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The E2 Refrigeration Controller Introduction • 1-1
1Introduction
The E2 controller is a microprocessor-based control
system designed to provide complete control of compres-
sor groups, condensers, refrigerated cases, and other com-
ponents related to refrigeration and building control. The
E2 is the controlling component of a three-network config-
uration (RS485 I/O, Echelon
® Lonworks™ Networks, and
Ethernet) that includes input and output communication
boards, remote communication software, and a variety of
sensors, probes, and transducers.
The E2 efficiently operates all systems that support
refrigeration (including compressor racks and condensers)
and other components not directly related to refrigeration
control, such as HVAC systems, anti-sweat heaters, and
sensor control modules.
1.1 The E2 Refrigeration
Controller
The E2 RX is available in three models: the RX-300,
RX-400, and RX-100. The E2 RX-300 is capable of con-
trolling a single refrigeration system (including one con-
denser and up to four suction groups). The E2 RX-400 is
capable of controlling two separate refrigeration systems
(including two condensers and up to four suction groups).
The RX-100 is a low-cost alternative to the RX-300 with
fewer capabilities and a monochrome display.
The E2 RX is primarily designed to control tempera-
ture and defrost in refrigerated cases using either direct
control (connected to the E2 via I/O boards or ESR8
lineup control boards) or by using CC-100 case control
boards (connected via the LonWorks Network).
Table 1-1 shows the differences between capabilities
for the RX-300 and RX-400.
Figure 1-1
- E2 Controller
Capabilities
RX-
100
RX-
300
RX-
400
Analog Combiner 0 128 128
Analog Import Point 0 64 64
Analog Sensor Control 24 64 72
Anti-Sweat 8 16 64
Case Control Circuit 0 48 64
CC100 Case Suction 0 99 99
CC100 Liquid Control 0 99 99
CCB 0 99 99
Condenser 1 1 2
Control Link ACC 16 63 63
Control Link Case Disp 0 99 99
Control Link RSC 0 99 99
CS100 Ckt Suction 0 99 99
CT Drive 0 16 16
Digital Combiner 0 128 128
Digital Sensor Control 24 64 72
Discus 0 63 63
E2 Alarm Panel 7 7 7
Energy Meter 30 30 30
Enhanced Suction Group 4 4 4
ESR8 ESR Control 0 99 99
Flexible Combiner 64 128 128
Heat/Cool Control 0 16 16
Holiday Schedule 4 64 64
Table 1-1 - RX-100, RX-300, and RX-400 Comparison