WorldDSL-ETSI Fuse Alarm Panel (EFM-832)
Quick Installation Guide
Page 1 of 4
O
VERVIEW
The ADC
®
WorldDSL-ETSI Model EFM-832 Fuse Alarm Module protects shelf-mounted line
units from over current conditions at the exchange office power supply. The EFM-832 mounts
externally on the EMS-832 Exchange Office Management Shelf.
The exchange office power supply is connected to -48 Vdc inputs on the EFM-832 Fuse
Alarm Module. The fuse-protected outputs of the EFM-832 are connected to the -48 Vdc
inputs on the shelf.
An overcurrent condition at the exchange office power supply opens a protection fuse on the
EFM-832. An open protection fuse routes exchange office power to local alarms, signaling
the overcurrent condition.
P
RODUCT
D
ESCRIPTION
The EFM-832 Fuse Alarm Module is shown in
Figure 1
. Major components of the EFM-832
include:
• A fuse module cover with circuit-board mounted fuse holder, terminal strip, and
shelf-power wire leads.
• Two GMT type 10-ampere fuses.
Figure 1. EFM-832 Fuse Alarm Module
S
PECIFICATIONS
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Compatibility
Works with EMS-832 (16-slot, front connector access).
Power Input
Input Voltage Range
-36 Vdc to -72 Vdc
Fuses
Fuse Type
Buss GMT
Rating (Fuses A and B)
10 A