A-B 1746-FIO4V module Rockwell SLC analog combination

SLC 500 Fast Analog  I/O Module

Install and Wire the Modules

This chapter describes procedures to install fast analog I/O modules in an SLC 500 system. The procedures include the following tasks.

• determine the module’s power requirements

• determine compatibility with other I/O modules

• configure input channels

• select the I/O rack slot

• install the module

• consider when wiring

– using system wiring guidelines

– grounding the cable

– determining cable length

• minimize electrical noise interference

• wire the module

• minimize ground loops

• label the terminal block

Select the I/O Rack Slot Two factors determine where you should locate the module in the I/O rack: 

ambient temperature and electrical noise. Consider the following conditions when selecting an I/O rack slot for the module. 

Position the module:

• in a slot away from ac or high voltage dc modules.

• away from the rack power supply if installed in a modular system.

• in the I/O rack lowest in the enclosure for a cooler ambient.

Determine the Module’s  Power Requirements 

Analog modules require power from the 5V dc and 24V dc backplane  power supplies of the SLC 500 system. 

This table shows the backplane  power requirements for fast analog I/O modules.

Use this table to compute the module’s portion of total load on the  modular system power supply.  

For more information, refer to SLC 500 Systems Selection Guide,  publication 1747-SG001.

Determine Compatibility  with Other I/O Modules 

Use the I/O Compatibility chart when using the expansion rack of a  fixed controller (1747-L20, 1747-L30, and 1747-L40). 

The chart  determines compatibility of other I/O modules with fast analog  modules. 

Compatibility is solely based on current drawn from the  backplane.  

For more information, refer to the SLC 500 Fixed Hardware Style  Installation and Operation Manual, publication 1747-6.21.