System Considerations
1-52
1
MVME2603/2604 VMEmodule
The MVME2603/2604 VMEmodule fur12Vdc and (in
MVME761 I/O mode) Ð12Vdc power to the transition module
through polyswitches (resettable fuses) R34 and R28 respectively.
These voltage sources power the serial port drivers and any LAN
transceivers connected to the transition module. Fused +5Vdc
power is supplied to the base boardÕs keyboard and mouse
connectors through polyswitch R30 and to the 14-pin combined
LED-mezzanine/remote-reset connector, J1. The
FUS
LED (DS5) on
the MVME2603/2604 front panel illuminates when all three
voltages are available.
In MVME712M I/O mode, the MVME2603/2604 supplies SCSI
terminator power through a 1A fuse (F1) located on the P2 adapter
board. If the fuse is blown, the SCSI device(s) may function
erratically or not at all. With the P2 adapter board cabled to a
transition module and with an SCSI bus connected to the transition
module, the green
SCSI
LED on the module illuminates when SCSI
terminator power is available. If the
SCSI
LED on the transition
module flickers during SCSI bus operation, check fuse F1 on the P2
adapter board.
Note
Because any device on the SCSI bus can provide the
TERMPWR
signal, and because the MVME2603/2604
FUS
LED monitors the status of several voltages, the
LED does not directly indicate the condition of any
single fuse. If the
FUS
LED flickers or goes out, check
all the fuses (polyswitches).
In MVME761 I/O mode, the MVME2603/2604 supplies SCSI
terminator power through a polyswitch (resettable fuse) located on
the P2 adapter board.
Содержание MVME2603-1121A
Страница 1: ...MVME2600 Series Single Board Computer Installation and Use V2600A IH2 ...
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Страница 12: ...xii ...
Страница 14: ...xiv ...
Страница 70: ...System Considerations 1 54 1 ...
Страница 86: ...Programming Considerations 2 16 2 ...
Страница 112: ...Block Diagram 3 26 3 ...
Страница 174: ...Related Specifications A 10 A ...
Страница 178: ...FCC Compliance B 4 B ...
Страница 188: ...Proper Grounding C 10 C ...
Страница 206: ...Glossary GL 14 G L O S S A R Y ...