Emerson E2 Enhanced RX Service-Handbuch

Document Part # 026-4157 Rev 0 19-FEB-2016 Page 1 of 4

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Overview

This technical bulletin describes E2E retrofitting of supermarkets with existing REFLECS controllers.

STEP 1: Preparing for Retrofit

When replacing a REFLECS unit with an E2E, there are several major differences that must be taken into

account.

1. All REFLECS units are powered by 110/220VAC line voltage. E2E controllers are powered by 24VAC

non center-tapped transformers. Refer to the E2E User’s Manual (P/N 026-1614 Rev 5 or later) for more

information on powering the E2E controller.

2. REFLECS units use an RS485 (COM B) network to connect to a 485 Alarm Panel. E2E does not support

the 485 Alarm Panel.

3. REFLECS units use an RS232 (COM C) host network to connect all units to a modem for alarm dial-out.

E2Es may use either Echelon or Ethernet for box-to-box communication. The existing host network

wiring may not be used for E2E box-to-box communication - you will either have to rewire using

approved Echelon network wire, or wire CAT 5 cable to an approved network router or switch. Refer

to the E2E User’s Guide for more information on box-to-box wiring.

4. COM A and COM D networks (the RS485 I/O networks) use the same wire and polarity for both the

REFLECS and E2E controllers. No rewiring of the I/O network will be necessary; just unplug the COM A

and/or COM D connectors, and plug them into the I/O port(s) on the E2E PIB (see “Transferring the

COM A and COM D Networks” below).

STEP 2: Transferring the COM A and COM D Networks

The COM A and COM D I/O networks on the RMCC/BEC/BCU are where connections to all I/O devices, such

as 16AIs and 8ROs are made. The two networks are interchangeable, each one capable of connecting up to

31 devices.

E2 Enhanced RX and BX Controllers and

RMCC/BEC/BCU Retrofitting

Technical Bulletin

Document Part # 026-4157 Rev 0 19-FEB-2016 Page 2 of 4

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The E2E’s standard I/O port (COM2, located on the E2E Power Interface Board, or PIB) also has two

connectors (Figure 1). Unplug the connectors from the COM A and COM D plugs, and plug them into the

COM2 plugs on the E2E.

STEP 3: E2E Termination Jumper Settings

The network termination jumpers, directly above the two COM2 plugs on the PIB, will need to be set to the

same positions as the COM A and COM D termination jumpers on the RMCC/BEC/BCU. The rules for

termination on E2E I/O networks are the same as the rules for RMCC/BEC/BCU I/O networks. Set the three

jumpers to the middle I/O (terminated) position if the port is at the end of a network segment or the hub of

a star configuration, and down NO (unterminated) if the port is in the middle of a segment.

There is one set of RS485 jumpers for each RS485 port (COM2A-2B; COM6; and COM4A-B). Jumpers J8-J10

are located directly above the COM2A connector port, and jumpers J11-J13 are located directly above the

COM2B port. The RS485 termination jumpers (J8-J22) are used to terminate the devices at the beginning

and end of an RS485 Network. If the E2 is the beginning of all RS485 I/O or MODBUS Networks, all three of

these jumpers should be set to the up position. For MODBUS, the jumpers should all be in the top-most

position (MOD). For I/O Net, the jumpers should be in the middle position (I/O). For no termination, set the

jumpers to the down position (NO).

Refer to the E2E User’s Manual (P/N 026-1614 Rev 5 or later) for expanded communication setup

information.

Document Part # 026-4157 Rev 0 19-FEB-2016 Page 3 of 4

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STEP 4: E2E Baud Rate Settings

Because the COM A and COM D networks of an RMCC/BEC/BCU must communicate at the same baud rate,

all I/O boards connected to the RMCC/BEC/BCU were also set to communicate at 19200 baud. Because the

default E2E baud rate for I/O networks is 9600 baud, you will need to change the COM2 baud rate setting.

This must be done in the C3: Serial tab of the E2E’s General Controller Info screens.

1. Log into the E2 with Level 4 password access.

2. Press  to access the General Controller Info screen.

3. Press +(or two times) to access the C3: Serial tab (Figure 2).

You will need to set two parameters in the C3: Serial tab.

Figure 1 - COM2 Port Location, E2E (Right Side Interior)

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The contents of this publication are presented for informational purposes only and they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or

applicability. Emerson Climate Technologies Retail Solutions, Inc. and/or its affiliates (collectively “Emerson”), reserves the right to modify the designs or specifications of such products at any time without notice. Emerson does

not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any product remains solely with the purchaser and end-user.

Document Part # 026-4157 Rev 0 19-FEB-2016 Page 4 of 4

1. In the COM2 Connection field, if the value displayed is something other than IO Net, set this parame-

ter to IO Net.

2. In the COM2 Baud field, set the value to 19.2 Kbaud.

Figure 2 - E2E Serial Configuration Screen - Baud Rate

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