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Mounting Diagram
35mm DIN rail mounting: Mount the sensor module onto the DIN rail (dark black) as shown in the figure.
Board Mount
Mount the PCB to the enclosure with screws. Mounting hole diameter is 3mm.
Correction Method
1.
After the module is powered ON, measure voltage value of the positive end of C1. Then adjust the VR1 potentiometer to make the positive end of
C3 of same voltage value as C1, the zero adjustment is completed. At this time, ensure the analog output voltage at the CT end should be 0V.
There may be a deviation of about 20 mV, which belongs to the normal range. (The zeroing of potentiometer has been factory set and generally
does not need adjustment.)
2.
After zero adjustment is completed, connect the current input terminal. Adjust the VR2 potentiometer accordingly that the analog output of
CT reaches 0 5 V, corresponding to 0 35 A's linear relationship. The corresponding relation between output voltage and detection current is
shown in Electric Diagram image.
Notes
1.
Do not exceed the voltage rating of the relay. It can cause the relay malfunction and/or reduces the service life.
2.
Ensure the current flows in the direction of the arrow above the sensor. If the current direction is reversed, the module will not produce an output.
3.
The modules are tested with pure resistance loads when they leave the factory. If user uses inductive or capacitive loads, the detected current will
be offset. Use the above correction method to set this.
4.
VR3 is a threshold adjustment potentiometer. Point A on the board is the threshold voltage test point. When the potentiometer is adjusted, the
voltage of point A will change accordingly (clockwise to decrease, counterclockwise to increase).
Example: Analog output voltage of 0 35 A current regulator is 0 5 V. If user need 7 A output switch signal, the voltage of point A to ground
should be adjusted to 1 V. To prevent the relay repeatedly pull in at the critical point, the voltage should be slightly lower than 1 V, can be adjusted
to about 0.97 V. Currents that increase slowly or are just above the set point can cause repeated actuation and potential damage to the relay.
5.
Re-calibration is suggested whenever error occurs after a long period. Please refer to the above correction method for detailed operations.
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