Important User Information2
Power Requirements8
Interconnect Limit8
Wiring Requirements9
Grounding Requirements9
Mounting on the DIN Rail14
Wiring17
Specifications19
2 XM-940 Dynamic Measurement Terminal Base
WARNING
ATTENTION
IMPORTANT
SHOCK HAZARD
BURN HAZARD
Important User Information
Solid-state equipment has operational characteri stics differing from those of electromechanical equipment. Safety
Guidelines for the Application, Installation and Maintenance of S olid State Controls (publication SGI-1.1
local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/
important differences between solid-state equipment and hard-wired elec tromechanical devices. Because of this
difference, and also because of the wide variety of uses for so lid-state equipment, all persons responsible for applying this
equipment must satisfy themselves th at each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be respons ible 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 assu me 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 manu al.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, In c., is
prohibited.
Throughout this manual, when necessar y, we use notes to make you aware of safety considerations.
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.
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 and recognize the consequences.
available fro m your
) describes some
Publication GMSI10-IN020C-EN-P - October 2013
Labels may be on or inside the equipment (for example, drive or motor) to alert people
that dangerous voltage may be present.
Labels may be on or inside the equipment (for example, drive or motor) to alert people
that surfaces may reach dangerous temperatures.
Identifies information that is critical for successful application and understanding of
the product.
XM-940 Dynamic Measurement Terminal Base 3
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 IEC
60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is not intended for use in residential environments and may not
provide adequate protection to radio communication services in such
environments.
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 enclosure must have
suitable flame-retardant properties to prevent or minimize the spread of flame,
complying with a flame spread rating of 5VA or be approved for the application
if nonmetallic. 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.
In addition to this publication, see the following:
• Industrial Automation Wiring and Grounding Guidelines, publication
, for additional installation requirements
1770-4.1
• NEMA 250 and IEC 60529, as applicable, for explanations of the degrees
of protection provided by enclosures
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4 XM-940 Dynamic Measurement Terminal Base
ATTENTION
Preventing Electrostatic Discharge
This equipment is sensitive to electrostatic discharge, which can cause
internal damage and affect normal operation. Follow these guidelines when
you handle this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wrist strap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in
use.
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XM-940 Dynamic Measurement Terminal Base 5
WARNING
AVERTISSEMENT
North American Hazardous Location Approval
The following information applies when
operating this equipment in hazardous
locations.
Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for
use in Class I Division 2 Groups A, B, C, D, Hazardous
Locations and nonhazardous locations only. Each product is
supplied with markings on the rating na meplate indicating
the hazardous location temperature code. When
combining products within a system, the most adverse
temperature code (lowest "T" number) m ay be used to help
determine the overall temperature code of the system.
Combinations of equipment in your system are subject to
investigation by the local Authority H aving Jurisdiction at
the time of installation.
EXPLOSION HAZARD -
• Do not disconnect eq uipment unless
power has been removed or the
area is known to be nonhazardous.
• Secure any external connections
that mate to this equipment by
using screws, sliding latches,
threaded connectors, or other
means provided with this product.
• Substitution of components may
impair suitability for Class I,
Division 2.
• If this product contains batteries,
they must only be changed in an
area known to be nonhazardous.
Informations sur l’utilisation de cet
équipement en environnements dangereux.
Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne
conviennent qu'à une utilisation en environnements de
Classe I Division 2 Groupes A, B, C, D dangereux et non
dangereux. Chaque produit est livré avec des marqua ges sur
sa plaque d'identification qui indiquent le code de
température pour les environneme nts dangereux. Lorsque
plusieurs produits sont combinés dans un système, le code de
température le plus défavorable (co de de température le plus
faible) peut être utilisé pour déterminer le code de
température global du système. Les comb inaisons
d'équipements dans le système sont sujettes à inspection par
les autorités locales qualifiées au moment de l'installation.
RISQUE D’EXPLOSION –
• Couper le courant ou s'assurer
que l'environnement est classé
non dangereux avant de
débrancher l'équipement.
• Couper le courant ou s'assurer
que l'environnement est classé
non dangereux avant de
débrancher les connecteurs. Fixer
tous les connecteurs externes
reliés à cet équipement à l'aide
de vis, loquets coulissants,
connecteurs filetés ou autres
moyens fournis avec ce produit.
• La substitution de composants
peut rendre cet équipement
inadapté à une utilisation en
environnement de Classe I,
Division 2.
• S'assurer que l'environnement est
classé non dangereux avant de
changer les piles.
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6 XM-940 Dynamic Measurement Terminal Base
ATTENTION
European Hazardous Location Approval
European Zone 2 Certification (The following applies when the product bears the
Ex Marking.)
This equipment is intended for use in potentially explosive atmospheres as defined by
European Union Directive 94/9/EC and has been found to comply with the Essential Health
and Safety Requirements relating to the design and construction of Category 3 equipment
intended for use in Zone 2 potentially explosive atmospheres, given in Annex II to this
Directive.
Compliance with the Essential Health and Safety Requirements has been assured by
compliance with EN 60079-0 and EN 60079-15.
This equipment is not resistant to sunlight or other sources of UV radiation.
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XM-940 Dynamic Measurement Terminal Base 7
WARNING
WARNING
ATTENTION
WARNING
• This equipment shall be mounted in an ATEX-certified enclosure with a
minimum ingress protection rating of at least IP54 (as defined in
IEC 60529) and used in an environment of not more than Pollution Degree
2 (as defined in IEC 60664-1) when applied in Zone 2 environments. The
enclosure must have a tool-removable cover or door. The installation of
the product within an ATEX approved enclosure shall not raise the
surrounding ambient temperature above the limit specified for the
product.
• This equipment shall be used within its specified ratings defined by
Rockwell Automation. The XM-940 is only approved for use with ATEX
approved measurement modules with relays up to 120V AC.
• Provision shall be made to prevent the rated voltage from being exceeded
by transient disturbances of more than 140% of the rated voltage when
applied in Zone 2 environments.
• Secure any external connections that mate to this equipment by using
screws, sliding latches, threaded connectors, or other means provided
with this product.
• Do not disconnect equipment unless power has been removed or the area
is known to be nonhazardous.
An electrical arc can occur if you do the following:
• Insert or remove the module while backplane power is on
• Connect or disconnect wiring while the field-side power is on
This can cause an explosion in hazardous location installations. Be sure that
power is removed or the area is
nonhazardous before proceeding.
Do not remove or replace a terminal base unit while power is applied.
Interruption of the backplane can result in unintentional operation or
machine motion.
Wiring to or from this device, which enters or leaves the system enclosure,
must utilize wiring methods suitable for Class I, Division 2 Hazardous
Locations, as appropriate for the installation in accordance with the product
drawings as indicated in the following table.
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8 XM-940 Dynamic Measurement Terminal Base
IMPORTANT
TIP
There are no drawings associated with the XM-124 Standard Dynamic
Measurement Module, catalog number 1440-SDM02-01RA. Be sure that
the installer follows all applicable local and regional requirements for
installation of the product in the planned location and environment.
Power Requirements
Refer to the XM-124 Standard Dynamic Measurement installation guide,
publication 1440-IN001, for specific power consumption and other
requirements.
Refer to the XM Power Supply Solutions Application Technique, publication
ICM-AP005
, for additional details.
Interconnect Limit
Total current draw through the side connector cannot exceed 3 A. A separate
power connection is necessary if the total current draw of the interconnecting
modules is greater than 3 A.
If the total current draw for a row of modules is greater than 3 A, consider
connecting power to a module near the center of the rail, rather than at a
module on either end. Insure that there is less than 3 A load in either direction
from the module where power is connected.
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XM-940 Dynamic Measurement Terminal Base 9
ATTENTION
ATTENTION
Wiring Requirements
Use solid or stranded wire. All XM wiring should meet the following
specifications:
• 0.34…2.1 mm
pretreatment; 8.4 mm
2
(22…14 AWG) copper conductors without
2
(8 AWG) required for grounding the DIN rail
for electromagnetic interference (EMI) purposes
• Recommended strip length 8 mm (0.31 in.)
• Minimum insulation rating of 300V
• Soldering the conductor is forbidden
• Wire ferrules can be used with stranded conductors; copper ferrules
recommended
Do not wire more than two conductors onto any single terminal.
Grounding Requirements
Use these grounding requirements to ensure safe electrical operating
circumstances, and to help avoid potential EMI and ground noise that can
cause unfavorable operating conditions for your XM system.
DIN Rail Grounding
This product is grounded through the DIN rail to chassis ground. Use
zinc-plated, yellow-chromate steel DIN rail to assure proper grounding. The
use of other DIN rail materials (for example, aluminum or plastic) that can
corrode, oxidize, or are poor conductors, can result in improper or
intermittent grounding. Secure DIN rail to mounting surface approximately
every 200 mm (7.8 in.) and use end-anchors appropriately.
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10 XM-940 Dynamic Measurement Terminal Base
Power
Supply
DYNAMIC MEASUREMENT
1440-VST02-01RA
DYNAMIC MEASUREMENT
1440-VST02-01RA
POSITION
1440-TSP02-01RB
MASTER RELAY
1440-RMA00-04RC
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
EXPANSION RELAY
1440-REX00-04RD
EXPANSION RELAY
1440-REX00-04RD
1
1
2
2
2
XM System DIN Rail Grounding
1Use 2.1 mm2 (14 AWG) wire.
2Use 8.4 mm
2
(8 AWG) wire.
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XM-940 Dynamic Measurement Terminal Base 11
IMPORTANT
1
The grounding wire can be connected to the DIN rail by using a DIN Rail
Grounding Block (see illustration below).
DIN Rail Grounding Block
1Use 8.4 mm2 (8 AWG) wire.
24V Common Grounding
24V to the XM module must be grounded. When two or more power supplies
power the XM system, ground the 24V Commons at a single point, such as
the ground bus bar.
If it is not possible or practical to ground the -24V DC supply, then it is
possible for the system to be installed and operate ungrounded. However, if
installed ungrounded then the system must not be connected to a ground
through any other circuit unless that circuit is isolated externally.
Connecting a floating system to a non-isolated ground could result in
damage to the XM module(s) and/or any connected device. Also, operating
the system without a ground may result in the system not performing to the
published specifications regards measurement accuracy and
communications speed, distance or reliability.
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12 XM-940 Dynamic Measurement Terminal Base
IMPORTANT
ATTENTION
To
Ground
Bus
The 24V Common and Signal Common terminals are internally connected.
They are isolated from the Chassis terminals unless they are connected to
ground as described in this manual. See Wirin
assignments.
g on page 17 for terminal
Transducer Grounding
Make certain the transducers are electrically isolated from earth ground. Cable
shields must be grounded at one end of the cable, and the other end left
floating or not connected. We recommend that where possible, the cable
shield be grounded at the XM terminal base (Chassis terminal) and not at the
transducer.
DeviceNet Grounding - XM-120, XM-121, XM-122, and XM-123 Modules
The DeviceNet network is functionally isolated and must be referenced to
earth ground at a single point. XM modules can not be used with an external
DeviceNet power supply. Connect DeviceNet V- to earth ground at one of
the XM modules, as shown in the illustration below.
Grounded DeviceNet V- at XM Module
Use of a separate DeviceNet power supply is not permitted. See the XM Power
Supply Solutions Application Profile, publication ICM-AP005
using the XM module with other DeviceNet products.
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, for guidance in
XM-940 Dynamic Measurement Terminal Base 13
DeviceNet Grounding - XM-124 Module Only
The DeviceNet network is fully isolated from the XM-124 power and ground
circuits. Therefore, DeviceNet network can be powered from any suitable
DeviceNet power supply, and must be grounded at that power supply in
accordance with DeviceNet installation instructions.
Switch Input Grounding
The Switch Input circuits are functionally isolated from other circuits. It is
recommended that the Switch RTN signal be grounded at a single point.
Connect the Switch RTN signal to the XM terminal base (chassis terminal) or
directly to the DIN rail, or ground the signal at the switch or other equipment
that is wired to the switch.
Additional DeviceNet Installation Information
For more information on the DeviceNet installation, refer to the ODVA
Planning and Installation Manual - DeviceNet Cable System, which is
available on the ODVA website (http://www.odva.org
).
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14 XM-940 Dynamic Measurement Terminal Base
Position terminal base at a slight angle and hook over the top of the DIN rail.
Mounting on the DIN Rail
You can also mount the terminal base to a grounded mounting plate. Refer to
the XM-124 Standard Dynamic Measurement Module User Manual,
publication 1440-UM001
1. Position the terminal base unit on the 35 x 7.5mm DIN rail (A)
(Allen-Bradley pt no. 199-DR1 or 199-DR4) at a slight angle.
.
2. Slide the terminal base unit over leaving room for the side
connector (B).
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XM-940 Dynamic Measurement Terminal Base 15
3. Hook the lip on the rear of the terminal base onto the top of the DIN
rail, and rotate the terminal base onto the rail.
4. Press down on the terminal base unit to lock the terminal base on the
DIN rail. If the terminal base does not lock into place, use a
screwdriver or similar device to open the locking tab, press down on
the terminal base until flush with the DIN rail and release the locking
tab to lock the base in place.
5. Connect the wiring for the XM-940 terminal base unit as shown in
Wiring on page 17
.
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16 XM-940 Dynamic Measurement Terminal Base
IMPORTANT
Interconnecting Terminal Base Units
Follow the steps below to install another terminal base unit.
Terminal base units are mounted left to right on the DIN rail.
1. Position the terminal base on the 35 x 7.5mm DIN rail (A).
2. Make certain the side connector (B) is fully retracted into the base
unit.
3. Slide the terminal base unit over tight against the neighboring terminal
base. Make sure the hook on the terminal base slides under the edge
of the terminal base unit.
4. Press down on the terminal base unit to lock the terminal base on the
DIN rail. If the terminal base does not lock into place, use a
screwdriver or similar device to open the locking tab, press down on
the terminal base until flush with the DIN rail and release the locking
tab to lock the base in place.
5. Gently push the side connector into the side of the neighboring
terminal base to complete the backplane connection.
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Wiring
IMPORTANT
WARNING
ATTENTION
For more wiring connection information, refer to the XM-124 Standard
Dynamic Measurement Module User Manual, publication 1440-UM001
Terminal Assignments
If you connect or disconnect wiring while the field-side power is on, an
electrical arc can occur. This could cause an explosion in hazardous location
installations.
Be sure that power is removed or the area is nonhazardous before
proceeding.
The terminal block assignments are different for different terminal base units.
The following table applies only to the XM-940 terminal base. Refer to the
installation instructions for the specific terminal base unit for its terminal
assignments.
20Tachometer (-)46Relay N.C. contact 1 (reserved if XM-124)
21Buffer/Xducer Power (-)47Relay common contact 1
22Buffer Power 2 input48Relay N.O. contact 1
23CAN_High (white wire)49Relay N.O. contact 2 (reserved if XM-124)
24CAN_Low (blue wire)50Relay common contact 2 (reserved if XM-124)
25+24V out51Relay N.C. contact 2 (reserved if XM-124)
1
1
1
35Chassis
42Reserved
43
24 V common
4424 V in
24 V common
1
1
The DeviceNet power circuit through the XM module interconnect, which is
rated at only 300 mA, is not intended or designed to power DeviceNet loads.
Doing so could damage the module or terminal base.
1Terminals are internally connected and isolated from the chassis terminals.
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XM-940 Dynamic Measurement Terminal Base 19
Specifications
The following table lists the technical specifications for the XM-940 Dynamic
Measurement Terminal Base
Technical Specifications
Attribute1440-TB-A
Backplane power24V DC, 350 mA Class 2 / SELV
Relay120V AC, 50/60 Hz, 0.5 A resistive
ExEuropean Union 94/9/EC ATEX Directive, compliant with:
• EN 60079-15:2010; Potentially Explosive Atmospheres,
Protection "n"
• EN 60079-0:2012; General Requirements II Ex nA IIC T4 Gc
KCKorean Registration of Broadcasting and Communications Equipment,
(1)
When marked. See the Product Certification link at http://www.ab.com for Declarations of Conformity,
Certificates, and other certification details.
compliant with Article 58-2 of Radio Waves Act, Clause 3.
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Rockwell Automation Support
Rockwell Automation provides technical i nformation on the Web to assist you in using its prod ucts.
At http://www.rockwellautomation.com/support
code and links to software service packs, and a MySupport feature that you can customize to make the best use of these tools.
You can also visit our Knowledgebase at http://www.rockwellautomation.com/knowled gebase
support chat and forums, sof tware updates, and to sign up for product notification updates.
For an additional level of technical phone support for inst allation, configuration and troubleshooting, we offer TechConnect
support programs. For more information, contact your local distributor or Rockwell Automation representative, or visit
http://www.rockwellautomation.com/support/
, you can find technical manuals, technical and applic ation notes, sample
for FAQs, technical information,
.
Installation Assistance
If you experience a problem within the first 24 hours of installation, please review the inform ation that's contained in this
manual. You can also contact a special Customer Support number for initial help in getting your product up and running.
Rockwell Automation tests all of its products to h elp ensure that they are fully operational when shipped from the
manufacturing facility. However, if your product is not functioning and needs to be returned, follow the se procedures.
United States
Outside United StatesPlease contact your local Rockwell Automation representative for the return procedure.
Contact your distributor. You must provide a Customer Support case number (call the phone
number above to obtain one ) to your distributor to complete the return process.
Documentation Feedback
Your comments will help us serve your documentation needs bette r. If you have any suggestions on how to imp rove this
document, complete this form, publication RA-DU002
, available at http://www.rockwellautomation.com/literature/.
SM
Allen-Bradley, Rockwell Software, Rockwell Automation, and XM are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
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