To choose the type and number of batteries needed for 24, 60, or 72 hours of standby power based on the Amp Hours. Required calculation from section 6.8 XR500 Series Power Requirements, perform the following:
Install the number of batteries shown in the corresponding No. of Batteries required column.
Example: If the Amp Hours Required calculation equals 22 Ah for 24 hours of standby time and 4.5 Ah batteries are desired, install six (6) Model 368 (12 Vdc, 5.0 Ah) batteries.
Note: You can use a Model 327 Plug-in 50 VA or Model 322/323 Wire-in 56 VA with up to 36 Ah of batteries. The Model 324/324P Wire-in 100 VA Transformer may be used with any of the battery choices listed below. For listed installations, all batteries shall be installed in a DMP Model 341, 349, 350 or 352S enclosure and all wiring shall run through conduit. The enclosure shall be installed to the left of the XR500 Series enclosure to ensure Battery and AC wire separation..
Select the desired standby hours required from the table below: 24, 60, or 72 hours
Select the desired battery size: Model 368 (12 Vdc 5.0 Ah), Model 369 (12 Vdc 7 Ah),
Model 365 (12 Vdc 9 Ah), Model 366 (12 Vdc 18 Ah), or Model 364 (12 Vdc 1.3 Ah) when used in the Model 341 enclosure.
Select a Max. Ah Available number that is just greater than the number calculated in Amp Hours Required.
Note: If the Amp Hours Required calculation is greater than any Max. Ah Available number shown on a table, then add power supply(s) to power some system devices allowing the Amp Hours Required calculation to be reduced. See the 710 Bus Splitter/Repeater Installation Guide (LT-0310)