T-Series Traffic Director Installation, Configuration and Administration Guide
2-23
Connecting and Disconnecting DC Power
•
“Connecting a DC Shelf to Power”
•
“Turning On DC Power to the System”
•
“Turning Off DC Power to the System”
For procedures related to AC power, see
“Connecting and Disconnecting AC Power”
Note:
The T1000 includes two power supplies, but functions properly with a single
power supply. Bytemobile recommends connecting both power supplies (to
independent power sources) for redundancy.
Before you Begin DC Power Connection
Before you begin the power connection/disconnection procedures, note the following:
•
Review the safety warnings in this document.
•
Review the electrostatic discharge (ESD) guidelines earlier in this document.
•
Review the DC power specifications in the T1000 specifications document.
•
The following guidelines are provided for connecting to the -48 V DC power source.
It is the customer’s responsibility to supply the necessary power cable.
–
Intrabuilding Cabling
: The intrabuilding port(s) of the equipment or subassembly
is suitable for connection to intrabuilding or unexposed wiring or cabling only. The
intrabuilding port(s) of the equipment or subassembly MUST NOT be metallically
connected to interfaces that connect to the OSP or its wiring. These interfaces are
designed for use as intrabuilding interfaces only (Type 2 or Type 4 ports as
described in GR-1089-CORE, Issue 5). They require isolation from the exposed
OSP cabling. The addition of Primary Protectors is not sufficient protection in order
to connect these interfaces metallically to OSP wiring.
–
Common Bonding Network
: The T1000 is intended for installation into a Common
Bonding Network (CBN).
–
Grounding and Bonding Conductor Specification
: Use 10 AWG Conductor IE: 8
AWG. The actual wire gauge and terminal size will be determined by the current
draw and the length of wire run or as specified by the customer premises guidelines.
Conductor must be copper (aluminum not allowed). Use Panduit part number
LCA10-10F single-hole compression lug. (UL Listed). Use lock washer to ensure
antirotation. Apply antioxidant coating to conductor before crimping on the listed
single hole compression lug.
–
Overcurrent Protection
: The power source must have a minimum of 30 A
overcurrent protection. See article 240, paragraph 3, table 310-16 of the National
Electric Code for more information about electrical wiring requirements.
–
The DC-power inputs are configured for DC isolated return (DC-I). The DC
RETURN (RTN) terminal or conductor is not connected to the equipment frame or
the grounding means of the equipment.
–
The overcurrent protective device or circuit breaker must be accessible to service
personnel to prevent the power from being turned on by someone other than the
technician servicing the T1000 unit.
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