Installing Power Supplies
7750 SR-12
Page 65
I
NSTALLING
DC PEM
S
DC
This section provides information and instructions to perform the following:
•
DC Power Warnings and Notes on page 65
•
Installing a DC PEM on page 67
→
Installing a DC PEM on page 67
→
DC-Input Power Wiring on page 69
→
Preparing the Power Cable on page 69
→
DC Input Terminal Block Wiring on page 71
DC P
OWER
W
ARNINGS
AND
N
OTES
Danger:
• The unit should be connected to a DC branch circuit with a maximum 80A circuit breaker or
fuse which meets the requirements for branch circuit protection. A suitable disconnect device
must be provided in the DC branch, either a circuit breaker or switch that can be employed to
disconnect power to the system during servicing.
• Confirm that the DC power source is OFF during installation. The power source should be a
safety extra-low voltage (SELV) source.
• The 7750 SR-12 router with DC power entry modules should be installed only in restricted
access areas (such as dedicated equipment rooms and electrical closets) in accordance with
Articles 110-26 and 110-27 of the most recent National Electrical Code ANSI/NFPA 70.
• Before connecting or disconnecting ground or power wires to the chassis, ensure that power
is removed from the DC circuit.
Caution:
• The 7750 SR-12 must be directly connected to the DC power supply system earthing
electrode conductor or to a bonding jumper from an earthing terminal bar or bus to which the
DC power supply system earthling electrode is connected.
• The DC power supply source must be located within the same premises as this equipment.
• There must be no switching or disconnecting devices in the earthed circuit conductor
between the DC source and the point of connection of the earthing electrode conductor.
Summary of Contents for 7750 SR-12
Page 1: ...7750 SR 12 INSTALLATION GUIDE Document Part Number 93 0019 01 December 2003 ...
Page 6: ...Page 4 7750 SR 12 Table of Contents ...
Page 14: ...Page 12 7750 SR 12 ...
Page 84: ...Monitoring AC Power Page 82 7750 SR 12 ...
Page 100: ...Establishing Router Connections Page 98 7750 SR 12 ...
Page 150: ...Impeller Trays Page 148 7750 SR 12 ...