C
and 1/20C Accuracy
-250C to +1020C Range, and approx.
-550C to +1250C Range.
Temperature Sampling Rate:
The temperature is sampled at approximately 1Hz rate and the
control-loop/display is updated with this same rate.
An Optional LCD Port:
For Set and Measured Temperature Display.
In the Run-Mode,
open switch (or an Open Collector npn Transistor) can be connected
to jumper J1 (as shown below), J1 Open=Normal operation, J1
Short=Load (TE Cell) is open.
PWM Load Control: One 80A MOSFET is used to PI control the load power (to
a Valves , TE cells, etc)
using 750 Hz Pulse-Width Modulation.
98.5% typical, at 26V and 10A
Voltage Requirement: A single DC Source Voltage (unregulated )
with any voltage value from 9V to 26V DC (for Vp) at 16A max.
Max Operating Temperature:
+450C , Without Heat Sink, as shown.
Max Load Power: 416W at 26V, 16A.
Overall Dimensions: L=2.6", W=0.9",H=0.75" (66 x
23 x 19mm).
Components Type: 100% Solid State, NO
On Board: Filter Capacitors, Voltage Transient Suppression (VTS)
diodes, Onboard Load-Current Indicator LED (Red).
Si4UdTEPITC1-FC12B-26V-16A is a 26V 16A,
microprocessor based, closed-loop, Field-Configurable, 12-Bit, Unidirectional,
Thermo-Electric (TE), Proportional-Integral (PI) Temperature Controller
board. Changing from a heating-only to a cooling-only configuration (or from
cooling to heating) is accomplished by powering OFF the unit, reversing the
Thermo-Electric (TE) cell wires, and after powering ON the unit, a configuration
parameter in the controller must be changed. An efficient high-power MOSFET
controls the average current to the TE cell using 750Hz carrier frequency
Pulse-Width Modulation (PWM). By PI control, we mean that the amount of
correction used in the PWM control-loop is proportional to the difference and
the Integral of the difference between the set and measured temperature values.
In a properly tuned PI controller, the temperature overshoots and oscillations
(“hunting”) are limited to approximately + or - 0. 50C. An
onboard microprocessor measures and controls the temperature, monitors the user
inputs, and drives a 2 line x 16 character LCD. The temperature is sampled at
approximately 1Hz rate and the control-loop/display is updated with the same
rate. A small 12-bit digital temperature sensor, Signal’s part number
(connected to port CN4) is used to measure and control the temperature in
the -500C to +1250C range, with 10 C accuracy;
and with ½0C accuracy in the -250C to +1020C
range, with 0.0650 C precision. 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” (in parasite power mode) that requires only
2-conductors for reliable remote (typical length of 20 meters) temperature
sensing. The jumper
J2 is used to select the Configuration Mode (J2 Open) or the
Running Mode (J2 Short). In the Configuration Mode, a set of
control-parameters are selected (or the Board is Configured); and in the
Running Mode, the configured parameters are executed. In the Analog
Configuration, the desired set-temperature is linearly adjusted (in
the -250C=0V to +1020C=+5V range, with ½0
C=19.68mV steps) with a 25-Turn Onboard potentiometer. In the Digital
Configuration, the desired set-temperature is adjusted with the Up/Down Keys
two Normally-Open Push
Buttons, connected to Port J3) in the -500C to +1250C
range, with 0.0650 C steps. An LCD port with user selectable
Centigrade or Fahrenheit Display scale (with 9600 Baud RS232 Interface
Standard) is provided for Set and Measured temperature display. The LCD can be
ordered from Signal under part number
(2-Line by 16-Char display
with 12” cable and 3-pin connectors, and with back-light). A red LED is used to
monitor the TE cell (or load) voltage. This board operates with a single
unregulated voltage source (9V to 26V range). This board can be configured and
programmed to perform efficiently in many customized applications.
A Typical Application of the
In this 12-bit, closed-loop,
PI temperature control application; and in the Analog Mode, the Set-Temperature
is linearly adjusted with the board mounted 25-Turn potentiometer. In the
Digital Mode, the Set-Temperature is adjusted with the
Up/Down Keys (connected to port J3). The Peltier type Thermo-Electric
(TE) cell is functioning as a heat-pump; operating with 24VDC (unregulated) at
16A max. The temperature of the enclosed and insolated Hot/Cold Environment is
measured with the
Si24DTsens-12B Digital Sensor with 12”
leads and connector. The LCD module can be ordered from Signal with part number
Si14LCD2L16CH-3PC (2x16 display with 12” cable, 3-pin connectors, and
with back-light). A wide variety of Linear and Switching-Type Power Supplies can
be purchased from:
Warning: The connecting wires to the Load and the Power Supply must be heavy
gauge copper wire (#12 AWG or heavier) to handle the rated current level. In
addition, these heavy gauge wires act as a heat sink, protecting the board from
on the "Buy this
Product" Button or the Blue
Links Below to Buy the Optional Accessories
Si4UdTEPITC1-FC12B-26V-16A, it is recommended to buy one
Digital Sensor and one or more Accessories .
Si24DTsens-12B , 12-bit Digital Thermometer (
-550C to +1250C Range, in 0.0650C
12" leads and 3pin Molex Connector.
2 Line by 16 Character LCD with 12" long cable and 3-pin
Two Push-Buttons with 12" lead and
with a 3-pin Open Connector.
We usually ship in 2-3 business
All Products Are Proudly Made in the USA