Pamux User’s Guide 19
SYSTEM SETUP
OVERVIEW
This chapter explains how to construct a Pamux system with B4, B5, and B6 stations. It covers general
system configuration, installation of brain boards into I/O mounting racks, jumper configuration, cables
and connectors, power supplies, and accessory devices.
DESIGNING A SYSTEM
Pamux is a distributed I/O system linked via a 50-pin flat-ribbon cable. As long as the total cable length
does not exceed 500 feet, Pamux stations can be installed anywhere along the system. In addition, B4,
B5, and B6 stations can be daisy-chained within a single Pamux system. This provides total flexibility in
laying out your system configuration.
Each Pamux station consists of a brain board and an I/O mounting rack. Digital stations use B4 and B5
boards; analog stations use B6 boards. The B4 controls up to 32 points of digital I/O, the B5 controls up
to 16 points of digital I/O, and the B6 controls up to 16 points of analog I/O.
In addition to a brain board and mounting rack, the last station on a Pamux bus must also include a
terminator board (TERM1 or TERM2).
When laying out a system, keep in mind that the high cost of electrical wiring generally makes it best to
place the control or monitoring I/O point as close to the controlled device as possible.
Note that round parallel ribbon cable should not be used with Pamux because it may introduce cross-
talk between overlaying data lines. Use flat-ribbon cable only. (See Appendix B for cable specifications.)
Figures 2-1, 2-2, and 2-3 show three system configuration options: clustered, distributed, and distributed
clustered. Clustered systems are used to accommodate several Pamux stations in a tight location.
Distributed systems include single Pamux stations distributed over a larger area. Distributed clustered
systems involve clusters of Pamux stations distributed over several locations. As long as the total cable
length does not exceed 500 feet, the choice of system configuration is up to you.
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