Determining The Module's Power Requirements - Allen-Bradley SLC 500 1746–FIO4I User Manual

Determining the Module's
Power Requirements
Installing and Wiring Modules
This chapter describes procedures for installing fast analog I/O modules
in a SLC 500 system. Procedures include:

determining the module's power requirements

determining compatibility with other I/O modules
configuring input channels
selecting the I/O rack slot
installing the module
considerations when wiring
– system wiring guidelines
– grounding the cable
– determining cable length
minimizing electrical noise interference
wiring the module
minimizing ground loops
labeling the terminal block
Analog modules require power from the 5V dc and 24V dc backplane
power supplies of the SLC 500 system. The following table shows the
backplane power requirements for fast analog I/O modules.
Catalog Number Current @ 5V dc
1746–FIO4I 55 mA
1746–FIO4V 55mA
Use this table to compute the module's portion of total load on the modular
system power supply. For more information, refer to:
Installation & Operation Manual for Modular Hardware Controllers,
publication 1747-6.2
Installation & Operation Manual for Fixed Hardware Controllers,
publication 1747-NI001
Chapter
2
Current @ 24V dc
150 mA
120mA
2–1