HIEE320639R0001工控卡件，ABB中文使用說明
多功能開關(guān)（可復(fù)位保險(xiǎn)絲）MVME2603/2604基板使用帶保險(xiǎn)絲的+5V DC、+12V DC和–來自VMEbus背板的12V直流電源，通過連接器P1和P2.3 V DC和核心處理器電壓電源由車載+5Vdc。下表列出了保險(xiǎn)絲及其電壓保護(hù)輸入/輸出功率
MVME2603/2604基板提供+12V DC和（在MVME761中輸入/輸出模式）–通過多功能開關(guān)向過渡模塊提供12V直流電源（可復(fù)位保險(xiǎn)絲）R34和R28。
HIEE320639R0001工控卡件這些電壓源提供電源串行端口驅(qū)動(dòng)程序和連接到轉(zhuǎn)換的任何LAN收發(fā)器單元保險(xiǎn)絲+5V直流電源提供給基板的鍵盤和鼠標(biāo)連接器通過多路開關(guān)R30和14針組合LED夾層/遠(yuǎn)程重置接頭J1。上的FUS LED（DS5）MVME2603/2604前面板在所有三個(gè)電壓均為可獲得的在MVME712M輸入/輸出模式下，MVME712M上的黃色DS1 LED也發(fā)出+12V直流LAN電源可用性的信號(hào)，反過來表明多路開關(guān)R34良好。如果以太網(wǎng)收發(fā)器無法工作，請(qǐng)檢查多路開關(guān)R34。
在MVME712M輸入/輸出模式下，MVME2603/2604提供SCSI終端通過P2適配器板上的1A保險(xiǎn)絲（F1）供電。如果保險(xiǎn)絲熔斷，SCSI設(shè)備可能會(huì)工作不穩(wěn)定或無法正常工作全部的P2適配器板連接至轉(zhuǎn)換模塊，并帶有SCSI總線連接到轉(zhuǎn)換模塊，當(dāng)SCSI終端電源可用時(shí)，模塊上的綠色SCSI指示燈點(diǎn)亮。如果SCSISCSI總線操作期間，轉(zhuǎn)換模塊上的LED閃爍，請(qǐng)檢查P2適配器板上的保險(xiǎn)絲F1。注意，因?yàn)镾CSI總線上的任何設(shè)備都可以提供TERMPWR，并且由于FUS LED監(jiān)控多個(gè)電壓的狀態(tài)，因此LED不直接指示任何單個(gè)保險(xiǎn)絲的狀況。如果LED閃爍或熄滅，請(qǐng)檢查所有保險(xiǎn)絲（多開關(guān)）。在MVME761輸入/輸出模式下，MVME2603/2604提供SCSI終端通過P2適配器上的多開關(guān)（可復(fù)位保險(xiǎn)絲）供電板
Polyswitches (Resettable Fuses)
The MVME2603/2604 base board draws fused +5V DC, +12V DC, and
–12V DC power from the VMEbus backplane through connectors P1 and
P2. The 3.3V DC and the core processor voltage power is supplied by the
on-board +5Vdc. The following table lists the fuses with the voltages they
protect.I/O Power
The MVME2603/2604 base board furnishes +12V DC and (in MVME761
I/O mode) –12V DC 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 +5V DC power is supplied to the base board’s 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 yellow DS1 LED on the MVME712M also
signals the availability of +12V DC LAN power, indicating in turn that
polyswitch R34 is good. If the Ethernet transceiver fails to operate, check
polyswitch R34.
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 TERMPWR, and
because the FUS LED monitors the status of several voltages, the
LED does not directly indicate the condition of any single fuse.
If the 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.
