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Networking Overview Introduction • 1-5
1.4.2 The E2 Echelon Lonworks
Network
The E2 is also compatible with a network platform
called Lonworks. This is most commonly referred to as
“the Echelon Network,” after the company who invented
the platform, the Echelon Corporation.
In general, peripherals with control functions — such
as case
controllers, rooftop HVAC controllers, and other
E2 RX and BX units — are interconnected on the Echelon
Network. These controllers do most of their own computa-
tion and system control, but they
communicate with other
E2s to provide logging, alarm control, and other functions.
In addition to these, Emerson Retail Solutions also offers
Echelon-compatible input and output boards similar to
those available for the RS485 Network.
Figure 1-3
- E2 RX Echelon Network Diagram
RXE2
E2
E2 RX & BX
ECHELON NETWORKS
MultiFlex
I/O
MultiFlex
I/O
MultiFlex
I/O
MultiFlex
I/O
CS-100
CS-100
CC-100
MultiFlex
I/O
MultiFlex
I/O
MultiFlex
I/O
MultiFlex
I/O
CC-100
CC-100
Figure 1-3 shows the E2 RX peripherals that commu-
nicate across the Echelon Network:
• CC-100 - Case
control board - controls all lights,
fans, defrost, and refrigeration for a single case. The
CC-100 controls pulse or stepper valves to provide
precise evaporator control, resulting in better tem-
perature maintenance and energy efficiency.
• ESR8 -
Evaporator stepper regulator - the analog
outputs on this board allow the E2 to control circuit
temperature in up to eight circuits using suction-
side mounted electronic evaporator pressure regula-
tors (EEPRs).
• TD3 - T
emperature display - has three inputs that
monitor case temperature, product temperature and
defrost status.
• Thir
d Party Echelon Devices - Echelon
®
LON-
MARK
®
devices communicate with E2 through its
“Open Echelon” networking feature, and require a
license key and a description file that is loaded into
the E2 that enables communication.
1.4.3 Interconnection With Other
E2s
In large installations where more than one refrigeration
system is present, or where E2s are controlling both refrig-
eration and building HVAC sys
tems in the same site, the
E2s share information with each other across either the
Echelon Network or via Ethernet.
Figure 1-4 - E2 RX/BX Network
Echelon Box-To-Box
Ethernet Box-To-Box
Switch
CAT5 CABLE
ECHELON CABLE (daisy chain)