3BSE018172R1控制器模塊，ABB使用進(jìn)展
多功能開關(guān)（可復(fù)位保險(xiǎn)絲）MVME2700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P2.3.3V DC和2.5V DC電源由車載+5V直流電。下表列出了保險(xiǎn)絲及其保護(hù)電壓。筆記1、復(fù)位時(shí)，燈測(cè)試功能點(diǎn)亮所有LED。2.因?yàn)镕US LED監(jiān)控MVME2700，它不直接指示任何單個(gè)保險(xiǎn)絲如果LED閃爍或熄滅，請(qǐng)檢查所有保險(xiǎn)絲（多開關(guān)）。
3BSE018172R1控制器模塊輸入/輸出功率MVME2700基板提供+12V DC和（在MVME761輸入/輸出中版本）–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）F2和F3。這些電壓源為串行端口驅(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直流電源通過多功能開關(guān)F1提供給
基板的鍵盤和鼠標(biāo)連接器與14針相結(jié)合LED夾層/遠(yuǎn)程重置接頭J1。上的FUS LED（DS5）當(dāng)所有三種電壓都可用時(shí)，MVME2700前面板點(diǎn)亮。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)，反過來表明多功能開關(guān)F2良好。如果以太網(wǎng)收發(fā)器無法工作，請(qǐng)檢查多功能開關(guān)F2。在MVME712M輸入/輸出模式下，MVME2700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)絲如果SCSI設(shè)備損壞，則SCSI設(shè)備可能無法正常工作或根本無法正常工作。和P2適配器板，通過電纜連接到轉(zhuǎn)換模塊，并帶有SCSI總線連接到轉(zhuǎn)換模塊，模塊上的綠色SCSI指示燈SCSI終端電源可用時(shí)亮起。如果SCSI指示燈亮起轉(zhuǎn)換模塊在SCSI總線操作期間閃爍，檢查保險(xiǎn)絲F1是否接通P2適配器板。注意，因?yàn)镾CSI總線上的任何設(shè)備都可以提供TERMPWR，并且因?yàn)镸VME2700上的FUS LED監(jiān)控在幾個(gè)電壓下，LED不會(huì)直接指示情況任何單個(gè)保險(xiǎn)絲。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，MVME2700提供SCSI終端電源通過P2適配器板上的多功能開關(guān)（可復(fù)位保險(xiǎn)絲）。揚(yáng)聲器控制MVME2700基板向14針提供揚(yáng)聲器輸出信號(hào)組合LED夾層/遠(yuǎn)程重置接頭J1。當(dāng)J1用作移除LED夾層的遠(yuǎn)程重置連接器揚(yáng)聲器輸出信號(hào)可以通過電纜連接到外部揚(yáng)聲器以獲得蜂鳴音語氣關(guān)于J1的引腳分配，請(qǐng)參閱表4-1
Polyswitches (Resettable Fuses)
The MVME2700 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 2.5V DC power is derived on-board from the
+5V DC. The following table lists the fuses with the voltages they protect.Notes
1. At reset, a lamp test function illuminates all the LEDs.
2. Because the FUS LED monitors the status of several voltages on the
MVME2700, it does not directly indicate the condition of any single
fuse. If the LED flickers or goes out, check all the fuses
(polyswitches).I/O Power
The MVME2700 base board furnishes +12V DC and (in MVME761 I/O
versions) –12V DC power to the transition module through polyswitches
(resettable fuses) F2 and F3 respectively. These voltage sources power the
serial port drivers and any LAN transceivers connected to the transition
module. Fused +5V DC power is supplied through polyswitch F1to the
base board’s keyboard and mouse connectors and to the 14-pin combined
LED-mezzanine/remote-reset connector, J1. The FUS LED (DS5) on the
MVME2700 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 F2 is good. If the Ethernet transceiver fails to operate, check
polyswitch F2.
In MVME712M I/O mode, the MVME2700 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 on the MVME2700 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 MVME2700 supplies SCSI terminator power
through a polyswitch (resettable fuse) located on the P2 adapter board.
Speaker Control
The MVME2700 base board supplies a SPEAKER_OUT signal to the 14-pin
combined LED-mezzanine/remote-reset connector, J1. When J1 is used as
a remote reset connector with the LED mezzanine removed, the
SPEAKER_OUT signal can be cabled to an external speaker to obtain a beep
tone. For the pin assignments of J1, refer to Table 4-1.
