XB005XPDR External Battery Pack, DIN-Rail mountingStandard configurationThe BVS240XDPDR & BVS480XDPDR DIN-Rail Power Modules must both be equipped with at least one XB005XPDR to function as a full-fledged DIN-Rail 24V DC Uninterruptible Power Supply.Extend runtimeBy connecting two, three or max four XB005XPDR external battery packs to the associated BVS DIN-Rail Power Module instead of one, you can easily increase the number of minutes that the DIN-Railemergency power supply can independently supply backup power. A runtime of 30 minutes at 480 watt load is even possible.