> For the complete documentation index, see [llms.txt](https://docs.efento.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.efento.io/nb-iot-loggers/installation/logger-specific-installation-guidelines/pulse-counters-wiring.md).

# Pulse counters wiring

## Wiring scheme

Efento pulse counters support up to three separate channels. The wiring configuration varies depending on the number of channels in use.

<figure><img src="/files/MIROvbWzXlmEmNKML0oK" alt="" width="563"><figcaption></figcaption></figure>

The pulse counters support devices that provide dry-contact (SO) pulses. Connect the pulse-generating device to the Efento counter using the **CH** and **GND** pins (for multi-channel counters: CH1–GND, CH2–GND, CH3–GND).

<figure><img src="/files/BLzSqhZv8dg8vwiPflEF" alt=""><figcaption></figcaption></figure>

## **Electricity Meter Connection**

When connecting to an electricity meter, wire the Efento pulse counter to the meter’s SO output.

<figure><img src="/files/t9kN7ORFNHWTaJ7orF4H" alt=""><figcaption></figcaption></figure>

{% hint style="danger" %}
**DANGER – Risk of Electric Shock**

To prevent electric shock:

1. Turn off all power sources and equipment before making connections.
2. Attach all cables to the devices while power is off.
3. Turn on all power sources only after connections are complete.

Always read and follow the user manual of the electricity meter being connected to the Efento pulse counter.
{% endhint %}


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