User's Manual

VOLUME II, CHAPTER 1, SYSTEM OVERVIEW
Figure 1-15.
NCC
The NCC is a mandatory plug-in for an INU/INUe. It performs key node man-
agement and control functions, and provides various dc rails from the -48 Vdc
input. It also incorporates a plug-in flash card, which holds Node configuration and
license data.
Power input limits are -40.5 to -60 Vdc. The power connector is a D-Sub M/F 2W2.
The +ve dc return pin is connected to chassis ground.
Figure 1-16. NCC
FAN
The FAN is a mandatory plug-in. There are two variants, 2RU and 1RU. Each is
fitted with two long-life axial fans plus monitoring and control circuits.
One 1RU FAN is fitted in an INU.
One 2RU FAN or two 1RU FANs are fitted in the INUe. The 2RU FAN is standard.
Figure 1-17. FAN (1RU)
NPC
NPC provides redundancy for the NCC backplane bus management and power
supply functions.
Figure 1-18. NPC
PCC
The PCC provides a voltage conversion function for use at locations where the power
supply is +24 Vdc. It converts +24 (19 to 36) Vdc to -56 Vdc for connection to the
26 AVIAT NETWORKS