
Introduction
The PMBACS is a general purpose control system that is well suited to
Home Automation and Commercial and Retail lighting and heating
control and also access control and security.
It's a distributed modular system. It's based on modules that connect
together using data cable and plug in connectors.
Many control systems consist of large (expensive) centralized control
panels. The sensors and devices being controlled are connected to
these panels. The PMBACS differs in that it consists of many smaller
control modules located throughout the building. The most common of
these is the LCP controller.
These modules are connected together by a data network. This allows
them to interact, giving the appearance of a much larger and more
complex system.
One advantages of the modular approach is a form of parallel
processing. Many modules can be busy all at the same time without
slowing each other down. This results in very good performance at a
very competitive price. Another advantage is cost proportional to
system size.
A small economical system can consist of one or two modules, a very
large system can consist of hundreds of modules. Unlike the other
systems, there is no need to purchase the expensive control panel
just to get started.
One LCP module, a power supply module and a couple of small output
modules will provide multiple dimmable lighting circuits, areas of
heating control and security zones; usually for about the cost than a
small security alarm panel.
Additional LCP modules can simply be added to provide more lighting
circuits, heating control, security zones and other functions.
Large systems or those requiring special functions will often include
a Master Controller. This can be a module that sits with the power
supply, or a slightly larger module that provides special expansion
features. The master takes over the job of coordinating network
traffic and managing the other modules.
Special function modules provide inputs and outputs for system
expansion. This is where we get into large scale access control and
logic control. See Access & Logic Control.
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