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 | 34 Doc. No. 00060CDUM Rev. 1.0
4.4.7.1 Alarm Dry Contact Output Restrictions
• Maximum switching voltage: 220 VDC, 125 VAC
• Maximum switching current: 2A
4.4.7.2 External Alarm Input Restrictions
• Maximum repetitive reverse voltage: 28 V
• Impedance load: 470 Ohm
“0” - 0V
“1” - 3.8V - 28V
4.4.7.3 Charger Alarm Connector Pinout
Each alarm status is recognized by a separate wire-pair, where the colored wires are internally
connected with a 4.7 K ohm resistor (serves as a pull up resistor to +5V. The following figure shows
the Alarm connector pinout.
NOTE: The two external alarms can be used to connect dry-contacts BAT LOW and PSU Fail from
either the UPS or Battery Charger. It is required to configure connected external alarms according to
section 5.5
Figure 4-9. Charger Alarm Connector Pinout
Pin No. Signal Name Wire Colour Contact Type
1 BAT_LOW #2 Black dry-contact NC
2 BAT_LOW #1 Red dry-contact NC
3 PS_FAIL #2 Grey dry-contact NC
4 CHG_FAIL #2* Green dry-contact NC
5 AC INPUT FAIL* Orange NOT A DRY CONTACT – TTL TYPE
6 PS_FAIL #1* Blue dry-contact NC
7 CHG_FAIL #1* Brown dry-contact NC
TBD PSU_LOW_TO_BDA TBD NOT A DRY CONTACT – TTL TYPE
* Can be optionally connected to the following Booster Alarms connector Pin-1 (External Alarm #1) and Pin-2
(External Alarm #2) and Pin-5 (GND for both). Refer to section 3.8.2 for the Booster Alarm pinout.