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Circuit Pack Descriptions
Issue 3 June 2001
7-59
Software Download 7
The BBF9/BBF10 support software download via a local CIT or via the DCC.
Power Circuitry 7
The MXRVO circuit packs supply +5 V power and (-48 V for BBA2B) to the circuit
packs in the corresponding DS1 circuit pack groups. These two inputs are diode
ORed and the output is fused and then filtered before it is used to power the rest
of the circuit pack. A failure of the fuse or converter causes the red FAULT LED to
light.
IMA LAN Power Settings 7
Take care to avoid damaging the LEDs that protrude through the opening in the
faceplate of the IMA LAN circuit pack.
The only hardware option settings on IMA LAN circuit packs are the power
settings (located on the bottom circuit board) shown in Figure 7-1. If there are
other jumpers on the circuit pack similar to the power jumpers, they are factory
test points and should be ignored.
Refer to Figure 7-1 and Table A and set power jumpers.
Table A – IMA LAN Power Settings
Corresponding FUNCTION UNITS IMA Power Setting
MXRVOCircuitPack +5V –48V
BBG2 MXRVO X
BBG2B MXRVO X
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