Rockwell-automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter Instrukcja Użytkownika Pobierz pdf (Strona 57)

Publication 1769-UM001B-EN-P - October 2002

Configuring Your Compact I/O Series A DeviceNet Adapter 3-7

Using Banks of I/O

Configuration Rules for the Series A Adapter

• The Series A adapter must be the first and left-most module in

the system (the first module of Bank 1).

• The Series a adapter can communicate with up to 30 modules in

a system.

• Each bank of I/O must have its own power supply.

• A bank of I/O can have a maximum of 16 modules with a

maximum of eight on either side of the power supply,

depending upon module loading on the supply.

• A 1769 I/O power supply has limits in the amount of +5V dc and

+24V dc current it can supply to the modules in its I/O bank.

These limits depend on the catalog number (e.g. 1769-PA2) of

the supply. A bank of modules should not exceed the current

limits of the I/O bank power supply. Refer to the Compact 1769

Expansion I/O Power Supplies Installation Instructions,

publication 1769-5.14.

• The maximum amount of current each bank supports in one

direction (either side of the power supply) is: 2A @ 5V dc, 1A @

24V dc.

• If another bank of I/O is required, use a bus communication

expansion cable (e.g. 1769-CRL) to link them together. You can

have a maximum of three banks of I/O connected with up to

two communication expansion cables.

• Each module type has its own distance rating (the number of

modules from the power supply). Each module must be within

this rating for its type.

• The Series A adapter has a distance rating of four, therefore the

adapter must be within four modules of the power supply.

• The Series A adapter supports a total of:

– 180 words of input data from the I/O modules.

– 180 words of output data for the I/O modules.

– 724 words of configuration data for the I/O modules.

• An end cap/terminator must be on the last I/O bank.

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Rockwell-automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter Instrukcja Użytkownika Strona 57