NU8976a數(shù)字量模塊,ABB用戶手冊(cè)
通用連接器下表描述了使用相同引腳的連接器MVME712M以及MVME761兼容版本的分配基板的。LED夾層接頭J114針連接器（基板上的J1）提供基板和LED夾層模塊。在基板上連接器是一個(gè)2x7頭。在LED夾層上，它是一個(gè)2x7表面安裝插座條。卸下LED夾層可以使用夾層連接器用作遠(yuǎn)程狀態(tài)和控制連接器。
NU8976a數(shù)字量模塊在此應(yīng)用中，J1可連接至用戶提供的外部電纜，以承載重置和將中止信號(hào)和LED線路連接到遠(yuǎn)離控制面板的控制面板MVME2603/2604。最大電纜長(zhǎng)度為15英尺。引腳分配如下所示：調(diào)試連接器J2190針連接器（MVME2603/2604基板上的J2）提供訪問(wèn)處理器總線（MPU總線）和一些網(wǎng)橋/內(nèi)存控制器信號(hào)。它可以用于調(diào)試目的。引腳分配為下表中列出了一個(gè)50針高密度連接器（基板上的J4）提供基板和可選外部軟盤之間的接口駕駛除了磁盤驅(qū)動(dòng)器控制信號(hào)外，還需要一組16條線路可用于驅(qū)動(dòng)外部LED陣列。管腳分配在中列出下表。PCI擴(kuò)展連接器J5MVME2603/2604具有堆疊PMC承載板的功能用于額外PCI擴(kuò)展的基板。114針接頭（J5開基板）提供MVME2603/2604和承載板。下表列出了端號(hào)分配。鍵盤和鼠標(biāo)連接器J6、J8MVME2603/2604有兩個(gè)6針圓形DIN連接器，位于鍵盤（J6）和鼠標(biāo)（J8）的前面板。引腳分配以下兩個(gè)表中列出了這些連接器。DRAM夾層連接器J7190針連接器（MVME2603/2604基板上的J7）為處理器總線（MPU總線）和RAM200 DRAM之間的接口閣樓。下表列出了端號(hào)分配。PCI夾層卡連接器四個(gè)64針連接器（MVME2603/2604上的J11/12/13/14）供電基板和可選PCI夾層卡之間的接口（PMC）。引腳分配如表4-8所示。
Common Connectors
The following tables describe connectors used with the same pin
assignments by MVME712M, as well as MVME761-compatible versions
of the base board.
LED Mezzanine Connector J1
A 14-pin connector (J1 on the base board) supplies the interface between
the base board and the LED mezzanine module. On the base board, this
connector is a 2x7 header. On the LED mezzanine, it is a 2x7 surfacemount socket strip.
Removing the LED mezzanine makes the mezzanine connector available
for service as a remote status and control connector. In this application, J1
can be connected to a user-supplied external cable to carry the Reset and
Abort signals and the LED lines to a control panel located apart from the
MVME2603/2604. Maximum cable length is 15 feet. The pin assignments
are as follows:Debug Connector J2
A 190-pin connector (J2 on the MVME2603/2604 base board) provides
access to the processor bus (MPU bus) and some bridge/memory controller
signals. It can be used for debugging purposes. The pin assignments are
listed in the following tableA 50-pin high-density connector (J4 on the base board) supplies the
interface between the base board and an optional external floppy disk
drive. In addition to the disk drive control signals, a set of 16 lines is
available to drive an external LED array. The pin assignments are listed in
the following table.PCI Expansion Connector J5
The MVME2603/2604 has provision for stacking a PMC carrier board on
the base board for additional PCI expansion. A 114-pin connector (J5 on
the base board) supplies the interface between the MVME2603/2604 and
the carrier board. The pin assignments are listed in the following table.Keyboard and Mouse Connectors J6, J8
The MVME2603/2604 has two 6-pin circular DIN connectors located on
the front panel for the keyboard (J6) and mouse (J8). The pin assignments
for those connectors are listed in the following two tables.DRAM Mezzanine Connector J7
A 190-pin connector (J7 on the MVME2603/2604 base board) supplies the
interface between the processor bus (MPU bus) and the RAM200 DRAM
mezzanine. The pin assignments are listed in the following table.PCI Mezzanine Card Connectors
Four 64-pin connectors (J11/12/13/14 on the MVME2603/2604) supply
the interface between the base board and an optional PCI mezzanine card
(PMC). The pin assignments are listed in Table 4-8.
