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KNX Gateways for Alarm Systems / NXG-KNX User Manual

Troubleshooting

Diagnostic checks, Factory Default Reset and KNX administration for the NXG-KNX alarm gateway.

elausys · 18 September 2026
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SymptomChecks
Gateway webpage unavailableCheck auxiliary power, cable, the Network LED and IP settings. Factory IP is 192.168.1.51.
Network on but Connected offCheck Device IP, alarm user “knx”, its PIN, UltraSync and Status Broadcast. With an NXG-7002 card, check the ETH LAN connection and isolation described in Alarm system setup.
Connected on but no KNX dataCheck KNX wiring, physical address, application download and group-address assignments. Read Firmware and Module status.
Wrong zones or areasCheck zone count, zone offset, area count and Area mapping.
Status or scenes missingCheck enabled objects, Send area status and scene assignments. A scene value of 0 disables its recall.

Factory Default Reset

To restore the factory defaults, toggle KNX programming mode four times in succession within 30 seconds using the KNX programming button on the front of the gateway. On the fourth toggle, the Network status LED flashes three times before the module resets. All parameters, including network settings, return to their default configuration. The gateway is then accessible at its fixed IP address, 192.168.1.51. The ETS application remains loaded and does not need to be downloaded again.

KNX status and programming mode

The gateway administration page also displays the KNX bus status and allows you to switch KNX programming mode on or off.

Frequently Asked Questions

What should I check when the alarm connection does not work?

Create the alarm user “knx”, use its PIN in ETS, and enable UltraSync and Status Broadcast. Set the gateway Device IP to the alarm IP address.

What should I check when alarm communication works but KNX data is missing?

Verify the KNX connection, the loaded ETS application and the group-address assignments. Read the Firmware object and test the required supported objects in ETS Group Monitor.

How do I perform a Factory Default Reset?

Toggle KNX programming mode four times within 30 seconds using the front-panel KNX programming button. On the fourth toggle, the Network status LED flashes three times before the gateway resets.

What happens to the settings and ETS application after a reset?

All parameters, including network settings, return to their defaults. The gateway is accessible at 192.168.1.51. The ETS application remains loaded and does not need to be downloaded again.

Can I check KNX bus status and change programming mode from the administration page?

Yes. The gateway administration page displays the KNX bus status and lets you switch KNX programming mode on or off.

Keep exploring

Find the other guides for this product in the documentation.

Back to NXG-KNX User Manual