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XM-943 Expansion Relay
Terminal Base
Catalog Number 1440-TB-D
Installation Instructions
For information about See page
Important User Information 2
Safety Approvals 4
Power Requirements 6
Interconnect Limit 7
Wiring Requirements 7
Grounding Requirements 8
Mounting on the DIN Rail 11
Wiring 13
Agency Certification 15
Specifications 16
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2 XM-943 Expansion Relay Terminal Base
WARNING
IMPORTANT
ATTENTION
SHOCK HAZARD
BURN HAZARD
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://literature.rockwellautomation.com
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, when necessary, 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 that is critical for successful application and understanding of
the product.
) describes some important differences between solid state
Publication GMSI10-IN023A-EN-P - May 2010
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.
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.
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XM-943 Expansion Relay Terminal Base 3
ATTENTION
ATTENTION
Environment and Enclosure
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 persona l
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.
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 wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• If available, use a static-safe workstation.
• When not in use, keep modules in appropriate static-safe packaging.
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4 XM-943 Expansion Relay Terminal Base
WARNING
AVERTISSEMENT
Safety Approvals
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 Authorit y Having 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.
• Do not disconnect connections to
this equipment 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 environnement s 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 pa r
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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XM-943 Expansion Relay Terminal Base 5
IMPORTANT
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.
Model Catalog Number Haz Location Drawings*
w/o Barriers w/ Barriers
XM-120 1440-VST0201RA
XM-121 1440-VLF0201RA
XM-122 1440-VSE0201RA
XM-123 1440-VAD0201RA
XM-160 1440-VDRS0600RH
XM-161 1440-VDRS0606RH
XM-162 1440-VDRP0600RH
XM-220 1440-SPD0201RB 48640-HAZ 48641-HAZ
XM-320 1440-TPS0201RB 48238-HAZ 48239-HAZ
XM-360 1440-TPR0600RE
XM-361 1440-TUN0600RE
XM-361 1440-TTC0600RE
XM-440 1440-RMA0004RC 48240-HAZ N/A
XM-441 1440-REX0004RD 48241-HAZ N/A
XM-442 1440-REX0304RG 48642-HAZ N/A
* Drawings are available on the included CD
48178-HAZ 48179-HAZ
51263-HAZ 51264-HAZ
48295-HAZ 48299-HAZ
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IMPORTANT
European Zone 2 Certification
If appropriately marked, this equipment is intended for use in potentially explosive
atmospheres as defined by European Union Directive 94/9/CE.
Compliance with the Essential Health and Safety Requirements has been assured by
compliance with EN 50021 (1999).
Observe the following additional Zone 2 certification requirements:
• This equipment is not resistant to sunlight or other sources of UV
radiation.
• The secondary of a current transformer shall not be open–circuited.
• The marking “ALCR” is to be considered “as applicable” to individual
products.
• Equipment of lesser Enclosure Type Rating must be installed in an
enclosure providing at least IP54 protection when applied in Class I,
Zone 2 environments.
• This equipment must be powered by energy limited associated
equipment as defined in EN 50021 when applied in Class I, Zone 2
environments.
• Provision shall be made to prevent the rated voltage from being
exceeded by transient disturbances of more than 40% when applied in
Class I, Zone 2 environments.
Power Requirements
Power Supply
Requires a 24Vdc (±10%) power source per the following table.
XM Power Supply Requirements
Listed Class 2 rated supply, or
Protection
Output Voltage 24Vdc ± 10%
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Fused* ITE Listed SELV supply, or
Fused* ITE Listed PELV supply
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XM-943 Expansion Relay Terminal Base 7
TIP
Output Power 100 Watts Maximum (~4A @ 24Vdc)
Static Regulation ± 2%
Dynamic Regulation ± 3%
Ripple < 100mVpp
Output Noise Per EN50081-1
Overshoot < 3% at turn-on, < 2% at turn-off
Hold-up Time As required (typically 50mS at full rated load
* When a fused supply is used the fuse must be a 5 amp, listed, fast acting fuse such as
provided by Allen-Bradley part number 1440-5AFUSEKIT.
Refer to the specifications for the specific module for power consumption
and other requirements.
See XM Power Supply Solutions application technique, publication
ICM-AP005A-EN-E, for additional details.
Interconnect Limit
Total current draw through the side connector cannot exceed 3A. A separate
power connection is necessary if the total current draw of the interconnecting
modules is greater than 3A.
If the total current draw for a row of modules is greater than 3A, 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 3A load in either direction
from the module where power is connected.
Wiring Requirements
Use solid or stranded wire. All XM wiring should meet the following
specifications:
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8 XM-943 Expansion Relay Terminal Base
ATTENTION
• 14 to 22 AWG copper conductors without pretreatment; 8 AWG
required for grounding the DIN rail for electromagnetic interference
(emi) purposes
• Recommended strip length 8 millimeters (0.31 inches)
• Minimum insulation rating of 300V
• Soldering the conductor is forbidden
• Wire ferrules can be used with stranded conductors; copper ferrules
recommended
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.
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
The XM modules make a chassis ground connection through the DIN rail.
The DIN rail must be connected to a ground bus or grounding electrode
conductor using 8 AWG or 1 inch copper braid. See illustration on the
following page.
Use zinc-plated, yellow-chromated steel DIN rail (Allen-Bradley part no.
199-DR1 or 199-DR4) or equivalent 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.
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XM System DIN Rail Grounding
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
XM-943 Expansion Relay Terminal Base 9
1 Use 14 AWG wire.
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10 XM-943 Expansion Relay Terminal Base
IMPORTANT
IMPORTANT
The grounding wire can be connected to the DIN rail using a DIN Rail
Grounding Block (see illustration below).
DIN Rail Grounding Block
24V Common Grounding
24V to the XM module must be grounded. When two or more power supplies
power the XM system, ground the 24 V Commons at a single point, such as
the ground bus bar.
If it is not possible or practical to ground the -24Vdc 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.
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 Wiring on
assignments.
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XM-943 Expansion Relay Terminal Base 11
ATTENTION
IMPORTANT
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-441 Expansion Relay User Guide for details.
The XM-943 makes 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.
The XM-943 terminal base unit is mounted to the right of the XM module to
which it is providing additional relays.
1. Position the terminal base unit on the 35 x 7.5mm DIN rail (A) (A-B
pt no. 199-DR1 or 199-DR4) at a slight angle.
2. Make certain the side connector (B) is fully retracted into the base
unit.
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12 XM-943 Expansion Relay Terminal Base
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 adjacent base and the side connector is fully retracted.
4. Rotate the terminal base onto the DIN rail with the top of the rail
hooked under the lip on the rear of the terminal base.
5. Press down on the ter minal 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.
6. Gently push the side connector into the side of the neighboring
terminal base to complete the backplane connection.
7. Repeat the above steps to install another XM-943 terminal base unit.
8. Connect the wiring for the XM-943 terminal base unit as shown
Wiring later in this document.
under
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Wiring
IMPORTANT
WARNING
ATTENTION
For more wiring connection information, refer to the XM-441
Expansion Relay User Guide.
Terminal Assignments
EXPLOSION HAZARD
Do not disconnect equipment unless power has been removed
or the area is known to be nonhazardous.
Do not disconnect connections to this equipment 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.
XM-943 Expansion Relay Terminal Base 13
The terminal block assignments are different for different
terminal base units. The following table applies only to the
XM-943. Refer to the installation instructions for the specific
terminal base unit for its terminal assignments.
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No. Description No. Description
0 No connection 26 No connection
1 No connection 27 Relay 3 common contact 1
2 No connection 28 Relay 4 common contact 2
3 Reserved 29 Relay 4 common contact 1
4 Relay 1 N.O. contact 2 30 No connection
5 Relay 1 N.O. contact 1 31 Chassis ground
6 Relay 2 N.O. contact 2 32 DeviceNet V (+) (red wire) (Optional,
see IMPORTANT note below)
7 No connection 33
CAN_High (white wire)
8 Relay 2 N.O. contact 1 34 No connection
9 Relay 3 N.O. contact 2 35 No connection
10 No connection 36 No connection
11 Relay 3 N.O. contact 1 37 No connection
12 Relay 4 N.O. contact 2 38 Relay 1 N.C. contact 2
13 Relay 4 N.O. contact 1 39 Relay 1 N.C. contact 1
14 No connection 40 Relay 2 N.C. contact 2
15 Chassis ground 41 No connection
16 No connection 42 Relay 2 N.C. contact 1
17 No connection 43 Relay 3 N.C. contact 2
18 No connection 44 No connection
19 No connection 45 Relay 3 N.C. contact 1
20 Relay 1 common contact 2 46 Relay 4 N.C. contact 2
21 Relay 1 common contact 1 47 Relay 4 N.C. contact 1
22 Relay 2 common contact 2 48 No connection
23 No connection 49 Chassis ground
1
1
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XM-943 Expansion Relay Terminal Base 15
IMPORTANT
No. Description No. Description
24 Relay 2 common contact 1 50
25 Relay 3 common contact 2 51
DeviceNet V (-) (black wire)
CAN_Low (blue wire)
1
1
The DeviceNet power circuit through the XM module interconnect, whichis
rated at only 300mA, is not intended or designed to power DeviceNet loads.
Doing so could damage the module or terminal base.
To preclude this possibility, even unintentionally, it is recommended that
DeviceNet V+ be left unconnected.
1 DeviceNet communication is not used by the XM-943 but DeviceNet connections are available on the
terminal base unit and the side connector.
Agency Certification (when product marked)
UL UL Listed for Ordinary Locations
UL UL Listed for Class I, Division 2 Group A, B, C, and D Hazardous Locations
CSA CSA Certified Process Control Equipment
CSA CSA Certified Process Control Equipment for Class I, Division 2 Group A, B, C,
and D Hazardous Locations
2
EEX
CE
C-Tick
European Union 94/9/EEC ATEX Directive, compliant with EN 50021; Potentially
Explosive Atmospheres, Protection “n”
2
European Union 89/336/EEC EMC Directive
2
Australian Radiocommunications Act, compliant with:
AS/NZS 2064, Industrial Emissions
2 See the Product Certification link at www.rockwellautomation.com for Declarations of Conformity,
Certificates and other certification details.
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Specifications
The following table lists the technical specifications for the XM-943
Expansion Relay Terminal Base.
Product Feature Specification
Power
Module
+21.6 to +26.4V dc
Consumption
Heat Production
Environmental
Operating Temperature
Storage Temperature
Relative Humidity
Conformal Coating
Physical
Dimensions
Terminal Screw Torque
120mA maximum
2.9 Watts (9.9 BTU/Hr) maximum
-20 to +65°C (-4 to +149°F)
-40 to +85°C (-40 to +185°F)
95% non-condensing
All printed circuit boards are conformally coated in
accordance with IPC-A-610C.
3.875 W x 3.75 D x 2.25 H inches
9.48 W x 9.53 D x 5.72 H centimeters
7 pound-inches (0.6 Nm)
Note: Power specification is with module installed.
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XM-943 Expansion Relay Terminal Base 17
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Rockwell Automation Support
Rockwell Automation provides technical information on the Web to assist you in using its products. At
http://www.rockwellautomation.com/support/
technical and application notes, sample code and links to software service packs, and a MySupport feature
that you can customize to make the best use of these tools.
For an additional level of technical phone support for installation, 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/
Installation Assistance
If you experience a problem within the first 24 hours of installation, please review the information 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.
United States or Canada 1.440.646.3434
Outside United States or
Canada
Use the Worldwide Locator
http://www.rockwellautomation.com/support/americas/phone_en.html
contact your local Rockwell Automation representative.
New Product Satisfaction Return
Rockwell Automation tests all of its products to 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
these procedures.
United States Contact your distributor. You must provide a Customer Support case number
Outside United States Please contact your local Rockwell Automation representative for the return
(call the phone number above to obtain one) to your distributor to complete
the return process.
procedure.
Documentation Feedback
Your comments will help us serve your documentation needs better. If you have any suggestions on how to
improve this document, complete this form, publication RA-DU002
http://literature.rockwellautomation.com
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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.
Publication GMSI10-IN023A-EN-P - May 2010 PN-71169
Supersedes Publication GMSI10-UM023A-EN-E - January 2006 Copyright © 2010 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
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