Emerson E2 operation manual Setting the Terminating and Biasing Jumpers, Powering the I/O Boards

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

three jumpers set to the DOWN or NO position.

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

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.

Baud Rate for the 8IO, 8DO, and ARTC

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.

Baud Rate for MultiFlex Boards

I/O BOARD AND E2 TERMINATING JUMPERS

I/O

NO

I/O

NO

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.

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.

6.1.8Setting the Terminating and Biasing Jumpers

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

Figure 6-2- I/O Network Termination Jumper Settings

6.1.9Powering the I/O Boards

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-tappedpower source. All other models, such as the 8IO and MultiFlex Combination I/O boards, may use non-center tapped power sources.

6-4 • E2 RX/BX/CX I&O Manual 026-1614 Rev 4 5-JAN-2013