Rockwell Automation 1756-XXXX ControlLogix Digital I/O Modules - Manual (Page 53)

Rockwell Automation Publication 1756-UM058G-EN-P - November 2012 53
Common Module Features Chapter 3
Software Configurable Filter Times
On to Off and Off to On filter times can be adjusted through
RSLogix 5000 software for all ControlLogix input modules. These filters
improve noise immunity within a signal. A larger filter value affects the length of
delay times for signals from these modules.
Follow these steps to configure the input filter time.
1. On the right side of the Configuration tab, choose the input filter times
from the Off
→ On and On → Off pull-down menus.
2. Click OK.
Isolated and Nonisolated Varieties of Input Modules
ControlLogix input modules provide isolated or nonisolated wiring options.
Some applications require power for the I/O circuits to originate on separate,
isolated power sources. Because these conditions require separate commons for
each channel, some input modules use individual isolation, or point-to-point
isolation so if one point faults, the others continue to operate.
Other types of isolation available with ControlLogix input modules are channel-
to-channel isolation and no isolation. Your application determines what type of
isolation is necessary and which input module to use.
IMPORTANT Input filters on the 1756-IB16IF module function differently than other digital
I/O modules. For information about input filters on the 1756-IB16IF module,
see
page 90 .