User's Manual

Table Of Contents
Installation RF Path Elements CMA-331-AEN Page 103
Draft
Module
Quantity
Comment
HCM (for Standalone/Main IHU units) 1
In installations with more than one IHU, the HCM is installed in
one of the chassis which will be referred to as the “Main” HEU;
One HCM per system installation.
ACM (for Auxiliary IHU unit) 1
Installed in the IHU in configurations consisting of more than
one IHU chassis
PSM 1 - 2
For single power supply installations, install the PSM in either
(PSM) slot
RIX 1
OIX 1
RIM 1 8
Up to four in dedicated slots and up to four* in combo slots
No need to terminate unoccupied RIM slots – leave blank
panel
OIM 1 8
Up to four in dedicated slots and up to four* in combo slots
No need to terminate unoccupied OIM slots leave blank
panel
*the combo slots may contain any combination of OIMs and RIMs up to four modules in total
Table 5-7. Modules Required for IHU Installation
2. Referring to examples of modules shown in Figure 5-47 secure the modules to the backplane by:
Closing the ejectors (for relevant modules)
Tightening the captive screws
5.1.4.5 Grounding IHU Chassis
The grounding connection is performed via a two-hole, standard barrel grounding lug located on the IHU rear panel (see
Figure 5-7):
For use with stranded copper wire conductors
10-14 AWG
Holes - 1/4 inch
Figure 5-49. IHU Grounding Lug (IHU Chassis Rear)