Rockwell Automation 1746-NI8 SLC 500 Analog Input Modules User Manual - Manual (Page 22)

Chapter
3
Publication 1746Ć6.8 - April 1997
Installation and Wiring
This chapter tells you how to:
•
avoid electrostatic damage
•
determine the chassis power requirement for the module
•
choose a location for the module in the SLC chassis
•
set the channels for voltage or current analog input
•
install the module
•
wire the module’s terminal block
•
wire input devices
Electrostatic dischar ge can damage semiconductor devices inside this
module if you touch backplane connector pins. Guard against
electrostatic damage by observing the following precautions.
!
ATTENTION: Electrostatic dischar ge can degrade
performance or cause permanent damage. Handle the
module as stated below.
•
Wear an approved wrist strap grounding device when handling
the module.
•
Touch a grounded object to rid yourself of electrostatic char ge
before handling the module.
•
Handle the module from the front, away from the backplane
connector. Do not touch backplane connector pins.
•
Keep the module in its static-shield bag when not in use, or
during shipment.
The 1746-NI8 module receives its power through the SLC 500
chassis backplane from the fixed or modular +5V dc/+24V dc
chassis power supply. The +5V dc backplane supply powers the
SLC circuitry, and the +24V dc backplane supply powers the module
analog circuitry . The maximum current drawn by the module is
shown in the table below.
5V dc Amps 24V dc Amps
0.200 0.100
When you are using a modular system configuration, add the values
shown in the table above to the requirements of all other modules in
the SLC chassis to prevent overloading the chassis power supply.
When using a fixed system controller, refer to the Important note
about compatibility in a 2-slot expansion chassis on page
3–2.
Electrostatic Damage
1746ĆNI8 Power Requirements