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Rockwell Automation Publication 871TM-UM002C-EN-P - October 2017
Chapter 3
871TM Long-range Sensor with IO-Link Overview
Real-time Diagnostics and Trending
• Real-time monitoring of the entire machine down to the sensor level
• Optimized preventative maintenance—identify and correct issues
before failures can occur
• Detect sensor malfunctions/failure
Sensor Health Status
• Real-time monitoring verifies that sensors are operating correctly
Device Profiles and Automatic Device Configuration
• “Golden” device configurations are stored in the IO-Link master
module
• Within minutes instead of hours, modify sensor parameters to produce
different finished goods
Descriptive Tags
• Faster programming during initial setup
• More efficient troubleshooting process data tags are named based on the
information they provide
• Easily monitor sensor data though intuitive tag names
How Does IO-Link Work?
IO-Link delivers data over the same standard field cabling used today. By
connecting an IO-Link sensor to an IO-Link master, the field-device data and
diagnostics are accessible. So, go beyond product detection on the machine—
now the health of the machine can be monitored as it runs.
Pin
Signal Remark
1
L+
24V
2
Out
Depends on sensor
3
L-
Ground
4
C/Q
Communication/
switching signal
IMPORTANT
The response time of an IO-Link system may not be fast enough for high-
speed applications. In this case, it may be possible to monitor/configure the
sensor through IO-Link on pin 4 of the sensor while connecting pin 2 (if the
sensor offers a second output) of the sensor to a standard input card.