User's Manual

6-14 Aviat Networks
Chapter 6. Installing the INU and INUe
Where a fan air filter is to be installed, install it prior to installing the FAN plug-in.
7. Install the CompactFlash card in the NCC plug-in; withdraw the NCC and insert in
the socket on the right side of the PCB.
8. Fit the IF cable between the RAC(s) and IRU 600 RFU(s). IF cables are supplied
with the IRU 600.
Fit the DAC tributary cables.
For a DAC 16x, ensure correct orientation of the Mini RJ-21 connector
before pushing it home. This can be checked by the scalloped key to one
side of the connector. Additionally, a trib cable supplied by Aviat Networks
will have the cable exiting to the right side when viewed from the front.
Do NOT over-tighten the Mini RJ-21 retaining screws.
The following steps describe the procedure for preparing the power cable, and
preparing for power-on. Do not connect the power until all steps have been
completed.
9. Run the supplied power cable through to the power pick up point, which will
normally be at a circuit breaker panel in the rack. A circuit breaker (or fuse) should
have a capacity of 12 A for the INU and 25 A for the INUe.
10. For a -48 Vdc supply, connect the blue wire to -48 Vdc (live), and the black wire to
ground/+ve. (Power input on the NCC and NPC is polarity protected).
11. For a +24 Vdc supply, connect the blue wire to+24 Vdc (live), and the black wire to
ground/-ve. (Power input on the PCC is polarity protected).
12. Measure the voltage on the dc power connector.
• For -48 Vdc operation the voltage should be -48 Vdc, +/-2 Vdc for a non battery
floated supply, and nominally -56 Vdc for a battery floated supply. (Limits are
-40.5 to - 60 Vdc).
• For +24 Vdc operation the voltage should be 24 +/- 2 Vdc for a non battery floated
supply, and nominally 30 Vdc for a battery floated supply. (Operating limits are
20 to 36 Vdc).
This product meets the global product safety requirements for SELV
(safety extra-low voltage) rated equipment and the input voltage must
be guaranteed to remain within the SELV limits (60 V maximum) in the
event of a single internal fault.
Always check the integrity of the dc power supply to an INU/INUe right
to its source. Never assume that the supply provided to the pick-up point
in a rack is correct.