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MESSTEC Power Converter GmbH
Operating Manual
TEC Controller
Document: 10100920OM
Revision: 1.1
Date: 10.10.2019
Page 37/71
7.2.4. Control Signals Analog X1
Pin
Name
Function
1
CA-SETPOINT
HW-SETPOINT input
2
CA-AUX-SETPOINT Auxiliary HW-SETPOINT input, not used
3
CA-POT
Output of built in potentiometer
(1 kΩ)
4
REF5V
Reference voltage output
5
GND
Signal GND
CA-SETPOINT
– Input (X1-1)
Control Analog
– HW-SETPOINT (Hardware-Setpoint)
Input resistance: 10 kΩ
The voltage feed into this input sets the hardware-setpoint of the temperature
controller.
Voltage sources for this purpose are:
+ Internal potentiometer
+ External potentiometer
+ Voltage controller
Wiring examples see below.
Note: The HW-SW-SETPOINT-MODE has to be set to HW by means of the
PC Software. This is the default mode.
The target temperature (in °C) is proportional to the voltage according to the
following relationship:
𝜗 = 𝑈
𝑋1−1
∗ 10
Example: 0 V => 0 °C ; 2,5 V => 25 °C; 5 V => 50 °C
Note: This is true only for the default settings.
For further characteristics see: Configuration in detail
– HW-Setpoint
CA-AUX-SETPOINT
– Input (X1-2)
Control Analog
– Auxiliary HW-SETPOINT
For future use. Do not connect.