Cisco ONS 15200 Series, Инструкция по установке, настройке и эксплуатации

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Cisco ONS 15200 Installation, Setup, and Test Manual
78-13765-01
Chapter 3 Installation
Figure 3-7 Fan unit
Step 2 Use four screws (M6 or UNC 12-24) to connect the fan unit to the equipment rack.
Step 3
Connect the power to the two fan unit -48 VDC power inputs located on the far right (primary) and far
left (secondary) of the fan-unit back panel (
Figure 3-8 ):
a. Insert each of the two wire ends into the cable plug (P/N 27-1769).
b.
Insert each cable plug into a power connector (primary and secondary) on the fan unit back panel.
Make sure that when inserting each cable plug, you obtain the correct polarity. When you are
viewing the fan unit from the rear, Pin 1 (on the left) is 0 VDC and pin 2 (on the right) is -48 VDC.
If the polarity is correct, continue with Step
3c . If the polarity is not correct, switch the two wires
inserted in Step 3a .
c. Tie-wrap the power cable to the fan unit.
Figure 3-8 Power and ground points on the ONS 15252 fan unit
Note If back access is not possible, you must connect the power before mounting the fan unit in
the rack.
Note
If you connect just one power supply to the fan unit, the fan unit will run but a minor alarm
will occur.
Step 4
Install the ground cable (P/N 72-3526). A pair of grounding pins (M4 screws) is located beside each of
the power connectors on the fan-unit back panel (
Figure 3-8 ). You must connect the grounding cable to
one of the pairs of screws. Choose the pair that is the most convenient connection point for your
installation. You can use either a single or double lug (see
Figure 3-9 ).
a. Use a screwdriver to remove one M4 screw (if you are using a single lug) or two M4 screws (if you
are using a double lug).
b.
Route the ground cable lug to the location where you removed the M4 screw(s).
c. Insert the M4 screw(s) into the ground cable lug opening(s).
d.
Use a screwdriver to firmly tighten the M4 screw(s) so that the ground cable is secure.
e. Use a multimeter that is set to read ohms to test the ground connection. The display on the
multimeter should be less than 5 ohms. If the display is more than 5 ohms, tighten or reconnect the
ground connection and test it again.
67443
1999
-48 V connector
(secondary)
Ground screws
- 48 V connector
(primary)