A spare metal enclosure is available for those installations where additional xGen zone and/or output expanders are required or in case a backup battery is needed up to 12Vdc / 18Ah. The xGen NXG-003 metal enclosure includes a tamper switch and one metal DIN rail. A second metal DIN rail can be added if required but in that case a backup battery of max 12Vdc / 7Ah will fit the enclosure. To install an expander module, release the locking tab(s) and place it on the DIN rail. Push the locking tab(s) to secure the expander module.