Det-Tronics Eagle Quantum Premier - EQP Marine Application System; Local Operating Network (LON); Network Extenders

2-8
95-8533
18.2
• Modular trouble and alarm configuration
• Multiple zone application with controller-to-
controller communication
• Multiple media options
IMPORTANT
When using RS-485 communications P8
(Port 1) and P10 (Port 2) wiring must be
less than 20 feet and placed into conduit.
Or, ber optic converters (see table 3-9
for performance veried units) shall be
used. Or,, the EQ2230 RSP can be used
to protect against electrical surge and
transient EMI. The ber optic converter
and RSP must be placed inside the
cabinet with the controller.
EQP Marine Application System
For information regarding EQP Marine
Application Systems, refer to Appendix D.
LOCAL OPERATING NETWORK (LON)
The LON is a fault tolerant, two wire, digital
communication network. The circuit is arranged
in a loop starting and ending at the Controller.
The circuit supports up to 246 intelligent field
devices spread over a distance of up to 10,000
meters (32,500 feet).
NOTE
All LON devices support ANSI/NFPA
72 Class X communication with the
Controller.
Network Extenders
Transmitted signals can travel a maximum
distance of 2,000 meters through LON
communication wire. At the end of this
distance, a network extender (see Figure
2-8) must be installed to rebroadcast the
communications into the next wire segment.
For every network extender added, the length
of the communications loop extends up to
2,000 meters. Due to propagation delays
around the loop, the maximum loop length is
limited to 10,000 meters.
NOTES
A network extender is required for
communication loops greater than 60
nodes.
Communication wire segment lengths
are dependant upon physical and
electrical characteristics of the cable.
Refer to the installation section for LON
cable wire information.
No more than six network extenders may
be used on the communication loop.
When a network extender is installed in
the communication loop, up to 40 eld
devices can be installed per network
segment. The network segment is the
wiring segment between two network
extenders or between a network
extender and a controller.
Modbus Slave
TCP/IP Server
Modbus Slave
TCP/IP Server
TCP/IP Client
Modbus Master
10/100M Ethernet LAN
EQP Controller EQP Controller
HMI/DCS
Figure 2-7—Ethernet TCP/IP Server/Client Relationship &
Modbus RTU Master/Slave Relationship
Figure 2-8—Eagle Quantum Premier Network Extender