User's Manual

D-MBR 3707-3708 PS NFPA CLASS B SIGNAL BOOSTER
PRODUCT DESCRIPTION AND USER’S MANUAL
www.cobham.com/wireless Cobham Wireless – Coverage
Date: 6-Set-15
Page | 28 Doc. No. 00060CDUM Rev. 1.0
4.2 Charger Architecture
D-MBR installation with the Battery Charger is illustrated below. The Charger is AC powered. It
simultaneously provides a 48 VDC output power to the booster and charges the external battery
(external battery not provided).
The Charger supports three dry contact alarms that are connected to the Fire Department Control
Box:
• AC Input Fail*
• Low Battery
• Battery Charger Fail*
As long as the AC power source is available, the
Charger provides 48 VDC to the booster and
maintains the external battery fully charged.
If the AC power source to the charger fails, the
external battery provides the 48 VDC power to the
Booster and the
AC Input Fail Charger alarm is activated.
Figure 4-2. D-MBR PS NFPA with Charger Architecture
*Optionally, Battery Charger Fail and AC Input Fail can be connected to the Booster alarm connector for
monitoring).