Application, Features, Specifications – Det-Tronics EA2100CG Eagle 2000 Communication Gateway User Manual

Page 18

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RESPONSE TIME VERSUS SYSTEM SIZE

The Eagle 2000 is a highly versatile system that allows
up to 250 detection points to operate on a single com-
munication network.

When designing a system, it is important to realize that
increasing the number of nodes on the communication
loop results in a corresponding increase in the amount
of time required for a status change message from a
detection node to reach the host computer.

The communication system requires a finite length of
time to process each bit of information that is transferred
along the communication network. As the number of
nodes increases, so does the amount of data that is
being processed and the time required for processing
the data. As a result, there is a corresponding increase
in the total response time needed to receive the mes-
sage from a node that is responding to a status change.

NOTE

Increasing the number of detection nodes on the
communication loop affects only the time needed
for the status update message to reach the host
computer. It does not adversely affect the time
required for a detector to respond to an alarm con-
dition and generate the appropriate output.

If fast communication response time is an important cri-
teria for a large system, it is recommended that the
number of nodes on an individual loop be kept as small
as practical. Consult the factory for specific information
or for assistance in designing a system.

Section VI

EA2500RM

Relay Module

APPLICATION

The Eagle Relay Module monitors a selected group of
detection nodes on the digital communication loop. The
relay module is furnished with a sealed SPDT relay and
generates an output when the selected criteria for out-
put actuation are met.

The specific status conditions to which the relay module
will respond are selected at the time of configuration.
These can include one or more of a variety of fault,
alarm or calibration events.

FEATURES

• Monitors from 1 to 248 nodes

• Configurable for common alarm or voting function

• Up to 105 relay modules on a communication loop

• Sealed 5 ampere SPDT relay

• Field addressable

• Fault isolation

• Pass through communication circuitry on power loss

• Non-volatile memory

• Accepts two digital contact inputs

• EMI hardened

• Screw terminal connectors.

SPECIFICATIONS

INPUT VOLTAGE—

18 to 32 vdc.

INPUTS—

Two digital contact inputs, programmable for active low
or high operation.

NODE

HOST

TOTAL LOOP CAPACITY: 180 NODES, 6000 METERS

A1597

NODE

GATEWAY

NODE

NETWORK

EXTENDER

NODE

NETWORK

EXTENDER

NODE

Figure 13—Expanded System with Two Network Extenders

NODE

HOST

A1598

TOTAL LOOP CAPACITY: 60 NODES, 2000 METERS

HOST

MAIN

GATEWAY

AUXILIARY

GATEWAY

Figure 14—Eagle System with Two Gateways

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