Rockwell Automation 1756-LSC8XIB8I ControlLogix Low-speed Counter Module - Manual (Page 7)

Rockwell Automation Publication 1756-UM536A-EN-P - April 2012 7
Chapter
1
Module Features
About the Counter Module The counter module is an eight counter, eight input point, 24V high-speed DC
isolated, sink/source input module. The counter module has eight dedicated,
40 kHz counters. Each counter returns accumulated count, instantaneous
frequency, average frequency, instantaneous pulse width, and average pulse
width. The module provides an additional eight inputs that you can assign to
counter control functions, including Up/Down Count, Count Enable, Reset
Count, and Preset Count, or use as standard hardware inputs.
Based on onboard comparisons of count or frequency values, each counter has
two configurable On/Off windows that are capable of controlling the On/Off
behavior of outputs on a 1756-OB16IEF module. The counter module is capable
of evaluating count values and activating outputs independent of the controller
for fast response time.
Proximity Sensor
Compatibility Inputs comply with the IEC 61131-2 directive for Type 3 sensors. Compatible
products include Allen-Bradley Bulletin 871, 872, and 875 proximity sensors.
To use the counter module with non-IEC Type 3 sensors, refer to Appendix C for
alternate wiring and recommendations.
Topic Page
About the Counter Module 7
Proximity Sensor Compatibility 7
Module Features 8
Parts Illustration 10