3 designing a remote i/o link – Rockwell Automation 57C570 AutoMax PC3000 User Manual User Manual

Page 69

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4Ć11

Addressing

Method

Guidelines

1Ćslot

D One I/O module slot = 1 group
D Each physical slot in the chassis corresponds to one

word (16 bits) in the input image table and one word (16

bits) in the output image table.

D When you use 32Ćpoint I/O modules, you must install as

a pair an input module and an output module in an

even/odd pair of adjacent I/O groups; if you use an input

module in slot 0, you must use an output module in slot

1 (or it must be empty). This configuration gives you the

maximum use of a rack's I/O image table.

D Use any mix of 8Ć and 16Ćpoint I/O modules, blockĆtranĆ

sfer, or intelligent modules in a single I/O chassis. Using

8Ćpoint modules results in fewer total I/O.

D Assign one I/O rack number to eight I/O groups.

1/2Ćslot

D One half of an I/O module slot = 1 group
D Each physical slot in the chassis corresponds to two

words (32 bits) in the input image table and two words

(32 bits) in the output image table.

D Use any mix of 8Ć, 16Ć, and 32Ćpoint I/O or blockĆtransfer

and intelligent modules. Using 8Ćpoint and 16Ćpoint I/O

modules results in fewer total I/O.

D Assign one I/O rack number to eight I/O groups.

4.3

Designing a Remote I/O Link

Use Belden 9463 (AllenĆBradley cable 1770ĆCD) cable for the

remote I/O network.
To design a remote I/O link you must:
D choose a data communication rate
D determine the cable lengths and terminating resistors you need

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