ECN Functions, Features and HW
18 1553-CNH 160 0787 Uen PA2 2005-09-23
3.4 Power Supply Input Connector
The ECN has a dual power input with the purpose of achieving redundancy.
The power will be supplied by both power inputs.
If one of the power supplies is out of order for some reason the other sup-
ply will automatically take over without any disturbances.
The power supply input connector is located on the front panel of the ECN,
see
Figure 5 on page 18.
The standard power supply for the ECN is -48 VDC, which includes protec-
tion through a disposable fuse (located on the rear panel).
Figure 5 Power Supply Input Connector and Fuse
3.5 Fan Tray
The ECN contains one removable fan tray located behind a front-panel ac-
cess cover on the right side of the unit, see
Figure 6 on page 19. The fan
tray includes two fans for cooling the ECN. A front-panel LED indicates if
one or both fans have failed, in which case, the fan tray should be replaced.
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