Cisco Remote PHY Shelf 7200 Installing page 29

Installing the Cisco Remote PHY Shelf 7200
• Each DC input power cable is terminated at the rear of the Power Shelf on the terminal block by a cable
• To avoid hazardous conditions, all components in the area where DC input power is accessible must be
Required Tools and Equipment
• Insulating sleeving
• Torque wrench
• 7/16" hex socket
• Lugs for the cables
• Cables for positive and negative leads
• Crimping tool
Step 1
Ensure that the power switch on the DC power shelf is in off (down) position.
Step 2 Attach the lug to the lead cable. Carefully crimp the receptacle around the cable using the crimping tool. Insulate the
entire 90 degree portion of the lug with shrink sleeving for each lead wire.
Step 3
Remove the terminal block cover on each terminal block by pushing down on the bottom tab then pivoting the bottom
out.
Step 4
Loosen the 1/4-20 terminal bolts using a torque wrench and 7/16" hex socket and remove them.
Step 5 Connect the negative lead cable and secure it in place with the 1/4-20 terminal bolts using a torque wrench and 7/16" hex
socket with a torque of 45-50 in-lb (5.08-5.65 Nm).
leads, source DC (-) and source DC return (+), can be used for each DC Power Module. These cables
are available from any commercial cable vendor. All input power cables for the chassis must have the
same wire gauge.
lug (included in the accessory kit). The cable lugs must be dual-hole, and have a 90 degree tongue
(reference Panduit LCD4-14AF-L). They must be able to fit over 1/4-20 terminal studs on 0.625 in (15.88
mm) centers and have a maximum tongue width of 0.6 inches.
Note DC input power cables must be connected to the Power Shelf terminal studs in
the proper positive (+) and negative (-) polarity. Some DC cable leads are labeled,
which is a relatively safe indication of the polarity. However, you must verify
the polarity by measuring the voltage between the DC cable leads. When
measuring the voltage, the positive (+) lead and the negative (-) lead must always
match the (+) and (-) labels on the power distribution unit.
properly insulated. Therefore, before installing the DC cable lugs, ensure to insulate the lugs according
to the manufacturer's instructions.
Caution Before installing the DC cable lugs, insulate the entire 90 degree portion of the
lugs where the wire is crimped to avoid hazardous conditions where DC input
power is accessible through the terminal block cover of the DC Power Shelf.
Connecting Power to the DC-Powered Cisco Remote PHY Shelf 7200
Installing the Cisco Remote PHY Shelf 7200
29