COBHAM D-MBR 3707 User Manual

D-MBR 3707-3708 PS NFPA CLASS A SIGNAL BOOSTER
PRODUCT DESCRIPTION AND USER’S MANUAL
Cobham Wireless – Coverage
Date: 17-Jan-16
www.cobham.com/wireless
Doc. No.00060CDUM Rev. 1.1 Page | 29
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 capacity
• Charge Fail
As long as the AC power source is available, the
Charger provides 32 to 72 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. When the battery reaches 70% at current
consumption of ~ C/25, BATTERY LOW indication is provided.
NOTE: The Battery Charger AC Input Fail dry-contact can also be connected to the Booster (this
requires the appropriate setup configuration).
Figure 4-2. D-MBR PS NFPA with Charger Architecture

COBHAM D-MBR 3707 Specifications

General

Brand	COBHAM
Model	D-MBR 3707
Category	Extender
Language	English