
Hardware installation: Application Module (SNN/SNN-E) 3-23
Meridian MAX
Installation Guide
Product release 8
Input/output port assignments
There are five versions of the SNN/SNN-E hardware platform based on the
number of MVME332XTS/XT cards configured on the system. An
SNN/SNN-E system can be configured with anywhere from one to five
MVME332XTS/XT cards.
Note: Card 1, Conn 1 on the generic I/O panel connects to the system
console.
Each MVME332XTS/XT, or I/O card, has a maximum of three ports that
can be connected to multiport cables as seen in the “VME multiport cable”
subsection. Each multiport cable has three RS-232 serial port connectors
labeled A, B, and C. The ports in the multiport cable can be connected to
peripherals or a limited choice of other devices, except where noted below.
• Cable A of the multiport cable connected to Card 2, Conn 1 must be
connected to the Meridian 1 for use with the High-Speed Link.
• Cable C of the multiport cable connected to Conn 3C of each card
cannot be used, and should not be connected to any type of device.
This is caused because each I/O card has only eight serial ports while
the three multiport cables provide nine port connectors.
• If your system is equipped with the Configuration Control feature, you
must use one of the cables to connect to the Meridian 1.
• If your system has NAC connectivity, you require a port for the
Network Link. Bear in mind that the Network Link can only be
assigned to a single port and reduces the number of printers or
supervisor workstations by one.
• At least one supervisor workstation and one printer must be connected
to any I/O card through the multiport cable.
Aside from these restrictions, you can attach the remainder of the cables to
supervisor workstations, printers, or modems.
Note: The Configuration Control feature uses a Load Management
Link that is also referred to as a Configuration Control Link.
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