DC 24V 25mA 1 Channel Voltage Comparator Module Based on LM393N Chip

Channel difference is small, more accurate, 0.1V resolution accuracy. There are three versions of 5V / 12V / 24V optional.
Input a voltage compared with the reference voltage (reference voltage through precision multi-turn potentiometer partial pressure get),the input voltage is greater than the reference voltage, the relay pull, the circuit connected, at the same time the work of the corresponding channel indicator light.
Input a voltage compared with the reference voltage (reference voltage through precision multi-turn potentiometer partial pressure get), the input voltage is less than the reference voltage, the relay pulls, the circuit is connected, at the same time the work of the corresponding channel indicator light.
Function 1: Input voltage and setting voltage between the comparison, the Input voltage is greater than the setting voltage, the circuit is turned on, while the corresponding channel work indicator light; Function 2: Input voltage and setting voltage between the comparison The input voltage is less than the set voltage , the circuit is turned on, while the corresponding channel work indicator light;
Module uses: automotive circuit modification, industrial equipment, experimental testing, circuit application testing.
Module Name: 1-way Voltage Comparator Module.
Operating voltage: DC 12V
Typical operating current (relay pull state): DC12V 25mA;
Standby current (relay closed): about 5uA;

Function description (three functions):
Function 1:
Input a voltage and set the reference voltage on the module (the reference voltage can be set through the adjustable potentiometer) contrast;
When the input voltage is greater than the reference voltage, the relay is closed, the circuit connected;
When the input voltage is less than the reference voltage, the relay is disconnected and the circuit is disconnected.

Function 2:
Respectively inputting two voltage signals A and B to be compared;
When the voltage signal A is greater than the voltage signal B, the relay is closed and the circuit is switched on;
When the voltage signal A is smaller than the voltage signal B, the relay is opened and the circuit is disconnected.
Note: Function 2 requires that the jumper cap of the corresponding channel be unplugged.

Function 3:
Contrary to function 1, disconnect the jumper cap shown in the diagram and short-circuit the back contact in the diagram.
Input a voltage and set the reference voltage on the module (the reference voltage can be set through the adjustable potentiometer) contrast;
When the input voltage is less than the reference voltage, the relay is closed, the circuit connected;
When the input voltage is greater than the reference voltage, the relay is disconnected and the circuit is disconnected.

Reference voltage:
The reference voltage of the module is the input voltage after multi-turn precision potentiometer partial pressure obtained, the input voltage value determines the range of reference voltage value. For example, the input voltage is 12V, then the reference voltage adjustable range is 0-12V.