FMB125 Pulse Counter using DIN1 Cause Power Voltage Fluctuate

Teltonika Telematics
1

Hi,

I am connecting an always closed reed switch to the DIN1 on the FMB125 to use as a pulse counter. However I noticed there is fluctuations of power voltage when I connect the switch to the FMB125, when the power voltage fluctuate, I got a pulse count from the DIN1, even my switch is not trigger. May I know what is the cause for this?

Your input is very much appreciated.

<hank You

2

Hello @soonjoo

Please check the voltage and frequency of your source.

Note that the max frequency is 50hz and voltage threshold is 7.5V for DIN this is for FMX125 device.
Reference: Impulse counter - Wiki Knowledge Base | Teltonika GPS

Best Regards
Maynard C

4

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