---
title: "Wire Pool’nX: KNX bus, 9-30 V DC power supply and Ethernet"
description: "Mount Pool’nX on a DIN rail and connect the KNX bus, the 9-30 V DC power supply and Ethernet: specifications, connectors, LEDs and wiring diagram."
canonical: https://wiki.can-nx.com/en/guides/pool-install-wiring/
language: en
product: Pool’nX
audience:
  - administrateur
  - installateur
context: "Pool’nX gateway, Klereo and PoolCop variants: cabinet mounting, connectors and front panel"
---

# Wire Pool’nX: KNX bus, 9-30 V DC power supply and Ethernet

Context: Pool’nX gateway, Klereo and PoolCop variants: cabinet mounting, connectors and front panel

:::note[Step 1 of 8 · Pool’nX commissioning]
**Next step:** [Commission Pool’nX: add and initialize the gateway in Can’nX Cloud](https://wiki.can-nx.com/en/guides/pool-install-cloud/)

[All commissioning steps](https://wiki.can-nx.com/en/demarrer/poolnx/)
:::

Pool’nX mounts on a DIN rail and connects to three things: the KNX bus, a 9-30 V DC auxiliary power supply and an Ethernet network with Internet access. The specifications, connectors and diagram below apply to both the Klereo and PoolCop variants.

Intended for the installer preparing the electrical cabinet. Once the gateway is wired, follow [commissioning in Can’nX Cloud](https://wiki.can-nx.com/en/guides/pool-install-cloud/).

## Technical specifications

| Specification | Value |
| --- | --- |
| KNX bus | KNX TP, S-Mode (ETS), 30 V, 5 mA |
| Auxiliary power supply | 9-30 V DC, 2 W |
| Network | Ethernet 10/100 Mbit/s, RJ45 socket |
| Mounting | DIN rail, 2 modules |
| Dimensions | 35 mm wide, 90 mm high, 70 mm deep |
| Operating temperature | -25 °C to +55 °C |
| Installation location | Watertight cabinet |

## Locate the connectors and the front panel

![Pool’nX from the front and from the side: KNX terminal block at the top, DC IN and Ethernet connectors at the bottom, switches, LEDs and SD card reader on the front panel, DOC QR code on the front and identification QR code on the side](https://wiki.can-nx.com/media/en/pool-install-wiring/pool-nx-faces.webp)

| Marking | Location | Role |
| --- | --- | --- |
| **KNX** + and − | Top terminal block | Connection to the KNX bus |
| **DC IN 9 ... 30V** + and − | Bottom terminal block, left | Auxiliary power supply |
| **ETHERNET** | Bottom socket, right | Local network and Internet access |
| **PROTECT ON - OFF** | Front panel | In the ON position, blocks access to the configuration site and to the Pool’nX window |
| **UNMOUNT - MOUNT** | Front panel | Reserved for maintenance operations by support |
| **POWER** | Green LED, front panel | Power indicator |
| **MOUNTED** | Red LED, front panel | SD card status, according to the printed patterns **WORKING** and **REMOVE CARD** |
| **SD CARD** | Front panel | SD card reader for [KNX telegram logging](https://wiki.can-nx.com/en/guides/pool-local-monitoring/) |
| **USB** | Front panel | USB port |
| **DOC** QR code | Front label | Documentation QR code |
| Identification QR code | Side label | Identifier scanned when adding the gateway in Can’nX Cloud; the label also shows the MAC address and the serial number (S/N) |

Note the MAC address and the serial number before closing the cabinet: they let you add the gateway without scanning the QR code.

## Wire the gateway

1. Fix the gateway on the DIN rail of the cabinet.
2. Connect the KNX bus to the **KNX** terminal block, observing the + and − markings.
3. Connect the output of a 9-30 V DC power supply to the **DC IN** terminal block, + and −. The power supply must provide at least 2 W.
4. Connect the **ETHERNET** socket to a switch or to the Internet router with an RJ45 cable.
5. Switch on the power supply.

   ![Wiring diagram: 230 V AC power supply connected to the DC IN terminal block, KNX bus on the top terminal block, network cable on the Ethernet socket](https://wiki.can-nx.com/media/en/pool-install-wiring/pool-nx-cablage.webp)

The KNX bus is not needed for initialization in Can’nX Cloud: the power supply and Internet access are enough. Connected to the router, the gateway connects to the Can’nX cloud by itself, without any change to the local network settings.

## Check the result

- In Can’nX Cloud, after [commissioning](https://wiki.can-nx.com/en/guides/pool-install-cloud/), the gateway appears online in the project list.
- Its page shows its **Local IP address**, which opens [the local configuration site](https://wiki.can-nx.com/en/guides/pool-local-config/).
- On the page, **Protection mode** is not **Locked**: the **PROTECT** switch is set to OFF.

## Troubleshooting

| Symptom | Cause and action |
| --- | --- |
| The **POWER** and **MOUNTED** LEDs do not go out at startup | The gateway did not start correctly. Check the connections and the power rating of the power supply. |
| Gateway offline in Can’nX Cloud and local site unreachable | Check the 9-30 V DC, 2 W power supply, the RJ45 cable and the network’s Internet access. |
| Gateway offline in Can’nX Cloud, local site reachable | Enable DHCP on [the Network page of the local site](https://wiki.can-nx.com/en/guides/pool-local-config/) to test. Have the network administrator check that the gateway can access the Internet, and disable IPv6 for the devices on the router’s local network. |
| **Pool'nX** and **Advanced Configuration** buttons greyed out, **Protection mode** **Locked** | The **PROTECT** switch is set to ON. Set it to OFF. |

For other situations, see [Pool’nX troubleshooting](https://wiki.can-nx.com/en/guides/pool-help/). If the problem persists, write to support@can-nx.com with the gateway name, its serial number and the state of the LEDs.