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There is a small convenience DIN Rail located inside the V3 BBU which can be used for third party DC-DC
converter module mounting (used to convert 48VDC to 12VDC or 24VDC output). A common application is to
feed a 3
rd
Party DC-DC converter module from the BDA/MU/RU 48VDC output. See Figure 46 below.
Do not connect any battery outputs directly to the DC-DC converter module!
Figure 46: Mounting and Wiring DC/DC/Converter to V3 BBU Convenience DIN Rail
Note: A common application utilizing the above DC/DC converter configuration is when an authority
requires a 12VDC Auto-dialer.
See the technical application note in Appendix H for more details on connecting an auto-dialer to a
Comba V3 BBU.
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