Det-Tronics EA2100CG Eagle 2000 Communication Gateway - Manual (Page 19)

OUTPUTS—
One SPDT sealed relay, rated 5 amperes resistive at 30
vdc, programmable for normally energized or normally
de-energized operation.
POWER CONSUMPTION—
60 ma nominal, 80 ma maximum at 24 vdc during nor-
mal operation with relay energized.
TEMPERATURE RANGE—
Operating: –40°F to +167°F (–40°C to +75°C)
Storage: –67°F to +170°F (–55°C to +77°C).
DIMENSIONS—
See Figure 6.
SHIPPING WEIGHT (Approximate)—
2.2 lbs. (1.0 kg).
DESCRIPTION
The Eagle relay module consists of a terminal wiring
board and an electronic module incorporating a state-
of-the-art communication chip, mounted inside an
explosion-proof aluminum enclosure.
CONDITIONS FOR RELAY ACTUATION
The events or system status conditions to which the
relay module can respond are defined in the lower eight
bits of the communication module status word. See
Table 4. When configuring the relay module, any or all
of these conditions can be selected for relay actuation.
Those conditions not selected will be ignored by the
relay module. Since the relay module performs a logical
“or” function on its associated communication modules,
the occurrence of any of the selected conditions can
generate an output.
OPERATING MODES
The relay module must be configured to operate in either
of two modes – the common alarm mode or the voting
mode. These modes determine the conditions needed
for the relay module to generate an output and also
identify the group of detection nodes on the communica-
tion loop that will be monitored by the relay module.
Common Alarm Mode
When operating in the common alarm mode, the relay
module performs an “or” function, actuating its relay
when any of the nodes within its group are in a status
condition specified for relay actuation (Table 4). In the
common alarm mode, the group of detection nodes mon-
itored by the relay module consists of a block of sequen-
tial addresses that is defined by a starting and an ending
address. These two addresses are programmed at the
time of system configuration. The relay module responds
to signals from only those communication modules with
addresses that fall within the specified range.
Voting Mode
As an alternative to the common alarm mode, the relay
module can be configured to operate in the voting
mode. In this operating mode, the relay module can
monitor up to eight communication module addresses in
its voting zone. These addresses are programmed indi-
vidually and do not need to be sequential. Only signals
from the specified addresses will be recognized. The
relay is actuated when an event selected for output actu-
ation occurs at the specified minimum number of individ-
ual nodes within the group (programmable from 1 to 8).
INPUTS
The relay module has two digital contact inputs. These
inputs can be programmed for active high or active low
operation.
OUTPUTS
The relay module is furnished with a sealed five ampere
SPDT relay. The relay is programmable for either nor-
mally energized or normally de-energized operation.
The relay can be manually forced into the on or off state
by the host device through the gateway.
When operating in the common alarm mode, the relay is
latching and can be reset by the host device when
events or system status conditions specified for relay
actuation no longer exist. When operating in the voting
mode, the relay module can be programmed for either
latching or non-latching operation.
STATUS UPDATE
The relay module sends a status message to the gate-
way at a field programmable rate between 1 and 10 sec-
onds. The status message contains the present condi-
tion of the output and fault isolation relays, the two digital
inputs, fault status, and the force relay on/off status.
Table 4—Status Conditions Capable of Actuating Relay
15 95-8424
Communication Module
Condition
Status Word Bit
1 Com 1 Fault
2 Com 2 Fault
3 Sensor Fault
4 Calibration
5 Alarm 1
6 Alarm 2
7 Digital Input 2
8 Output Relay