Introduction, Introducing the xm-220 module, Chapter 1 – Rockwell Automation 1440-SPD02-01RB XM-220 Dual Speed Module User Manual
Page 9: Chapter
1
Publication GMSI10-UM004B-EN-P - May 2010
Chapter
1
Introduction
This chapter provides an overview of the XM-220 Dual Speed module. It also
discusses the components of the module.
Introducing the XM-220
Module
The XM-220 Dual Speed module is a member of the Allen-Bradley™ XM
®
Series, a family of DIN rail mounted condition monitoring and protection
modules that operate both in stand-alone applications or integrate with
Programmable Logic Controllers (PLCs) and control system networks.
The XM-220 is a two channel module that accepts input from any two
tachometers of any standard type including eddy current probes, magnetic
pickups, optical tachometers, and TTL output devices. It measures speed,
rotor acceleration, and peak speed and is capable of detecting zero speed,
locked rotor, and reverse rotation conditions. It is also used as a component of
the XM Electronic Overspeed Detection system.
The XM-220 can be configured (using the configuration software) to operate
in three different modes. This controls how the sensors are used to calculate
the speed, acceleration, and peak measurements.
•
Dual Channel Mode - This is the default mode. The two sensors are
used independently to perform two separate sets of speed, acceleration,
and peak speed measurements.
•
Single Redundant Channel Mode- One of the two sensors is used
perform the speed, acceleration, and peak speed measurements. The
module automatically switches to the other (redundant) sensor when a
transducer or tachometer fault is detected on the current sensor.
•
Reverse Rotation Mode - The two sensors are used to monitor speed
and direction of a single shaft. The two sensors must be mounted out of
phase from each other so that the rotational direction can be determined
by monitoring which sensor the shaft keyway passes first. Refer
to Sensor Placement for Reverse Rotation on page 35.
For information about
See page