> 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/inserting-the-sim-card-and-powering-on.md).

# Inserting the SIM card and powering on

Before deploying the device, you must install a Micro SIM card (3FF) and establish power. The installation steps differ depending on your logger's power configuration and enclosure type (IP30 or IP67).

## Inserting the SIM card and powering on

{% stepper %}
{% step %}

### Open the enclosure and insert the SIM card

The SIM card slot is located directly on the Printed Circuit Board (PCB). To access it, you must open the logger’s enclosure.

1. Open the casing:
   * **IP30 Enclosure**: Use a flat tool or screwdriver to gently pry open the back panel of the enclosure.
   * **IP67 Enclosure**: Unscrew and remove the external screws securing the front and back panel together to open the housing.
2. **Locate the SIM slot**: Find the Micro SIM holder on the PCB.
3. **Insert the SIM card**: Slide open the SIM card slot mechanism, insert the Micro SIM (3FF) card with the golden contacts facing down, and snap the slot mechanism back into the locked position.

<figure><img src="/files/EPds8sCnI7UimncGT2w1" alt="" width="375"><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### Connect the power supply

Depending on your logger's power supply type and enclosure, configure the power using one of the methods below:

#### **Replaceable battery version (ER26500H + SPC1520)**

**IP30 & IP67 Enclosures**: The battery pack comes pre-installed and connected to the board. No additional wiring or physical battery installation is required from the user.

#### **External power supply version - IP30 Enclosure (USB-C)**

Connect a certified **5V, 1A USB-C** power supply directly through the dedicated access hole located on the side of the enclosure.

<figure><img src="/files/F2C9pTWxswHfWR6gVOxv" alt="" width="375"><figcaption></figcaption></figure>

#### **External power supply version - IP67 Enclosure (9-26V DC Terminal power)**

1. Remove the internal protective plastic cover (secured by 2 screws)<br>

<figure><img src="/files/OPEvjV4cnAfLleFiK42t" alt="" width="375"><figcaption></figcaption></figure>

2. Unplug the power board connector<br>

<figure><img src="/files/UaSpJckZR1nrfDBDM5CE" alt="" width="375"><figcaption></figcaption></figure>

3. Lift out the PCB
4. Thread the external power wires through the bottom cable gland of the enclosure. Ensure the cable is guided carefully through the designated cut in the internal plastic shield before securing the wires to the screw terminal block.<br>

<figure><img src="/files/aJjj35gImv96AckX0jQm" alt="" width="375"><figcaption></figcaption></figure>

5. Connect the wires to the + and - positions on the screw terminal block. **Double-check the + (positive) and - (negative) markings on the terminal block before applying voltage**.<br>

<figure><img src="/files/aDIjIumnFBMZIMEiw8jI" alt="" width="375"><figcaption></figcaption></figure>

6. Connect the power board connector, seat the mainboard firmly back into its designated position, place the internal plastic cover over the board, and secure it tightly using the two screws.
   {% endstep %}

{% step %}

### Power on the device

Once the SIM card is locked in place and power is supplied (either via battery or wire connection):

1. Press and hold the **power button for 2 seconds**.
2. Verify that both **LEDs on the board begin to blink**, indicating the device has successfully initialized and is searching for the network.<br>

   <figure><img src="/files/w7Wvy03jYwwIjfDfyQ3p" alt="" width="375"><figcaption></figcaption></figure>
3. Reassemble the enclosure. For IP67 versions, ensure the sealing gasket is properly seated and evenly tighten all external screws to maintain water resistance.
   {% endstep %}
   {% endstepper %}

## Installation safety guidelines

* **Disconnect power first**: Never attempt to connect or screw down the 9-26V DC power wires while the external power source is live. Ensure your supply line is turned off before wiring the screw terminals.
* **Polarity Check**: Double-check the + (positive) and - (negative) markings on the terminal block before applying voltage. Reversing the polarity may permanently damage the logger's circuitry.
* **Keep gaskets clean (IP67)**: Ensure that no dirt, dust, or wires compromise the perimeter rubber gasket when re-sealing an IP67 enclosure. A faulty seal will allow moisture ingress, leading to device failure.

For the complete list of safety protocols, electrical risk assessments, and handling procedures, please refer to the [Safety guidelines page](/nb-iot-loggers/general-information/safety-guidelines.md).


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