Rockwell-automation 1791-XXXX Discrete I/O AC and DC Block I/O Input a Manual de usuario descargar pdf (Pagina 56)

Installing Block I/O

Chapter 3

3-37

Figure 3.26

Series

Configurations for Block I/O Using the SLC Programmable

Controller

10834I

Install terminating resistor

on last block.

To 1747SN

Scanner Module

1

2

15

16

Up to 16 blocks with

SLC5/02 or SLC5/03

If this is the last remote I/O adapter on the remote I/O link in a PLC

system, you must use a terminating resistor to terminate both ends of the

remote I/O link (scanner end and last block end). The size of the terminator

is determined by the system configuration.

Older system configurations must use a 150 ohm resistor at both ends.

With newer devices that can support it, you can use an 82 ohm termination

resistor at both ends. The 82 ohm terminators provide “extended node”

capability which allows you to have up to 32 physical devices on the

remote I/O link. (The number of logical racks capable of being addressed

by the scanner is not affected.)

ATTENTION: Devices that are operating at 230.4K baud must

have 82 ohm terminators in place for proper operation.

Extended Node Capability

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 97 98

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