6
Installing a Redundant Power Supply
The redundant DC power supply is a separately orderable product. Refer to the
instructions that came with the power supply,
DC Power Supply for 9000 Series Access
Carrier Installation Instructions, Document No. 9000-A2-GN1L, for installation
information.
Alarm Relay Connector
The access carrier provides two independent alarm relays for:
H
System alarm – Connects to the local central office alarm system to report major
and minor alarms, up to 60 VDC and 0.1 amp. Do not exceed these levels when
connecting an alarm to the product.
H
Power supply alarm – Consists of an SPDT (Single Pole Double Throw) relay
with terminals that are available for connection to external alarms (common,
normally open, and normally closed). This is used to detect the failure of the power
supply in redundant configurations. The relay is energized when a fault is detected
in either of the redundant power supplies.
After making any necessary connections to your alarm system, plug the connector that
you received in the box with the housing into the socket on the power I/O card.
99-16458
Rear View with
Power I/O Card
THIS CLASS A DIGIT
AL APPARA
TUS MEETS
ALL REQ
UIREMENTS OF
THE CANADIAN
INTERFERENCE-CA
USING EQ
UIPMENT
REGULA
TIONS.
CET APP
AREIL NUMÉRIQ
UE DE LA CLASSE A
RESPECTE
TOUTES LES EXIGENCES
DU REGLEMENT SUR LE MA
TÉRIAL
BROUILLER DU CANAD
A.
THIS DEVICE COMPLIES
WITH PA
RT 15 OF
THE
FCC RULES
. OPERA
TION IS SUBJECT
TO THE
FOLLOWING
TWO CONDITIONS:
(1) THIS DEVICE
MAY NO
T CAUSE HARMFUL INTERFERENCE.
AND (2)
THIS DEVICE MUST A
CCEPT ANY
INTERFERENCE RECEIVED
, INCLUDING
INTERFERENCE
THAT MA
Y CAUSE
UNDESIRED OPERA
TION.
ALARM
RELAYS
COM
NO
NC
COM
NO
NC
-48V / +24V
RETURN
-48V / +24V
RETURN
A
B
SYSTEM
POWER
FG
TO BE INST
ALLED
ONLY IN RESTRICTED
ACCESS LOCA
TIONS
ALARM
RELAYS
COM
NO
NC
COM
NO
NC
SYSTEM
POWER
NAM Fan Tray
A fan tray for the NAMs is used so that the ambient temperature remains within the
acceptable range. A replacement fan tray is available as a separately orderable
product.