Miranda NV5256, Руководство пользователя

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NV5256 Machine Control Router • User’s Guide 23
3. Detail
Expansion
LEDs
Five LEDs are on the front of the card. (Note that there is metal card extender in front of the card.
The LEDs are nevertheless visible.) There names and functionality are as follows:
The LEDs are listed in the order they appear at the front of the card.
Under normal operation, the ‘Power’ light is green, the ‘FPGA loaded’ light is yellow, and the
‘COM good’ light is green. The other lights are off.
Another LED — serial link error — exists in the center of the board. This LED indicates whether the
frame’s expansion link is invalid. This LED is red. It lights when the frame’s expansion cards are
absent or when the frame receives errors from the expansion card. In a stand-alone router, this LED
will be on.
Expansion
The NV5256 can be expanded to a maximum of 512 ports. To accomplish this, interconnect two
NV5256 frames. The frames share each other’s input space. The first frame receives commands
from the router control system and acts as the master to the second frame.
The interconnect is simple and uses the frame expansion connectors at the back of the frame.
Figure 3-4. Expansion Connectors and Expansion Connections
The frame expansion connectors are driven by the frame expansion cards (EM0502-00) in the
frame. A frame really requires only one expansion card; the second is recommended for redun-
dancy. If both cards and links are installed, the frame will switch from one expansion link to the
other if the current link goes bad.
Name Color Function
Alarm Red A power rail is under voltage by 10% or more.
Power Green The power rails are good.
FGPA Loaded Yellow The FPGA has loaded properly.
COM Good Green Communication with the router control card is good.
COM Bad Red Communication with the router control card is bad.
PS 1
LEFT
PRIMARY
EXPANSION
SECONDARY
EXPANSION
IN
OUT
AES
REF
OUT
IN
AES
REF
OUT
OUT
Belden
8281
NV5256, “Slave” NV5256,”Master”
Ports 1–256 Ports 257–512
Exp. In
Exp. Out
AES Ref
Primary
Exp. In
Exp. Out
AES Ref
Secondary
Pri. AES Ref In
Sec. AES Ref In
10/100BaseT
10Base2 NV9000
Exp. In
Exp. Out
AES Ref
Primary
Exp. In
Exp. Out
AES Ref
Secondary
Pri. AES Ref
Sec. AES Ref
10Base2
50 W coax