Emerson E2 Manuel D’Utilisation

Dip switch 8 controls the baud rate at which the Gate-

way communicates with the other devices on the Receiver 
Bus Network. This baud rate may only be set to either 
9600 baud (switch DOWN) or 19200 baud (switch UP). 
All Gateways and receivers on the Receiver Bus Network 
must have the same baud rate dip switch setting. It is rec-
ommended you use 9600 baud as the Receiver Bus Net-
work baud rate.

There are three I/O devices that do not have baud rates 

determined by dip switches. They are as follows:

1.

 The 8IO - this board automatically detects the 
baud rate being used by the I/O devices on the 
network, and adjusts to match their baud rate.

2.

The 8DO - this board automatically detects the 
baud rate being used by the I/O devices on the 
network, and adjusts to match their baud rate.

3.

The ARTC - this board is fixed at 9600 baud.

On all MultiFlex boards, switches 6 and 7 on S3 are 

used to set the baud rate. To communicate at 9600 baud, 
set switch #6 to the UP position and #7 to DOWN. For 
19200 baud, set switch #6 to the DOWN position and #7 
to UP.
Baud Rate for the MultiFlex ESR 

Set the baud rate on the MultiFlex ESR board by set-

ting switches 6 and 7 on the network address terminal 
(labeled S1).

To communicate at 9600 baud, set switch #6 to the UP 

position, and switch #7 to DOWN. For 19200 baud, set 
switch #6 to the DOWN position and switch #7 to UP. 
(Currently, 9600 baud is recommended).
Recommended Baud Rate

The baud rate should be set to 9600 baud in all cases.

The I/O Network connector, for all I/O boards and the 

E2, has a set of three terminating jumpers. They are the 
jumpers positioned closest to the I/O Network connector. 
The E2 has jumpers next to each of the COM ports that 
can be configured as an I/O network (COM2, COM4, and 
COM6). 

The purpose of the jumpers is to provide network ter-

mination resistance and network biasing to the two ends, 
or termination points, of the daisy chain. One device at the 
beginning and one device on the end must be terminated 
and biased by placing all three jumpers in the UP or I/O 
position. All other devices on the daisy chain must have all 

three jumpers set to the DOWN or NO position.



 Figure 6-2 shows the proper terminating jumper settings 
for the E2 and for all I/O boards.

THE TERMINATING JUMPERS MUST 
BE IN THE UP OR I/O POSITION IF AT THE 
BEGINNING OR END OF THE NETWORK.

THE TERMINATING JUMPERS MUST 
BE IN THE DOWN OR NO POSITION IF NOT AT 
THE BEGINNING OR END OF THE NETWORK.

I/O BOARD AND E2 TERMINATING JUMPERS

I/O

NO

I/O

NO

All models of E2-compatible I/O boards require 

24VAC Class 2 input power. Some boards such as the 
16AI, 8RO, 4AO, 8DO, MultiFlex ESR, and MultiFlex 16 
use a center-tapped power source. All other models, such 
as the 8IO and MultiFlex Combination I/O boards, may 
use non-center tapped power sources.