Det-Tronics EA2100CG Eagle 2000 Communication Gateway - Manual (Page 17)

HUMIDITY—
0 to 95% RH at 70°C.
WIRING—
The communication network requires 22 AWG level 4
shielded twisted pair wire. Other wiring should be 18
AWG minimum.
ENCLOSURE RATINGS—
Designed to meet FM and CSA requirements for Class I,
Division 1, Groups B, C and D; and is NEMA 4 rated. It
is designed to meet CENELEC requirements for EEx d
IIC T5 hazardous locations, and is IP66 rated.
SHIPPING WEIGHT (Approximate)—
Electronic module: 1.0 lb (0.5 kg)
Aluminum enclosure: 3.0 lbs (1.4 kg).
DIMENSIONS—
See Figure 8.
DESCRIPTION
The Eagle Network Extender consists of an electronic
module mounted inside a watertight, explosion-proof
aluminum enclosure.
Network extender circuitry supports communication in
both directions. If the fault detection circuitry in a com-
munication module or DCU isolates a fault in the network,
communication can continue in the opposite direction.
The use of a network extender requires no special sys-
tem configuration at the time of installation, other than
the normal configuration of the gateway and communi-
cation modules/DCUs.
AUTOMATIC DIAGNOSTICS
Automatic fault detection circuitry performs a self-test of
the network extender’s memory upon power-up. Two
yellow LEDs, easily visible through the window on the
enclosure, are illuminated in the event that a fault is
detected. Diagnostic circuitry in the network extender
does not monitor system wiring or the functioning of
devices connected to the network extender.
ENCLOSURE
The network extender electronic module is mounted inside
an explosion-proof, watertight aluminum enclosure. A
mounting bracket is provided inside the enclosure for
securing the electronic module. The enclosure has a clear
window for easy viewing of the status indicating LEDs. A
removable cover allows access to the wiring terminals.
The enclosure is furnished with two 3/4 inch NPT con-
duit entries.
GENERAL INFORMATION
SYSTEM CAPACITY
Eagle system technology allows the main gateway to
support a communication loop consisting of up to 60
detection nodes, with up to 2000 meters of connecting
wiring. Each network extender that is added to the loop
allows it to be expanded by the same amount - up to 60
detectors with an additional 2000 meters of wiring. A sin-
gle communication loop can accommodate up to 6 net-
work extenders, with a total of no more than 250 nodes
and up to 10,000 meters of wiring (Figures 12 and 13).
NOTE
The addition of a second or third gateway to the
loop (auxiliary gateway) does not allow additional
nodes or wiring to be added to the loop. The use
of an auxiliary gateway is intended to allow addi-
tional host devices to be connected to the network
and/or to provide a backup in the event of a main
gateway failure (Figure 14). If the number of
detection nodes or the wiring distance of the loop
exceeds the limits of the main gateway, one or
more network extenders will be required.
TEMPERATURE LIMITATIONS
Exposure to extreme operating temperatures reduces
the maximum number of nodes allowed on the commu-
nication network. If operating temperatures are in the
+32°F to +158°F range (0°C to +70°C), the gateway can
support up to 60 detectors in a 2000 meter wiring loop.
Each network extender allows expansion of the network
by an additional 60 detectors and an additional 2000
meters of wiring (up to 250 nodes and 10,000 meters of
wiring for the total loop).
When operating between +32°F and –40°F (0°C to
–40°C) or between +158°F and +167°F (+70°C to
+75°C), the number of additional nodes for each net-
work extender is reduced from 60 to 40 nodes. An addi-
tional 2000 meters of wiring can still be accommodated.
The maximum loop wiring distance (10,000 meters) as
well as the maximum number of nodes allowed on the
total communication loop (250) does not decrease, how-
ever, additional network extenders will be required.
13 95-8424
NODE NODE NODE NODE NODE
HOST
GATEWAY
A1596
TOTAL LOOP CAPACITY: 60 NODES, 2000 METERS
Figure 12—Basic Eagle System with One Gateway