System overview
1.2 EST3 Installation and Service Manual
System description
EST3 is designed using modular hardware and software
components to facilitate rapid configuration, installation, and
testing. Most network components are provided as local rail
modules (LRMs) that plug into the rail chassis assemblies. Rail
chassis assemblies are available to meet most any application.
Rail modules are used for data processing, intrapanel
communication of command/control data, response data, audio
signal processing, and power distribution. Each rail module
provides an interface to support a control/display module that
can be mounted on the front of the module. Most field wiring is
terminated using removable terminal strips for easy installation
and servicing of modules.
Cabinets are available in a variety of sizes. The smallest (3-
CAB5), in addition to the central processor module and primary
power supply module, supports two rail modules and three
control/display modules. The largest, the 3-CAB21 supports as
many as 18 rail modules and 19 control/display modules.
An EST3 cabinet can be configured as a stand-alone system or as
part of a network which supports up to 64 cabinets on a
peer-to-peer Class A or B token ring network. Below is a partial
list of local rail modules that can be incorporated into a system:
• Central Processor module (CPU). One is required for each
panel. Several models of CPU are available. See the current
compatibility lists for details.
• Primary Power Supply module (3 PPS/M, 3 BPS/M, or 3
BBC/M). One power supply module is required for each
panel.
• Main LCD Display module (LCD). One LCD is required to
provide a point of control for the entire network. Additional
displays can be added to any CPU module for additional
points of control or annunciation. Several LCD models are
available. See the current compatibility lists for details.
Additional control/display modules as required by the
application:
• 3-BPS/M Booster Power Supply module
• 3-MODCOM Modem Communicator module
• 3-SAC Security Access Control module
• 3-SSDC(1) Signature Driver Controller module
• 3-AADC(1) Analog Addressable Driver Controller module
• 3-IDC8/4 Initiating Device Circuit module
• 3-OPS Off-Premises Signaling module
• 3-ZAxx Zoned Amplifier modules