Det-Tronics Eagle Quantum 95-8470-05, Инструкция по эксплуатации

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II–1 95-8470
Section II
Local Control Unit (LCU) and
Power Supplies
OVERVIEW
The Local Control Unit (LCU) is the “heart” of the Eagle
Quantum system. External host devices such as PLC’s
or DCS’s interface through the LCU, the fire detection
and releasing logic resides in the LCU, control of the
releasing, signaling, and annunciation outputs are
handled by the LCU, and the Local Operating
Network/Signaling Line Circuit (LON/SLC), through
which all field devices communicate, starts and ends its
loop at the LCU. Physically, the LCU consists of a three
slot rack style enclosure that houses the Communication
Gateway, Logic Controller, and Isolation Module. These
three modules plug into the backplane and are secured
with thumb screws. All external wiring is routed through
conduit entries at the bottom and sides of the unit. The
wiring terminals are protected by a removable cover.
The LCU can be installed in Class I, Division 2
hazardous locations. Refer to Appendix A (FMRC) and
Appendix B (CSA) for details.
LOGIC CONTROLLER
The Eagle Quantum Logic Controller uses seven
microprocessors and parallel processing techniques to
execute the logic used for fire suppression. Its wealth
of logical operators allow for the easy development of
nearly any imaginable type of cross-zone monitoring,
voting, and timed operations that might be needed in a
fire suppression system. The Logic Controller supports
ANSI/NFPA 72 Class A, Style 7 communication with field
devices.
COMMUNICATION GATEWAY
The Eagle Quantum Communication Gateway
communicates through two serial links for configuration
and monitoring. This allows for device configuration
using a comprehensive set of Det-Tronics authored
software tools. The monitoring is provided to the
Operator Interface Station(s) (OIS) through Modbus or
Allen-Bradley compatible protocols. The gateway also
provides four programmable relays that can be used to
annunciate conditions being monitored by the devices
on the LON/SLC.
ISOLATION MODULE
The Isolation Module protects the integrity of the
LON/SLC wiring by isolating shorts and monitoring for
ground faults. It also provides electrical isolation for the
two serial communication ports between the gateway
and host devices.
OPTIONAL LCU VERSIONS
An optional EQ2101LCU is available with provisions for
two 24 vdc power inputs. Two reliable and independent
24 vdc supplies, in accordance with ANSI/NFPA 72
section 1-5.2, must be supplied. If either of the supplies
is missing or a wiring problem occurs, a trouble
condition will be annunciated.
Logic controllers can be added to the communication
network to segment it into logical groups. Up to four
logic controllers can be used on each network.
Auxiliary gateways can be added to provide additional
relays or serial port connections to PLCs or DCSs. Up to
three auxiliary gateways can be added to the Quantum
network. Gateways located outside the LCU can be
turned off without disrupting LON/SLC communication
with the LCU.
EQ2100CG COMMUNICATION
GATEWAY
FEATURES
• Utilizes Modbus or Allen Bradley protocols
• Transformer isolation of network ports
• Four programmable relay outputs
• Three digit display and bar graph
• LEDs indicate relay status
• EMI/RFI hardened
DESCRIPTION
The Eagle Quantum Communication Gateway is used in
conjunction with Det-Tronics software to configure the
system as well as to provide information on an ongoing
basis to external systems such as PLCs and DCSs. It
also provides local display and four programmable
relay outputs. In addition, the gateway provides a
heartbeat signal used to test for LON/SLC integrity, to
provide time and date information to field devices, and
to monitor for the continued presence of all configured
field devices.
The gateway receives and stores the current status and
process variable information from all devices on the
“Local Operating Network/Signaling Line Circuit”
(LON/SLC) communication loop. It services all valid
requests by Modbus RTU masters and/or Allen-Bradley
DF1 masters that are received through its two host
interface serial ports. When acting as a Modbus RTU
master, the gateway will automatically transfer key
process variable and status information to a default or
user selected Modbus RTU slave address and register
offset.