User's Manual

6-6 Aviat Networks
Chapter 6. Installing the INU and INUe
• The PCC must be connected to the NCC before applying power to the PCC to avoid a
current-inrush trip (overload) on the PCC.
• The PCC can be plugged into any INU/INUe option slot. It is not connected to the
backplane and is its function is not monitored within Portal.
• Where an NPC is fitted, two PCCs are required for +24 Vdc operation, one for the
NCC, the other for the NPC. This means an INUe must be used for NCC + NPC
operation.
• If the PCC front-panel LED is not lit, it indicates the existence of abnormal
conditions such as output under-voltage, output over-voltage, loss of input power,
output over-current, or open input fuse.
Power Cables
The INU power cable is included in the IDC Installation Kit. It is supplied with a D-sub
M/F 2W2 connector fitted at one end and wire at the other. The cable is nominally 5 m
(16 ft), and the wires are 4 mm
2
(AWG 12).
The cable is used for -48 Vdc connections to an NCC or NPC, or for +24 Vdc
connections to a PCC.
The blue wire must be connected to live (-48 Vdc or +24 Vdc); the black wire to ground
(+48 Vdc or -24 Vdc).
Figure 6-4. Power Cable and Connector
DC power connector can be shorted inadvertently if applied at an angle.
Always insert with correct alignment.
The PCC is supplied with a power cable to connect to an NCC or NPC.
Similarly, the power line filter unit is supplied with a power cable to connect to an NCC,
NPC, or PCC.
This cable is fitted with a D-sub M/F 2W2 connector at each end. Note that a standard
power cable is not included for the reason the cable supplied with an NCC (or NPC) is
not used when powered from a PCC, or via a power line filter, so the cable is re-used as
the power input cable for the PCC or filter unit.