Bradley Smoker PLC-5 user manual Selecting and Placing I/O, Input Output

Selecting and Placing I/O 2-3

Placing I/O Modules in a Chassis

Place I/O modules in a chassis depending on the electrical characteristics of the module. The placement is made left to right, with the left-most position being closest in the chassis to the PLC-5 controller or the I/O adapter module. The placement order is as follows:

Module placement priority:

1.block-transfer modules (all types)

2.dc input modules

3.dc output modules

4.ac input modules

5.ac output modules

Priority:

1

1

2

2

3

3

4

4

5

5

P

L

C

Block

Block

dc

dc

dc

dc

ac

ac

ac

ac

empty

/

Transfer

Transfer

input

input

output

output

input

input

output

output

A

S

B

lowV

highV

Place block-transfer modules according to these guidelines:

Place as many modules as possible for which you need fast block-transfer times in your controller-resident local I/O chassis.

Place modules in which block-transfer timing is not as critical in remote I/O chassis.

Ac output modules should always be the furthest I/O modules away from any block-transfer modules in the same chassis.

Place input and output modules according to these guidelines:

left to right

lowest voltage to highest voltage

For optimal speed using discrete I/O, use the following module-placement priority scheme:

1.controller chassis

2.extended-local I/O chassis

3.remote I/O chassis

Publication 1785-UM012D-EN-P - July 2005