Allen-Bradley Entek XM-123 User manual

XM-123
Aeroderivative
Module
Firmware Revision 4
Users Guide

Important User Information
Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application, Installation and
Maintenance of Solid State Controls (Publication SGI-1.1 available from your local
Rockwell Automation sales office or online at http://www.ab.com/manuals/gi)
describes some important differences between solid state equipment and hard-wired
electromechanical devices. Because of this difference, and also because of the wide
variety of uses for solid state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of this equipment is
acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or
consequential damages resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes.
Because of the many variables and requirements associated with any particular
installation, Rockwell Automation, Inc. cannot assume responsibility or liability for
actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of
information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written
permission of Rockwell Automation, Inc. is prohibited.
Throughout this manual we use notes to make you aware of safety considerations.
XM is a registered trademark of Entek IRD International Corporation, a Rockwell Automation company.
DeviceNet is a trademark of the Open DeviceNet Vendor Association (ODVA).
Microsoft and Windows are registered trademarks of the Microsoft Corporation.
All other trademarks are the property of their respective holders and are hereby acknowledged.
WARNING Identifies information about practices or circumstances that can
cause an explosion in a hazardous environment, which may lead
to personal injury or death, property damage, or economic loss.
IMPORTANT Identifies information that is critical for successful application
and understanding of the product.
ATTENTION Identifies information about practices or circumstances that can
lead to personal injury or death, property damage, or economic
loss. Attentions help you:
•identify a hazard
•avoid a hazard
•recognize the consequence
SHOCK HAZARD Labels may be located on or inside the drive to alert people that
dangerous voltage may be present.
BURN HAZARD Labels may be located on or inside the drive to alert people that
surfaces may be dangerous temperatures.

European Communities (EC)
Directive Compliance
If this product has the CE mark it is approved for installation within the European
Union and EEA regions. It has been designed and tested to meet the following
directives.
EMC Directive
This product is tested to meet the Council Directive 89/336/EEC Electromagnetic
Compatibility (EMC) by applying the following standards, in whole or in part,
documented in a technical construction file:
•EN 61000-6-4 EMC — Generic Standards, Part 6-4 — Emission Standard for
Industrial Environments (Class A)
•EN 61000-6-2 EMC — Generic Standards, Part 6-2 — Immunity Standard for
Industrial Environment
•EN 61326-6-2 Electromagnetic Equipment for Measurement, Control, and
Laboratory Use — Industrial EMC Requirements
This product is intended for use in an industrial environment.
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low Voltage by applying
the safety requirements of EN 61131-2 Programmable Controllers, Part 2 —
Equipment Requirements and Tests.

vPublication ENMON-UM123A-EN-P - October 2004
Table of Contents
Chapter 1
Introduction
Introducing the XM-123 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
XM-123 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Using this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Organization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2
Installing the XM-123
Aeroderivative Module
XM Installation Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Grounding Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting the Terminal Base Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Interconnecting Terminal Base Units . . . . . . . . . . . . . . . . . . . . . . . 13
Connecting Wiring for Your Module . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Terminal Block Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Connecting the Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Connecting the Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Connecting the Tachometer Signal. . . . . . . . . . . . . . . . . . . . . . . . . 21
Connecting the Buffered Outputs . . . . . . . . . . . . . . . . . . . . . . . . . 22
Connecting the Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Connecting the Remote Relay Reset Signal . . . . . . . . . . . . . . . . . . 33
Connecting the Setpoint Multiplication Switch . . . . . . . . . . . . . . . 34
Connecting the 4-20mA Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Serial Port Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
DeviceNet Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Mounting the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Module Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Basic Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Powering Up the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Manually Resetting Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Chapter 3
Configuration Parameters
Channel Transducer Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Channel Signal Processing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . 49
Measurement Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Overall Measurement Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Aeroderivative Measurement Parameter. . . . . . . . . . . . . . . . . . . . . 51
Tracking Measurement Parameters. . . . . . . . . . . . . . . . . . . . . . . . . 52
Bandpass Measurement Parameters . . . . . . . . . . . . . . . . . . . . . . . . 53
Speed Measurement Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

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Table of Contents vi
Tachometer Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Tachometer Transducer Parameters . . . . . . . . . . . . . . . . . . . . . . . . 54
Tachometer Signal Processing Parameters . . . . . . . . . . . . . . . . . . . 55
Alarm Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Relay Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
4-20mA Output Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Triggered Trend Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
SU/CD Trend Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
I/O Data Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Data Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Monitor Data Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Alarm and Relay Status Parameters . . . . . . . . . . . . . . . . . . . . . . . . 74
Device Mode Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Appendix A
Specifications
Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Appendix B
DeviceNet Information
Electronic Data Sheets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Changing Operation Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Transition to Program Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Transition to Run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
XM Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Invalid Configuration Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
XM-123 I/O Message Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Poll Message Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
COS Message Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Bit-Strobe Message Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
ADR for XM Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Appendix C
DeviceNet Objects
Identity Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
DeviceNet Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Assembly Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Connection Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Discrete Input Point Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Parameter Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Acknowledge Handler Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Alarm Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Band Measurement Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Channel Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Device Mode Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Overall Measurement Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Relay Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Speed Measurement Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

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Tachometer Channel Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Transducer Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Vector Measurement Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
4-20mA Output Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

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Table of Contents viii

1Publication ENMON-UM123A-EN-P - October 2004
Chapter 1
Introduction
This chapter provides an overview of the XM-123 Aeroderivative module. It
also discusses the components of the module and Customer Support.
Introducing the XM-123
Module
The XM-123 Aeroderivative module is a member of the Entek 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-123 is a 2-channel monitor designed specifically for monitoring
aeroderivative gas turbine engines, such as the General Electric LM2500
engine. The module can be configured, per channel, to perform either tracking
filter or bandpass filter while it continuously measures each channel’s
broad-band overall level.
The module can power and accept input from standard eddy current probe
systems and Integrated Electronics Piezo Electric (IEPE) accelerometers. The
XM-123 can also accept signals from most standard voltage output
measurement devices such as a velocity or pressure transducer. In addition to
vibration inputs, the XM-123 accepts one tachometer input to provide speed
measurements and order tracking functions.
The XM-123 also includes a single on-board relay (expandable to five), two
4-20mA outputs, and a buffered output for each input. The module can collect
data under steady-state and startup/coast-down conditions, and monitor up to
12 alarms making the module a complete monitoring system.
The XM-123 can operate stand-alone, or it can be deployed on a standard or
dedicated DeviceNet network where it can provide real-time data and status
information to other XM modules, PLCs, distributed control systems (DCS),
and Condition Monitoring Systems.
For information about See page
Introducing the XM-123 Module 1
XM-123 Components 2
Using this Manual 3
Customer Support 4

Publication ENMON-UM123A-EN-P - October 2004
2Introduction
The module can be configured remotely via the DeviceNet network, or locally
using a serial connection to a PC or laptop. Refer to Chapter 3 for a list of the
configuration parameters.
XM-123 Components
The XM-123 module consists of a terminal base and an instrument module.
The XM-123 Aeroderivative module and the XM-940 Dynamic Measurement
Terminal Base are shown below.
Figure 1.1 XM-123 Module Components
•XM-940 Dynamic Measurement Module Terminal Base - A DIN rail
mounted base unit that provides terminations for all field wiring
required by XM dynamic measurement modules, including the XM-123.
•XM-123 Aeroderivative Module - The module mounts on the XM-940
terminal base via a keyswitch and a 96-pin connector. The module
contains the measurement electronics, processor, relay, and serial
interface port for local configuration.
AERODERIVATIVE1440-VAD02-01RA
XM-940 Dynamic Measurement Module
Terminal Base Unit
Entek Cat. No. 1440-TB-A
XM-123 Aeroderivative Module
Entek Cat. No. 1440-VAD02-01RA
IMPORTANT The XM-441 Expansion Relay module may be connected
to the XM-123 module via the XM-940 terminal base.
When connected to the module, the Expansion Relay
module simply "expands" the capability of the XM-123 by
adding four additional epoxy-sealed relays. The XM-123
controls the Expansion Relay module by extending to it the
same logic and functional controls as the on-board relay.

Publication ENMON-UM123A-EN-P - October 2004
Introduction 3
Using this Manual
This manual introduces you to the XM-123 Aeroderivative module. It is
intended for anyone who installs, configures, or uses the XM-123
Aeroderivative module.
Organization
To help you navigate through this manual, it is organized in chapters based on
these tasks and topics.
Chapter 1 “Introduction” contains an overview of this manual and using
Rockwell Automation Integrated Condition Monitoring Technical Support
services.
Chapter 2 “Installing the XM-123 Aeroderivative Module” describes how to
install, wire, and use the XM-123 module.
Chapter 3 “Configuration Parameters” provides a complete listing and
description of the XM-123 parameters. The parameters can be viewed and
edited using the XM Serial Configuration Utility software and a personal
computer.
Appendix A “Specifications” lists the technical specifications for the XM-123
module.
Appendix B “DeviceNet Information” provides information to help you
configure the XM-123 over a DeviceNet network.
Appendix C "DeviceNet Objects" provides information on the DeviceNet
objects supported by the XM-123 module.
For definitions of terms used in this Guide, see the Glossary at the end of the
Guide.
Document Conventions
There are several document conventions used in this manual, including the
following:
The XM-123 module is referred to as XM-123, device, or module throughout
this manual.
TIP A tip indicates additional information which may be
helpful.

Publication ENMON-UM123A-EN-P - October 2004
4Introduction
Customer Support
If you are under warranty or have an active ESAFE Agreement, Rockwell
Automation Integrated Condition Monitoring Technical Support provides a
variety of customer support services for Entek products. In the United States
you can reach the Technical Support Hotline by dialing 1-800-368-3547
Monday through Friday 8:00 a.m.–7:00 p.m. eastern time. You can send a fax
detailing your questions or comments 24 hours a day by dialing [phone].
Please address the fax to the Technical Support department. You can also
reach Technical Support from your computer.
•Send questions or comments to raenteksuppor[email protected].
•Visit our web site at http://support.rockwellautomation.com/entek/.
For support outside of the United States, please contact your local Rockwell
Automation office. You can find worldwide contact information at
http://www.rockwellautomation.com. If your local support representative is
not available, please contact the U.S. Technical Support department.
EXAMPLE This convention presents an example.

5Publication ENMON-UM123A-EN-P - October 2004
Chapter 2
Installing the XM-123 Aeroderivative Module
This chapter discusses how to install and wire the XM-123 Aeroderivative
module. It also describes the module indicators and the basic operation of the
module.
For information about See page
XM Installation Requirements 6
Mounting the Terminal Base Unit 11
Connecting Wiring for Your Module 14
Mounting the Module 39
Module Indicators 40
Basic Operations 43
ATTENTION Environment and Enclosure
This equipment is intended for use in a Pollution Degree 2
Industrial environment, in overvoltage Category II applications
(as defined in IED publication 60664–1), at altitudes up to 2000
meters without derating.
This equipment is supplied as “open type” equipment. It must be
mounted within an enclosure that is suitably designed for those
specific environmental conditions that will be present, and
appropriately designed to prevent personal injury resulting from
accessibility to live parts. The interior of the enclosure must be
accessible only by the use of a tool. Subsequent sections of this
publication may contain additional information regarding specific
enclosure type ratings that are required to comply with certain
product safety certifications.
See NEMA Standards publication 250 and IEC publication
60529, as applicable, for explanations of the degrees of
protection provided by different types of enclosures.

Publication ENMON-UM123A-EN-P - October 2004
6Installing the XM-123 Aeroderivative Module
XM Installation
Requirements
This section describes wire, power and grounding requirements for an XM
system.
Wiring Requirements
Use solid or stranded wire. All wiring should meet the following specifications:
•12 to 28 AWG
•Recommended strip length 8 millimeters (0.31 inches)
•Minimum insulation rating of 300V
Power Requirements
Before installing your module, calculate the power requirements of all modules
in each chassis. The total current draw through the side connector cannot
exceed 3A. Refer to the specifications for the specific modules for power
requirements.
Figure 2.1 is an illustration of wiring modules using separate power
connections.
ATTENTION See the XM Documentation and Configuration Utility CD
for Hazardous Locations installation drawings. The XM
Documentation and Configuration Utility CD is packaged
with the XM modules.
ATTENTION A separate power connection is necessary if the total
current draw of the interconnecting modules is greater than
3A.

Publication ENMON-UM123A-EN-P - October 2004
Installing the XM-123 Aeroderivative Module 7
Figure 2.1 XM Modules with Separate Power Connections
Grounding Requirements
Use these grounding requirements to ensure safe electrical operating
circumstances, and to help avoid potential electromagnetic interference (emi)
and ground noise that can cause unfavorable operating conditions for your
XM system.
DIN Rail Ground
The DIN rail must be grounded. It can be connected to chassis or earth
ground using either the DIN Rail Grounding Block (Figure 2.2) or DIN Rail
mounting bolts (Figure 2.3). If the DIN Rail is coated with a non-conductive
material (anodized, painted, etc.), scrape the material around the mounting
hole.
EXPANSION RELAY 1440-REX00-04RD
EXPANSION RELAY 1440-REX00-04RD EXPANSION RELAY 1440-REX00-04RD
EXPANSION RELAY 1440-REX00-04RD
Power
Supply
DYNAMIC MEASUREMENT 1440-VST02-01RA DYNAMIC MEASUREMENT 1440-VST02-01RA
POSITION 1440-TSP02-01RB MASTER RELAY 1440-RMA00-04RC

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8Installing the XM-123 Aeroderivative Module
Figure 2.2 DIN Rail Grounding Block
Figure 2.3 DIN Rail Mounting Bolts
XM System Ground
The XM system must be connected to chassis or earth ground at a single
point. This means that all grounds are connected or tied down at one location
to prevent ground loops between equipment. It is highly recommended that
the single point be at an XM module (24V Common terminal), as shown in the
Figure 2.4, or at the 24V power supply. Use 14 AWG wire.
IMPORTANT The 24V Common and Signal Common terminals are
internally connected. They are isolated from Chassis GND
unless they are connected to Chassis GND as described in
this section.

Publication ENMON-UM123A-EN-P - October 2004
Installing the XM-123 Aeroderivative Module 9
Figure 2.4 Grounded XM System
For multiple XM systems that share the same power supply, only one chassis
or earth ground connection is needed, as is shown in Figure 2.5.
Figure 2.5 Grounded XM Systems Sharing Power Supply
EXPANSION RELAY 1440-REX00-04RD EXPANSION RELAY 1440-REX00-04RD DYNAMIC MEASUREMENT 1440-VST02-01RA DYNAMIC MEASUREMENT 1440-VST02-01RA
Power
Supply
The earth ground connection is made at only one of the XM modules.
Not at each module.
EXPANSION RELAY 1440-REX00-04RD
EXPANSION RELAY 1440-REX00-04RD EXPANSION RELAY 1440-REX00-04RD
EXPANSION RELAY 1440-REX00-04RD
Power
Supply
DYNAMIC MEASUREMENT 1440-VST02-01RA DYNAMIC MEASUREMENT 1440-VST02-01RA
POSITION 1440-TSP02-01RB MASTER RELAY 1440-RMA00-04RC

Publication ENMON-UM123A-EN-P - October 2004
10 Installing the XM-123 Aeroderivative Module
For multiple XM systems that do not share the same power supply, each XM
system must be connected to chassis or earth ground. Conversely, XM systems
that do not share a common single-point ground require their own power
supply. See Figure 2.6.
Figure 2.6 Grounded XM Systems with Separate Power Supplies
Transducer Ground
Make certain the transducers are electrically isolated from chassis ground.
Cable shields must be grounded at one end of the cable, and the other end left
floating or not connected. It is recommended that where possible, the cable
shield be grounded at the XM terminal base and not at the transducer.
DeviceNet Power Supply Ground
The DeviceNet network power supply must also be grounded to earth or
chassis ground at a single point. XM modules do not require an external
DeviceNet power supply. In an XM-only system installation, connect
DeviceNet V- to earth ground at one of the XM modules, as shown in Figure
2.7.
Power
Supply
1440-REX00-04RD
Power
Supply
EXPANSION RELAY 1440-REX00-04RD
EXPANSION RELAY 1440-REX00-04RD EXPANSION RELAY 1440-REX00-04RD
EXPANSION RELAY
DYNAMIC MEASUREMENT 1440-VST02-01RA DYNAMIC MEASUREMENT 1440-VST02-01RA
POSITION 1440-TSP02-01RB MASTER RELAY 1440-RMA00-04RC

Publication ENMON-UM123A-EN-P - October 2004
Installing the XM-123 Aeroderivative Module 11
Figure 2.7 Grounded DeviceNet V- at XM Module
In a system installation in which other DeviceNet products and a separate
DeviceNet power supply are present, the earth ground connection should be
made at the DeviceNet power supply and not at the XM module. See Figure
2.8.
Figure 2.8 Grounded DeviceNet V- at DeviceNet Power Supply.
Switch Input Power Supply Ground
In addition, the switch input power supply must be grounded at a single point.
Connect the Switch RTN signal to chassis or earth ground at either the XM
system, the switch, or other equipment that is wired to this switch.
Mounting the Terminal
Base Unit
The XM family includes several different terminal base units to serve all of the
XM modules. The XM-940 terminal base, Entek Cat. No. 1440-TB-A, is the
only terminal base unit used with the XM-123 module.
DNet
Power
Supply
DNet Power V+
DNet Power V-
V- V+

Publication ENMON-UM123A-EN-P - October 2004
12 Installing the XM-123 Aeroderivative Module
Use the following steps to mount the XM-940 terminal base unit on a DIN
rail.
1. Position the terminal base on the 35 x 7.5mm DIN rail (A).
2. Slide the terminal base unit over leaving room for the side
connector (B).
ATTENTION The XM modules make a chassis ground connection
through the DIN rail. Use zinc plated, yellow chromated
steel DIN rail to assure proper grounding. Using other
DIN rail materials (e.g. aluminum, plastic, etc.), which can
corrode, oxidize or are poor conductors can result in
improper or intermittent platform grounding.
If you are not using the recommended DIN rail, connect
one of the chassis ground terminals on the XM terminal
base to a DIN Rail Grounding Block (C).
Position terminal base at a slight angle and hook over the top of the DIN rail.