Emerson operation manual Introduction, E2 Refrigeration Controller RX

1 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® 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.

Figure 1-1- E2 Controller

1.1The 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

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 1-1shows the differences between capabilities for the RX-300 and RX-400.

Capabilities	RX-	RX-	RX-
	100	300	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

Table 1-1- RX-100, RX-300, and RX-400 Comparison

The E2 Refrigeration Controller (RX) Introduction • 1-1