# Xemex Smart Connect

> Supported devices: Xemex Smart Connect P1/A1 and Smart Connect TIC

Source: https://voltmasters.io/en/docs/device-integrations/energy-meters/xemex/

The **Xemex Smart Connect** is a bridge, not a meter: it reads the utility meter through its customer port and republishes the values over **Modbus TCP**. Our EMS reads those values, so the utility meter at the grid connection can be used without a separate energy meter.

### Supported devices

-   **Smart Connect P1/A1**: reads the P1 or A1 port of the utility meter (DSMR 4.2 or later in the Netherlands, EMUCS in Belgium)
-   **Smart Connect TIC**: reads the TIC port of an Enedis meter in France

> **Note**
>
> Xemex Smart Connect support is available from EMS controller version **0.0.335**.

> **Warning**
>
> This is a monitoring-only integration. The EMS reads measurements from the Smart Connect and cannot control anything through it.

### EMS functionality

With the current integration, our EMS enables:

-   Monitoring of active, reactive and apparent power, voltage, current and power factor
-   Monitoring of total imported and exported energy
-   Use of the meter as a grid connection meter or as a submeter, like any other supported meter
-   Scaling of the values on a transformer metered connection

Additional functionality may be added over time as integration capabilities evolve.

## Setup

1. **Connect the Smart Connect**
   
   Connect the Smart Connect to the customer port of the utility meter and to the same network as the Voltmasters Controller, and give it a fixed IP address.
   
   > **Note**
   >
   > Follow the Xemex manual for installing the Smart Connect on the meter and for its network settings.
2. **Add the meter in the platform**
   
   Add a device of type **Energy meter**, brand **Xemex** and model **Smart Connect P1/A1** or **Smart Connect TIC**. Fill in the IP address and the port of the Smart Connect. The **Slave ID** is prefilled with `1`: the Smart Connect ignores the unit ID and answers on any value.
3. **Set the transformer ratios**
   
   On a transformer metered connection the utility meter sits behind instrument transformers and reports secondary values. Fill in the two ratios so the EMS lifts the values to the primary side:
   
   -   **Current transformer ratio (TI)**, for example `10` for 50/5 A
   -   **Voltage transformer ratio (TP)**, for example `100` for 11000/110 V
   
   Both are prefilled with `1`, which is correct for a directly connected meter. They can also be changed later in the device settings.

### Known limitations

-   **One Modbus client at a time.** The Smart Connect accepts a single Modbus TCP client. Make sure no other system polls it at the same time.
-   **Firmware older than V5.1.** Older firmware reports the energy counters in kWh instead of Wh, and the firmware version cannot be read over Modbus. On such a unit the imported and exported energy read a factor 1000 too low. Check the firmware version of the Smart Connect when you install it.
-   **DSMR 4.2.** A DSMR 4.2 meter sends no voltages, so voltage reads 0, and it refreshes its values every 10 seconds instead of every second.
-   **Smart Connect TIC.** TIC reports an exporting phase as 0 W while the total still goes negative. The EMS therefore only uses the total power of a TIC meter and shows no power per phase.