Page 1
Installation Instructions
FLEX Ex Terminal Base Units
Catalog Numbers 1797-TB3 and 1797-TB3S
Contents
For Information About See Page
Important User Information 2
Description 2
Installation in Zone 1 5
Installation in Zone 22 5
Electrostatic Charge 6
European Community Directive Compliance 6
Inputs and Outputs 7
Wire the Terminal Base Units 8
Mount on a DIN Rail 10
Mounting Dimensions 13
About the Mounting Kit 15
Repair 15
Specifications - 1797-TB3 and 1797-TB3S Terminal Base Units 16
UL, C-UL Certification 18
FM Certification 19
Publication 1797-5.1 - June 2010
Page 2
2 FLEX Ex Terminal Base Units
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
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.
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.
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.
Labels may be located on or inside the equipment to alert people that dangerous voltage may be
present.
http://www.literature.rockwellautomation.com)
Labels may be located on or inside the equipment to alert people that surfaces may be
dangerous temperatures.
Description
The 1797-TB3 and 1797-TB3S terminal bases have 36 wiring connections to
and from a plug-in module. The use of each terminal depends on the module
mounted in the base.
Publication
1797-5.1 - June 2010
Page 3
FLEX Ex Terminal Base Units 3
0 12345 67 89101112131415
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
34 35 36 37 38 39 40 41 42 43 45 46 47 48 49 5044 51
1
5
6
7
8
9
10
12
Label
11
2
3
4
Only remove this cover plug if
connecting another terminal base.
41251
Only remove this cover plug if
connecting another terminal base.
41253
Both terminal bases are equipped with a factory-installed tab cover for the
backplane bus connection. The tab cover may be removed only when the
terminal base is connected to other terminal bases.
1797-TB3 Screw-cage Terminal Base
1797-TB3S Spring-clamp Terminal Base
11
10
1
5
6
7
8
9
4
3
12
2
Label
Component Identification
1 Female flexbus connector 6, 7, 8Input/output terminal strips for connecting
2 Terminal base unit 9 Locking tab
3 Male flexbus connector 10 Module locking latch
4 Keyswitch - Set to the position
required for the installed module
5 Mounting holes for panel mounting 12 96-pin female I/O connector
input/output wiring, -V, +V connections
11 Cover plug for male flexbus connector
Publication
1797-5.1 - June 2010
Page 4
4 FLEX Ex Terminal Base Units
ATTENTION
41307
This equipment is considered Group 1, Class A industrial
equipment according to IEC/CISPR Publication 11. Without
appropriate precautions, there may be potential difficulties
ensuring electromagnetic compatibility in other environments
due to conducted as well as radiated disturbance.
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.
You will need to rotate the keyswitch (4) to the correct position depending on
the I/O module. Refer to the I/O module’s installation instructions for more
information.
Do not change the position of the keyswitch after wiring the terminal
base.
Make certain that you only connect terminal bases to other intrinsically safe
system modules or adapters to maintain the integrity of the intrinsically-safe
backplane.
Do not remove the rightmost terminal base flexbus cover (11).
Publication
1797-5.1 - June 2010
Page 5
FLEX Ex Terminal Base Units 5
WARNING
Installation in Zone 1
The terminal bases must not be exposed to the environment. Provide a
suitable metal enclosure. The terminal bases have a protection factor of IP20.
Do not remove the flexbus cover on the rightmost terminal base.
The terminal bases cannot be used in an intrinsically safe
environment after having been exposed to nonintrinsically safe
signals.
Installation in Zone 22
When the terminal bases are installed in Zone 22, the following cabinets must
be used: IVK-ISRPI-V16LC; IVK-ISRPI-V8HYW; or IVK-ISRPI-V8LC.
These cabinets can be purchased from:
Pepperl+Fuchs GmbH
Lilienthalstrasse 200
68307 Mannheim, Germany
Attn: PA Sales Dept.
Kirsten Becker
Telephone +49 776 1298
www.pepperl-fuchs.com
The IS-RPI cabinets (type IVK2-ISRPI-V8LC, IVK2-ISRPI-V8HYW, or
IVK2-ISPRI-V16LC) ensures the basic protection for the intrinsically safe
apparatus of the FLEX Ex system for use in Zone 22. It corresponds with
category 3D according to RL 94/9 EG and with the type label marked with
the following information:
Pepperl+Fuchs GmbH
68307 Mannheim
IVK2-ISRPI-V8LC (or IVK2-ISRPI-V8HYW or
IVK2-ISRPI-V16LC)
II 3 D Ex tD A22 IP54 T70 °C
CE
Serial (manufacturing) number
Model
Publication
1797-5.1 - June 2010
Page 6
6 FLEX Ex Terminal Base Units
Electrostatic Charge
Protect the system against electrostatic charge. Post a sign near this module:
WARNING Avoid electrostatic charging.
ADVERTÊNCIA! PREVENIR CONTRA O ACÚMULO DE CARGA
ELETROSTÁTICA.
For your convenience, a sign that can be cut out and posted is included in this
installation instruction.
European Community Directive Compliance
If these products have the CE mark they are approved for installation within
the European Community or EEA regions. They have been designed and
tested to meet the following directives.
EMC Directive
These products are tested to meet the Council Directive 2004/108/EC by
applying the following standards:
EN 61000-6-4:2007, Electromagnetic Compatibility (EMC) - Part 6-4:
Generic Standard for Industrial Environments (Class A)
EN 61000-6-2:2005, Electromagnetic Compatibility (EMC) - Part 6-2:
Generic Standards - Immunity for Industrial Environments
EN61326-1:2006 (Industrial), Electrical Equipment For
Measurement, Control, and Laboratory Use - Industrial EMC
Requirements
ATEX Directive
These products are tested in conjunction with associated I/O modules to
meet the Council Directive 94/9/EC (ATEX) Equipment and Protective
Systems Intended for Use in Potentially Explosive Atmospheres by applying
the following standards:
EN60079-11:2007, Explosive atmospheres - Part 11 : equipment
protection by intrinsic safety "i"
EN60079-0:2006, Electrical apparatus for explosive gas atmospheres -
Part 0 : general requirements
Publication
1797-5.1 - June 2010
Page 7
FLEX Ex Terminal Base Units 7
IMPORTANT
EN 60079-26 : 2004, Electrical apparatus for explosive gas
atmospheres - Part 26 : construction, test and marking of Group II
Category 1 G electrical apparatus
EN61241-0 : 2006, Electrical apparatus for use in the presence of
combustible dust - Part 0: General requirements
EN61241-11:2006, Electrical apparatus for use in the presence of
combustible dust – Part 11: Protection by intrinsic safety 'iD'
Inputs and Outputs
Do not apply any nonintrinsically safe signals to the terminal bases.
When using as an intrinsically-safe electrical apparatus according to EN60079,
the European directives and regulations must be followed.
The terminals in the terminal base may be electrically connected to each other
by the insertion of FLEX Ex I/O modules. See the I/O module installation
instructions to determine this.
When interconnecting several lines, you must consider the
total accumulated power and check for intrinsic safety
requirements.
Publication
1797-5.1 - June 2010
Page 8
8 FLEX Ex Terminal Base Units
WARNING
Wiring Connections for Terminal Base 1797-TB3
01 32456789101112131415
26 27 28 29 30 31 32 3325
24
2322212019181716
44 45 46 47 48 495051
43
424140
39
3837363534
41252
+V -V -V+V
A
B
C
No connections allowed to terminals 36 and 49.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
18 19 20 21 22 23 3324 25 26 27 28 29 30 31 3217
35 36 37 38 47 48 49 5034
51
16
39 40 41 42 43 44 45 46
Wiring Connections for Terminal Base 1797-TB3S
41254
Row A
Row B
Row C
Label placed at top of wiring area
Row A
Row B
Row C
+V -V
-V
No connections allowed to terminals 36 and 49.
+V
Wire the Terminal Base Units
Make certain that you power this terminal base unit with an
intrinsically safe power supply. Do not exceed the values listed in
the specifications for this terminal base unit.
To connect wiring, insert a blade-type screwdriver with a blade width of
2.54-3.05 mm (0.100-0.120 in.) into the slot above the selected wiring port
and lift up.
Insert the wire while holding the screwdriver up. Release the upward
screwdriver pressure to secure the wire.
Publication
1797-5.1 - June 2010
Page 9
1. Make wiring connections as described in the installation instructions
ATTENTION
Daisy-chaining
41110
+V, -V
Wiring when total module current power is less than 8.5 W.
Combination
Wiring when total module current power is greater than 8.5 W.
41111
+V, -V
<8.5 W
+V, -V
<8.5 W
You can use the daisy
chain configuration if
the total module power
draw is <8.5 W.
Otherwise, power is
connected to individual
modules.
Other variations are possible depend ing upon individual module power.
2. Connect +V and -V from the terminal base to the next using jumpers
FLEX Ex Terminal Base Units 9
included with the specific module that mounts on your terminal base.
or individual external wiring, if appropriate due to total module power
consumption.
Do not use any unused terminals on the terminal base. Using
these them as supporting terminals can result in damage to the
module and/or unintended operation of your system.
Publication
1797-5.1 - June 2010
Page 10
10 FLEX Ex Terminal Base Units
ATTENTION
WARNING
Mount on a DIN Rail
Do not remove or replace a terminal base when power is
applied. Interruption of the flexbus connection can result in
unintended operation or machine motion.
This product is grounded through the DIN rail to the dedicated
intrinsic safety ground. Use zinc-plated yellow-chromated steel
DIN rail to assure proper grounding. The use of other DIN rail
materials (such as aluminum or plastic) that can corrode, oxidize,
or are poor conductors, can result in improper or intermittent
grounding.
If you insert or remove the terminal base while backplane 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.
1. Remove the cover plug in the male connector of the unit to which you
are connecting this terminal base unit.
2. Check to make sure that the 16 pins in the male connector on the
adjacent device are straight and in line so that the mating female
connector on this terminal base unit will mate correctly.
3. Make certain that the female flexbus connector is fully retracted into
the base unit.
Publication
1797-5.1 - June 2010
Page 11
FLEX Ex Terminal Base Units 11
ATTENTION
A
A
41106
Position terminal base at a slight angle and hook
over the top of the DIN rail (A).
41107
Slide the terminal base tight against the adapter (or preceding terminal base). Make sure the
hook on the terminal base slides under the edge of the adapter (or proceeding terminal base)
and the flexbus connector is fully retracted.
4. Position the terminal base over the 35 x 7.5 mm DIN rail A
(A-B pt. no. 199-DR1).
Do not force the terminal base into the adjacent modules.
Forcing the units together can bend or break the hook and allow
the units to separate and break communication over the
backplane.
Publication
1797-5.1 - June 2010
Page 12
12 FLEX Ex Terminal Base Units
41108
Press down on the terminal base to lock it 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.
41109
Gently push the flexbus connector into the side of the adapter (or proceeding terminal
base) to complete the backplane connection.
5. 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.
Use caution to make sure that the female flexbus connector
does not strike any of the pins in the mating male connector.
6. For specific wiring information, refer to the installation instructions
for the module you are installing in the terminal base.
7. Repeat the above steps to install the next terminal base.
8. Be sure the flexbus connector cover on the last terminal base is in
place.
Publication
1797-5.1 - June 2010
Page 13
Mounting Dimensions
ATTENTION
41341
94
(3.7)
69
(2.7)
94
(3.7)
mm (in.)
The DIN rail or mounting bracket must be appropriately
connected to the dedicated intrinsic safety ground.
FLEX Ex Terminal Base Units 13
Publication
1797-5.1 - June 2010
Page 14
14 FLEX Ex Terminal Base Units
1
3
2
4
+V
+
V
-V
-V
50
(2.0)
.21 (0.83)
35.5
(1.4)
71.5
(2.8)
35.5
(1.4)
58.5
(2.3)
35.5
(1.4)
40.5
(1.6)
.15.6
(0.61)
.3
(8)
Cable length
approximately
292.1 (11.5) or
901.0 (35.5) from
upper connector
[length depends
upon cable
-0.3 m (1 ft ) or
0.91 m (3 ft ).
mm (In.
40871
Publication
1797-5.1 - June 2010
Page 15
FLEX Ex Terminal Base Units 15
1794-NM1 Mounting Kit with
18 screws (2 screws for the
adapter and 2 screws for
each module).
30238
About the Mounting Kit
Use the optional 1794-NM1 mounting kit to mount your system on a panel or
wall without a DIN rail.
Repair
The terminal bases are not field-repairable. Any attempt to open the terminal
bases will void the warranty and the IS certification. If repair is necessary,
return the module to the manufacturer.
Publication
1797-5.1 - June 2010
Page 16
16 FLEX Ex Terminal Base Units
Specifications - 1797-TB3 and 1797-TB3S Terminal Base Units
Number of Terminals 1 row of 16, 2 rows of 18
1797-TB3 Terminal Screw Torque 0.8…1.0 Nm (7…9 lb-in)
1797-TB3S Terminal Type Spring-clamp - To open, insert bladed screwdriver
Terminals Assignments
+34, -35, +50, -51, and 96
PiniFemale I/O Connector
Pinsi30…32, 62…64, 94…96,
36, 49
All Other Terminals
Flexbus Connection
Intrinsically
Isolation Voltage Channel-to-channel isolation determined by inserted
Weight 200 g (approximately)
Dimensions (With Module Installed
in Base) Metric
Environmental Conditions
Operational Temperature
Storage Temperature
Relative Humidity 5…95% noncondensing
ShockOperating Tested 15 g peak acceleration, 11 (±1) ms pulse width
Vibration Tested 2 g @ 10…500 Hz per IEC 68-2-6
Conductors Wire Size
Safe
Nonoperating Tested 15 g peak acceleration, 11 (±1) ms pulse width
1
Imperial
(2.54-3.05 mm/0.100-0.120 in.) and lift up.
Only for intrinsically safe circuits
Ui<10V dc
Ii<2.5 A
Ci< 1 nF
LiNegligible
Must not be used for any connection
Ui<30V dc
Ii<100 mA
Ci<1 nF
LiNegligible
Ui<10V dc
Ii<400 mA
Ci<1 nF
LiNegligible
module
3.7H x 3.7W x 2.7D mm
(94H x 94W x 69D in.)
-20…70 oC (-4…158 oF)
-40…85 oC (-40…185 oF)
4 mm2 (12 gauge) stranded max
1.2 mm (3/64 in.) insulation max
Publication
1797-5.1 - June 2010
Page 17
1797-TB3 and -TB3S Specifications Continued
Class I Division 1 Hazardous
FM
Agency Certification
IECEx Ex ia IIC T4
CENELEC II 2G Ex ia IIC T4
UL, C-UL Class I, Groups A, B, C and D; Class II, Groups E, F and
G; Class III Hazardous Locations.
Class I, Zone 1, AEx ib[ia] IIC T4.
FM Intrinsically safe Class I, Div 1, Groups A, B, C, D, T4.
Associated Apparatus with intrinsically safe
Connection Class I, II, III, Div 1, Groups A--G
Intrinsically safe Class I, Zone 1, AEx ib[ia] IIC T4.
INMETRO BR-Ex ia IIC T4
Certificates
IECEx BVS 08.0006X
CENELEC DMT 98 ATEX E012 U
UL, C-UL UL File Numer E197983
FM FM Certificate Number 3009806
INMETRO 05/UL-BRAE-0019U
FLEX Ex Terminal Base Units 17
1 Termination connections are unique with each I/O module. Refer to the appropriate I/O module’s
installation instructions.
Publication
1797-5.1 - June 2010
Page 18
18 FLEX Ex Terminal Base Units
IMPORTANT
UL, C-UL Certification
For detailed certification information, refer to the FLEX Ex
System Certification Reference Manual, publication
1797-6.5.6.
If these products have the UL/C-UL mark, they have been designed,
evaluated, tested, and certified to meet the following standards:
UL 913, 1988, Intrinsically Safe Apparatus and Associated Apparatus
for Use in Class I, II, and III Division 1, Hazardous (Classified)
Locations
UL 1203, Explosion-Proof and Dust-Ignition-Proof Electrical
Equipment for Use in Hazardous (Classified) Locations
UL 2279, Electrical Equipment for Use in Class I, Zone 0, 1, and 2
Hazardous (Classified) Locations
UL 61010, UL Standard for Safety Electrical Equipment For
Measurement, Control, and Laboratory Use; Part 1: General
Requirements
CSA C22.2 No. 157-92, Intrinsically Safe and Non-Incendive
Equipment for Use in Hazardous Locations
CSA C22.2 No. 30-M1986, Explosion-Proof Enclosures for Use in
Class I Hazardous Locations
CSA-E79-0-95, Electrical Apparatus for Explosive Gas Atmospheres,
Part 0: General Requirements
CSA-E79-11-95, Electrical Apparatus for Explosive Gas
Atmospheres, Part 11: Intrinsic Safety “i”
CSA C22.2 No. 14-95, Industrial Control Equipment
Publication
1797-5.1 - June 2010
Page 19
FLEX Ex Terminal Base Units 19
IMPORTANT
WARNING Avoid electrostatic charging.
ADVERTÊNCIA! PREVENIR CONTRA O ACÚMULO
DE CARGA ELETROSTÁTICA.
FM Certification
If these products have the FM mark, they have been designed, evaluated,
tested, and certified to meet the following standards:
FM C1. No.3600:1998, Electrical Equipment for Use in Hazardous
(Classified) Locations General Requirements
FM C1. No.3610:1999, Intrinsically Safe Apparatus and Associated
Apparatus for Use in Class I, II, III Division 1 Hazardous (Classified)
Locations
FM C1. No.3615:1989, Explosionproof Electrical Equipment General
Requirements
FM C1. No.3810:1989, 1995, Electrical and Electronic Test,
Measuring and Process Control Equipment
ANSI/NEMA 250, 1991, Enclosures for Electrical Equipment
For detailed certification information, refer to the FLEX
Ex System Certification Reference Manual, publication
1797-6.5.6.
FLEX Ex is a trademark of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
Publication
1797-5.1 - June 2010
Page 20
Rockwell Automation Support
Rockwell Automation provides technical information on the Web to assist you in using
its products. At http://support.rockwellautomation.com
manuals, a knowledge base of FAQs, 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://support.rockwellautomation.com
.
Installation Assistance
If you experience a problem with a hardware module 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 module up
and running.
United States 1.440.646.3434 Monday – Friday, 8am – 5pm EST
Outside United States Please contact your local Rockwell Automation representative for
any technical support issues.
New Product Satisfaction Return
Rockwell 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, it may
need to be returned.
United States Contact your distributor. You must provide a Customer Support case
number (see phone number above to obtain one) to your distributor
in order to complete the return process.
Outside United States Please contact your local Rockwell Automation representative for
return procedure.
Allen-Bradley, Rockwell Automation, ControlLogix, RSLinx, TechConnect, and FLEX I/O are trademarks of
Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
, you can find technical
Publication 1797-5.1 - June 2010 PN -79483
Supersedes Publication 1797-5.1 - February 2006 Copyright © 2010 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
Loading...