OPTO 22 Optomux B1, User Manual

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SYSTEM CONFIGURATION
B1 and B2 User’s Guide
6
System Configuration
Physical Layout
The high cost of electrical wiring and the noise susceptibility of analog signals make it desirable to
place the control or monitoring point as close to the controlled device as possible. Optomux offers
design flexibility, with as few as 4 points or as many as 4,096 points in one physical location. Each
Optomux IO unit must be assigned its own unique address, 0 through 255.
Considerable installation savings and improved system performance can be realized by placing the
control point (Optomux) close to the controlled device. The serial data link between adjacent
Optomux IO units consists of two twisted pairs and a common which makes it practical to have an
Optomux located at each machine on a factory floor, at each heating or air conditioning unit in an
energy management application, or at each instrument in a data acquisition environment.
Communications
Optomux I/O units can be configured to operate in multidrop or repeat mode via jumpers located
on each Optomux protocol brain board. For more information on communications, wiring, and
system layout, please refer to the individual data sheet for Optomux protocol brain boards.
Modular Construction
Each Optomux unit is composed of two components, a brain board and a module mounting rack.
For example, the B1 connects to the rack via a 50-pin header connector. The following figure shows
a typical B1/mounting rack combination assembly.
Figure 1-1: Brain Board and Rack Assembly