Installation Instructions
FLEX Ex Bus Isolator and Flexbus Connector
Catalog Numbers 1797-BIC, 1797-CEC
Top ic Page
Important User Information 2
About the Isolator and Flexbus Connector 3
Product Features 4
Intermixed Systems 4
Module Installation 5
Installation in Zone 2 10
Installation in Zone 22 10
Electrostatic Charge 11
Removal and Insertion Under Power 11
European Communities (EC) Directive Compliance 12
Inputs and Outputs 15
Wire the Isolator Module 16
Indicators 17
About the Mounting Kit 17
Specifications 20
Publication 1797-5.13 - June 2010
2 FLEX Ex Bus Isolator and Flexbus Connector
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://www.literature.rockwellautomation.com) 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, and recognize the consequences.
Publication
Labels may be on or inside the equipment to alert people that dangerous voltage may be
present.
Labels may be on or inside the equipment to alert people that surfaces may reach
dangerous temperatures.
1797-5.13 - June 2010
FLEX Ex Bus Isolator and Flexbus Connector 3
QUALITY
B-A
Allen-Bradley
1797 - CEC
FLEXBUS
CONNECTOR
12 4
3
+V -V +V -V
1797 - BIC
PWR
QUALITY
B-A
Allen-Bradley
FLEXBUS
ISOLATOR
42641
1
2
3
4
5
6
7
8
2
3
1797-CEC 1797-BIC
About the Isolator and Flexbus Connector
Use the FLEX Ex bus isolator to interconnect standard FLEX I/O modules
to intrinsically-safe FLEX Ex modules in the same I/O group
Component Identification
1 Power indicators
2 Label
3 Module locking tab
4 Removable power connector
5 FLEX Ex backplane connector
6 FLEX Ex backplane connector cover
7 Master backplane connector
8 FLEX I/O backplane connector
Publication
1797-5.13 - June 2010
4 FLEX Ex Bus Isolator and Flexbus Connector
Mix Systems in the Safe Area
Any Communication
Adapter Supported by
FLEX I/O system
Bus Isolator
1797-CEC
1797-BIC
FLEX I/O system
Nonhazardous Area
or
Zone 2
Hazardous Area
Zone 1
1794-CE3
FLEX Ex system
Max of
1 m (3.28 ft)
Field Wiring to
Zone 0
40087
Product Features
Provides an IS-compatible mechanism to separate two sections of the
backplane allowing IS and non-IS field-device wiring to the same I/O
group.
Converts hazardous power to IS-safe power to run one side of the bus
receiver/transmitter circuitry and IS-safe FLEX Ex backplane power
to slave side modules.
Allows up to eight FLEX Ex modules may be attached to the slave
side.
Intermixed Systems
The bus isolator modules, 1797-BIC and 1797-CEC, let you configure FLEX
Ex modules and FLEX I/O modules on the DIN rail when attached to the
same adapter and grouped together on appropriate sides of the bus isolator
module. This highly flexible, cost-effective solution combines intrinsically safe
and nonintrinsically safe systems.
Intermixed systems can be configured for use in the:
safe area much like traditional IS and I/O systems.
hazardous and safe control equipment where the distance of physical
separation is short.
FLEX Ex I/O with communication adapters that are not intrinsically
safe.
.
..
.
.
.
1
.
.
..
.
.
.
.
.
Publication
1797-5.13 - June 2010
.
.
..
..
.
.
.
.
.
.
.
.
..
.
.
.
.
.
.
.
FLEX Ex Bus Isolator and Flexbus Connector 5
ATTENTION
ATTENTION
1794
Adapter
1797
CEC
1797
BIC
1797 I/O
& Base
1797 I/O
& Base
1797 I/O
& Base
1797 I/O
& Base
1797
Power
Supply
24V dc
Power
Supply
42754
Module Installation
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.
These products are grounded through the DIN rail to the dedicated
intrinsic safety ground. Use zinc plated yellow-chromate 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.
Make certain that you only connect the FLEX Ex backplane connector to
other intrinsically-safe system modules to maintain the integrity of the
intrinsically-safe backplane.
For proper operation, cycle power to the 1797-BIC module at the
same time power is cycled to the associated adapter.
Publication
1797-5.13 - June 2010
6 FLEX Ex Bus Isolator and Flexbus Connector
42642
A
A
41377
1797-CEC Module Installation
The 1797-CEC module mounts on a DIN rail. It connects to an adapter or
another FLEX I/O module. If using this module with FLEX I/O modules,
do not mount between FLEX I/O modules. Mount the 1797-CEC module to
the right of FLEX I/O modules. Follow these steps to mount this module.
1. Remove the cover plug (if used) in the male connector of the unit to
which you are connecting this module.
2. Position the module on the 35 x 7.5 mm DIN rail A (A-B pt. no.
199-DR1).
3. Rotate the module onto the DIN rail with the top of the rail hooked
under the lip on the rear of the module.
1797-CEC
4. Press down to lock the module on the DIN rail.
Publication
1797-5.13 - June 2010
FLEX Ex Bus Isolator and Flexbus Connector 7
42643
1797-CEC
42644
If the module does not lock in place, use a screwdriver or similar
device to move the locking tab down, press the module flush with the
DIN rail and release the locking tab to lock the module in place.
5. Firmly push the module into the adjacent module or terminal base
until the units lock together.
1797-CEC
6. To remove the 1797-CEC module, you must work from the right side
and remove one module at a time. To disengage a module from its
neighbor, place a common, flat-bladed screwdriver between the two
modules and turn 1/4 turn to separate the modules.
7. Then slide the module away from its left neighbor, and release the
locking lever to remove the module from the DIN rail.
Publication
1797-5.13 - June 2010
8 FLEX Ex Bus Isolator and Flexbus Connector
42645
A
A
1797-CEC
1
3
2
4
+V
+V
-V
-V
PWR
FLEXBUS
ISOLATOR
1797-BIC
42646
Install the 1797-BIC Module
The 1797-BIC module mounts on a DIN rail. It connects to a 1797-CEC
module.
1. Remove the cover plug (if used) in the male connector of the unit to
which you are connecting this module.
2. Position the module on the 35 x 7.5 mm DIN rail A (A-B pt. no.
199-DR1).
3. Rotate the module onto the DIN rail with the top of the rail hooked
under the lip on the rear of the module.
1797-CEC
+V
-V
+V
1
2
3
4
1797-BIC
FLEXBUS
ISOLATOR
PWR
-V
4. Press down to lock the module on the DIN rail.
If the module does not lock in place, use a screwdriver or similar
device to move the locking tab down, press the module flush with the
DIN rail, and release the locking tab to lock the module in place.
Publication
1797-5.13 - June 2010
FLEX Ex Bus Isolator and Flexbus Connector 9
WARNING
1797-CEC
1
3
2
4
+V
+V
-V
-V
PWR
FLEXBUS
ISOLATOR
1797-BIC
42647
5. Firmly push the module into the adjacent module/terminal base until
the units interconnect.
6. Install DIN rail locks (supplied with the 1797-BIC module) to meet
shock and vibration specifications as listed on page 20.
7. To remove the 1797-BIC module, remove the DIN-rail locks and then
slide the module away from its left neighbor, and release the locking
lever to remove the module from the DIN rail.
Do not remove the 1797-CEC or 1797-BIC modules under power.
Removing these modules under power will break the electrical
backplane (flexbus) connections. This can cause personal injury or
property damage by:
sending an erroneous signal to your system’s field devices
causing unintended machine motion.
causing an explosion in a hazardous environment.
breaking communication to modules beyond this module.
Publication
1797-5.13 - June 2010
10 FLEX Ex Bus Isolator and Flexbus Connector
WARNING
Installation in Zone 2
The 1797-CEC and 1797-BIC modules must not be exposed to the
environment. These modules have a protection factor of IP20. Provide a
suitable metal enclosure.
The 1797-BIC module cannot be used as an associated apparatus
after its FLEX Ex backplane connector has been exposed to
nonintrinsically safe signals.
Installation in Zone 22
When the modules 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 X
CE
Serial (manufacturing) number
Model
Publication
1797-5.13 - June 2010
FLEX Ex Bus Isolator and Flexbus Connector 11
WARNING
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 is included in this installation
instruction.
Removal and Insertion Under Power
Do not remove the 1797-CEC or 1797-BIC modules under power.
Removing these modules under power will break the electrical
backplane (flexbus) connections. This can cause personal injury or
property damage by:
sending an erroneous signal to your system’s field devices
causing unintended machine motion.
causing an explosion in a hazardous environment.
breaking communication to modules beyond this module.
Publication
1797-5.13 - June 2010
12 FLEX Ex Bus Isolator and Flexbus Connector
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
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
The 1797-BIC module is tested 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
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'
Publication
1797-5.13 - June 2010
FLEX Ex Bus Isolator and Flexbus Connector 13
The 1797-CEC module is tested 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:
EN 60079-15:2005, Electrical Apparatus for Potentially Explosive
Atmospheres - Type of Protection “n”
FM Compliance
If this product has the FM mark, it has 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
USL Compliance
If this product has the UL mark, it has been designed, evaluated, tested, and
certified to meet the following standards:
UL 913, 5th Edition, Intrinsically Safe Apparatus and Associated
Apparatus for Use in Class I, II, III, Division 1, Hazardous
(Classified) Locations
UL 1604, 3rd Edition, Electrical Equipment for Use in Class I and II,
Division 2, and Class III Hazardous (Classified) Locations
UL 1203, 2nd Edition, Explosion-Proof and Dust-Ignition-Proof
Electrical
Equipment for Use inHazardous (Classified) Locations
UL 2279, 1st Edition, Electrical Equipment for Use Class I, Zone 0, 1,
and 2 Hazardous (Classified) Locations
Publication
1797-5.13 - June 2010
14 FLEX Ex Bus Isolator and Flexbus Connector
UL 508, 17th Edition, Standard for Industrial Control Equipment
Switches
Publication
1797-5.13 - June 2010
FLEX Ex Bus Isolator and Flexbus Connector 15
1797-CEC 1797-BIC
Flexbus FlexbusFlexbus
PWR
Limit
Bus
Bus
+V
-V
Standard
Power
Source
41693
FLEX Ex
Bus
IS Flexbus
IS Flexbus
CNL Compliance
If this product has the cUL mark, it has been designed, evaluated, tested, and
certified to meet the following standards:
CAN/CSA C22.2 No. 157-92, Intrinsically Safe and Non-Incendive
Equipment for Use in Hazardous Locations
CAN/CSA C22.2 No. 30-M1986, Explosion-Proof Enclosures for
Use in Class I Hazardous Locations
CAN/CSA E79-0-95, Electrical apparatus for explosive gas
atmospheres - Part 0: General requirements
CAN/CSA E79-11-95, Electrical apparatus for explosive gas
atmospheres - Part 11: Intrinsic safety "i"
CAN/CSA C22.2 No. 14-95, Industrial Control Equipment
CAN/CSA E79-15-95, Electrical apparatus for explosive gas
atmospheres - Part 15: Electrical Apparatus with Type of
Protection "n"
Inputs and Outputs
Do not apply any noninstrinsically safe signals to the FLEX Ex backplane
connector.
When using as an intrinsically safe electrical apparatus according to EN
60079-11, the European directives and regulations must be followed.
Publication
1797-5.13 - June 2010
16 FLEX Ex Bus Isolator and Flexbus Connector
ATTENTION
WARNING
42648
41297
Wire the Isolator Module
When connecting wiring, torque terminal screws to 0.8…1.0 Nm
(7…9 lb-in).
B-A
Allen-Bradley
QUALITY
3
12 4
+V -V +V -V
Make certain that you power this device with normal 24V dc. Do not
use an intrinsically-safe power supply, such as the 1797-PS2E or
1797-PS2N, to power this module.
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.
1. Apply +V and -V power (24V dc) to the adapter through a removable
terminal block.
1797 - BIC
FLEXBUS
ISOLATOR
POWER
+V -V +V -V
Screw terminals and spring terminals are provided.
Publication
1797-5.13 - June 2010
+V -V +V -V
FLEX Ex Bus Isolator and Flexbus Connector 17
ATTENTION
1794-NM1
Mounting Kit with
18 screws (2 screws for the
adapter and 2 screws for
each module).
30238
2. Strip the +V and -V wires to a length so no bare conductor shows
after inserting the wires into position (+V, -V).
3. If you are using the spring terminals of the plug, insert a screwdriver
into the slot and carefully pry until the spring clamp opens to accept
the wire.
4. Connect either a 1797-TB3 terminal base, a 1794-CE1 cable, or a
1794-CE3 cable onto the FLEX Ex backplane connector of the
1797-BIC module.
The FLEX Ex backplane connector cover must remain in place until a
FLEX Ex terminal base or cable is connected to the 1797-BIC module.
Indicators
The 1797-BIC isolator module provides a power indicator to show power has
been applied to the module.
About the Mounting Kit
Use the optional 1794-NM1 mounting kit to mount your system on a panel or
wall without a DIN rail.
Publication
1797-5.13 - June 2010
18 FLEX Ex Bus Isolator and Flexbus Connector
ATTENTION
42649
mm (in.)
75
(2.95)
87
(3.4)
94
(3.7)
Dimensions for Mounting the 1797-BIC Isolator Module
1797-BIC
FLEXBUS
ISOLATOR
+V
-V
+V
1
2
3
PWR
-V
4
The DIN rail or mounting bracket must be appropriately connected to
the dedicated intrinsic safety ground.
Repair
The 1797-BIC isolator module is not field-repairable. Any attempt to open
the module will void its warranty and the IS certification. If repair is necessary,
return the module to the manufacturer.
Publication
1797-5.13 - June 2010
FLEX Ex Bus Isolator and Flexbus Connector 19
ATTENTION
42650
mm (in.)
69
(2.72)
80
(3.15)
55
(2.17)
Dimensions for Mounting the 1797-CEC Flexbus Connector
1797-CEC
The DIN rail or mounting bracket must be appropriately connected to
the dedicated intrinsic safety ground.
Repair
The 1797-CEC Flexbus Connector module is not field-repairable. Any
attempt to open the module will void its warranty. If repair is necessary, return
the module to the manufacturer
Publication
1797-5.13 - June 2010
20 FLEX Ex Bus Isolator and Flexbus Connector
Specifications
Table 1 1797-BIC Flex Ex Bus Isolator
Attribute Valu e
I/O module capacity
Indicators Power - green when power is applied
Isolation path
Flexbus to Flexbus
Flexbus slave side
to power supply
Power consumption 18…32V dc @ 0.15 A
Power source failure
Max input
Power dissipation 2.1 W
Thermal dissipation 7.2 BTU/hr
IS module type [Ex ib] IIC
Conductor wire size
Weight Approx. 200 g
Environmental conditions
Operational temperature
Storage temperature -40…85 °C (-40…185 °F)
Relative humidity 5…95% noncondensing
Shock operating Tested 30 g peak acceleration, 11 (±1) ms pulse width
nonoperating Tested 30 g peak acceleration, 11 (±1) ms pulse width
Vibration Tested 5 g @ 10…500 Hz per IEC 68-2-6
Output (intrinsically safe)
(16 pin male flexbus
connector)
CENELEC
Output (intrinsically safe)
(16 pin male flexbus
connector)
FM and cULus
8 FLEX Ex modules
Galvanic to DIN EN 60079-11
Galvanic to DIN EN 60079-11
Um = 253V ac
4 mm2 (12 gauge) stranded max
1.2 mm (3/64 in.) insulation max
-20…70 °C (-4…158° F)
Uo< 5.75V dc
Io< 400 mA
Po< 2.05 W
Lo< 100 H
Co< 39 F
Vt< 5.75V dc
It< 398.25 mA
Ca< 39.67 F
La< 210 H
(1)
Publication
1797-5.13 - June 2010
FLEX Ex Bus Isolator and Flexbus Connector 21
Attribute Valu e
Agency certification Marking and classification
FM Nonincendive, use for Class I, Division 2 Groups A, B, C
and D. Provides Intrinsically safe outputs to Class I,
Division 1, Groups A, B, C and D when installed in
accordance with Control Drawing No. 1797-6.5.6
UL, C-UL Associated Apparatus, Class I, Division 2, Groups A, B,
C, and D Hazardous Locations; Class I, Zone 2,
AEx nA[ia] IIC, Ex nA[ia] IIC T4 (Ta = 70 °C) when
installed in accordance with Control Drawing No.
1797-6.5.6
INMETRO [BR-Ex ib] IIC
Approval marks and certification number
EXAM (ATEX)
DMT 00 ATEX E056
UL, C-UL
File No.: E197983
FM
INMETRO
IECEx
05/UL-BRAE-0010
IECEx BVS 09.0025
Declaration of conformity Marking
Directive 89/336/EEC (EMC)
Directive 94/9 EC (ATEX) II (2) G [Ex ib] IIC
II (2) D [Ex ibD]
II 3G Ex nA IIC T4 X
IECEx [Ex ib] IIC
IEC temp code T4
1 A total of eight I/O modules can be attached to a 1794 FLEX I/O adapter. The 1797-CEC and 1797-BIC
modules are not included in this number. In intermixed systems, the number of 1797 FLEX Ex I/O
modules (attached onto the 1797-BIC module) plus the number of 1794 FLEX I/O modules (connected
between the adapter and the 1797-CEC module) cannot exceed eight.
Publication
1797-5.13 - June 2010
22 FLEX Ex Bus Isolator and Flexbus Connector
Table 2 Flexbus Connector - 1797-CEC
Attribute Value
Indicators Not applicable
Weight Approx. 100 g
Environmental conditions
Operational temperature
Storage temperature
Relative humidity 5…95% noncondensing
Shock operating Tested 30 g peak acceleration, 11 (±1) ms pulse width
nonoperating Tested 30 g peak acceleration, 11 (±1) ms pulse width
Vibration Tested 5 g @ 10…500 Hz per IEC 68-2-6
Agency certification Marking and classification
UL, C-UL Class I, Division 2, Groups A, B, C, and D Hazardous
UL, C-UL
-20…70 oC (-4…158 oF)
-40…85 oC (-40…185 oF)
FM Nonincendive, use for Class I, Division 2 Groups A , B,
C, and D Hazardous Locations;. A temp rating of T4
applies with Ta = 70 °C.
Locations; Class I, Zone 2, AEx nA IIC, Ex nA IIC T4
(Ta = 70 °C)
Approval mark and certificate number
File No.: E197983
FM
Declaration of conformity Marking
Directive 89/336/EEC (EMC)
Directive 94/9 EC (ATEX) II 3G Ex nA IIC T4 X
Publication
1797-5.13 - June 2010
FLEX Ex Bus Isolator and Flexbus Connector 23
Nonhazardous or Hazardous
(Classified) Location
Class I, Zone 2, Group IIC or
Class I, Division 2, Groups A to D
Nonhazardous or Hazardous
(Classified) Location
Class I, Zone 1, Group IIC or
Class I, Division 1, Groups A to D
42876
.
.
Nonhazardous or Hazardous
(Classified) Location
Class I, Zone 2, Group IIC or
Class I, Division 2, Groups A to D
Nonhazardous or Hazardous
(Classified) Location
Class I, Zone 1, Group IIC or
Class I, Division 1, Groups A to D
42877
CENELEC Information
The isolator type 1797-BIC/* module is an associated apparatus according to
EN 60079-11. If the isolator is connected to intrinsically-safe circuits the
applicable national local construction, installation and operating regulations
must be heeded (in Germany DIN EN 60079-11, DIN VDE 0165).
UL Information
Diagram 1
Diagram 2
.
Publication
..
1797-5.13 - June 2010
24 FLEX Ex Bus Isolator and Flexbus Connector
IMPORTANT
Isolator Restriction
1797-BIC and -CEC Max of 8 I/O modules
I/O module capacitance value is cumulative. Ci (total) = Ci (I/O module
1) + Ci (I/O module 2) + ...Ci (I/O module 8). Ci (total) must be less than
F. The limitation of eight I/O modules per isolator is a functional
65
limitation. Refer to table 2 of the appropriate I/O Modules sections in this
document (1797-6.5.6).
Application
The isolator type 1797-BIC/* module functions as a galvanic isolation barrier
for signals between a nonintrinsic backplane bus and an intrinsic safe
backplane bus. The isolator must be installed in a safe or Zone 2 area.
Cover Plug for IS Backplane Bus
The 16-pole male connector for the FLEX Ex IS backplane bus is provided
with a cover plug. The cover plug can only be removed when a 1797-TB3
terminal base, a 1794-CE1 cable or a 1794-CE3 cable is connected. The
connection must not be connected to any signals that exceed the instrinsically
safe values of the IS backplane.
Power Supply
The isolator is powered via a removable terminal connector with a dc-voltage
between 18V and 32V. Due to a failure in the power supply a maximum
voltage U
of 253V ac is permitted.
m
Publication
For detailed certification information, refer to the FLEX Ex
System Certification Reference Manual, publication
1797-6.5.6.
1797-5.13 - June 2010
FLEX Ex Bus Isolator and Flexbus Connector 25
WARNING Avoid electrostatic charging.
ADVERTÊNCIA! PREVENIR CONTRA O ACÚMULO
DE CARGA ELETROSTÁTICA.
Publication
1797-5.13 - June 2010
26 FLEX Ex Bus Isolator and Flexbus Connector
Notes:
Publication
1797-5.13 - June 2010
Notes:
FLEX Ex Bus Isolator and Flexbus Connector 27
Publication
1797-5.13 - June 2010
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 1797-5.13 - June 2010 PN-79498
Supersedes Publication 1797-5.13 - February 2007 Copyright © 2010 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
Loading...