Rockwell Automation Publication 871FM-UM002A-EN-P - April 2017
9
Chapter
1
Product Overview
Product Description
The Bulletin 871FM miniature metal flat pack inductive sensors are the result
of a unique collection of enhancements—electrical and mechanical—that
make these sensors the optimal solution for harsh duty applications. The
machined stainless steel housing combines an unusually thick sensing face with
one-piece construction. The result is a sensor that is exceptionally resistant to
abrasion and impervious to fluid ingress, a feature especially crucial in
applications that involve cutting fluids and chemical washdowns. The 871FM
sensors stainless steel housing with metal face provides a more rugged solution
in harsh environments.
The IO-Link interface enables consistent communication for diagnosing and
parameterizing through to the sensor level and makes the intelligence that is
already integrated in every 871FM inductive sensor fully available. These
features provide particular advantages in the service area (fault elimination,
maintenance, and device replacement), during commissioning (identification
and configuration), and during operation (continuous parameter monitoring
and online diagnosis). The 871FM sensor operates as a standard discrete sensor
on pin four (black) or communicates via IO-Link on the same pin when
connected to an IO-Link master.
Operating Modes
The sensor can operate in two modes:
•
Standard I/O (SIO) Mode:
The sensor default operation mode. The
sensor and its output act as a standard inductive sensor without IO-Link
functionality. This mode of operation is active when the sensor is
connected to a digital input device such as a PLC input module, a
distribution box, or an input terminal connection.
•
IO-Link Mode
: This mode is automatically activated when the sensor is
connected to an IO-Link enabled master device. Upon entering this
mode, the yellow status indicator on the sensor stays solid to indicate
that IO-Link communication has successfully been established with the
master. The sensor transmits parameter and diagnostic information that
can be accessed via PLC process data. No user intervention is required to
enable this functionality within the sensor.