Micromod Micro-DCI: 53MC5000 MicroLink - Manual (Page 7)

The MicroLink COMMAND-RESPONSE sequence is called a transaction and network through-put
is gauged as Transactions per Second (TPS) which is a function of the data transfer rate measured
in bits per second. The maximum MicroLink network data transfer rate is 2 Megabits/second (2
Mbit/s); however, MicroLink networks with SUPERVISOR-PC units or PC units with the 53WS5000
product package installed, are restricted to 1 Mbit/s or less.
Typical enhancements and expansions to the Single MicroLink network are a Single Redundant
network, a Double network, and a Double Redundant network. The 53MC5000 PCS, the
53SU5000 SUPERVISOR-PC unit, and the PC unit with the 53WS5000 product package installed
are all capable of accepting a second MicroLink network to provide redundancy. If the first network
(Network A) fails, communication is automatically established on the second network (Network B).
To enable a SUPERVISOR-PC unit or a PC unit with the 53WS5000 product package installed to
communicate on a Single Redundant network, a Redundant Microlink card (p/n 686B626) must be
installed next to the MicroLink SUPERVISOR board. A Double Redundant MicroLink network re-
quires two MicroLink SUPERVISOR boards, each with its own Redundant MicroLink card installed
next to it. A 53MC5000 PCS installed on a redundant network (Single or Double), requires installa-
tion of a second Communications Option card (p/n 686B599).
Table 2-1 lists the comparative attributes of typical MicroLink networks and Figure 2-1 is a basic il-
lustration of those networks. In Figure 2-1, a PC unit with the 53WS5000 product package can be
installed in lieu of a PCS on the node or a PC unit can have both software packages installed for
SUPERVISOR-PC or 53WS5000 functionality.
Section 2. MicroLink Overview
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