Introduction; The E2 Refrigeration Controller (Rx) - Emerson E2 Installation And Operation Manual

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Introduction

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
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.
Figure 1-1
- E2 Controller
1.1 The E2 Refrigeration
Controller (RX)
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

The E2 Refrigeration Controller (RX)

®
Lonworks Networks, and
™
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.
Capabilities
Analog Combiner
Analog Import Point
Analog Sensor Control
Anti-Sweat
Case Control Circuit
CC100 Case Suction
CC100 Liquid Control
CCB
Condenser
Control Link ACC
Control Link Case Disp
Control Link RSC
CS100 Ckt Suction
CT Drive
Digital Combiner
Digital Sensor Control
Discus
E2 Alarm Panel
Energy Meter
Enhanced Suction Group
Table 1-1
- RX-100, RX-300, and RX-400 Comparison
RX- RX- RX-
100 300 400
0 128 128
0 64 64
24 64 72
8 16 64
0 48 64
0 99 99
0 99 99
0 99 99
1 1 2
16 63 63
0 99 99
0 99 99
0 99 99
0 16 16
0 128 128
24 64 72
0 63 63
7 7 7
30 30 30
4 4 4
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Introduction 1 1