Emerson E2 Enhanced RX Service manual

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©2016 Emerson Climate Technologies Retail Solutions, Inc. This document may be photocopied for personal use.
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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

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©2016 Emerson Climate Technologies Retail Solutions, Inc. This document may be photocopied for personal use.
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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.

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©2016 Emerson Climate Technologies Retail Solutions, Inc. This document may be photocopied for personal use.
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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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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