Allen-Bradley FLEX Ex 1797-OB4D User manual

Publication1797-5.6 - December 2003
Installation Instructions
FLEX Ex 24V dc Non-Isolated Source 4 Output
Module
(Cat. No. 1797-OB4D)
Important User Information
Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application, Installation and
Maintenance of Solid State Controls (Publication SGI-1.1 available from your local Rockwell
Automation sales office or online at http://www.ab.com/manuals/gi) describes some
important differences between solid state equipment and hard-wired electromechanical
devices. Because of this difference, and also because of the wide variety of uses for solid
state equipment, all persons responsible for applying this equipment must satisfy
themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or
consequential damages resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes.
Because of the many variables and requirements associated with any particular installation,
Rockwell Automation, Inc. cannot assume responsibility or liability foractual 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.
AB Parts

2FLEX Ex 24V dc Non-Isolated Source 4 Output Module
Publication1797-5.6 - December 2003
WARNING Identifies information aboutpracticesor circumstancesthat can cause an explosion in a
hazardous environment, which may lead to personal injury or death, property damage, or
economic loss.
IMPORTANT Identifies information that is critical for successful application and understanding of the
product.
ATTENTION Identifiesinformationaboutpracticesorcircumstancesthatcanleadtopersonalinjuryor
death, property damage, or economic loss. Attentions help you:
•identify a hazard
•avoid a hazard
•recognize the consequence
S
HOCK HAZARD Labels may be located on or inside the drive to alert people that dangerous voltage may
be present.
BURN HAZARD Labels maybe locatedon or inside the drive to alert people that surfaces may be
dangerous temperatures.
Important User Information
1
2
3
45
6
7
Label here or
under here.
8
40231

FLEX Ex 24V dc Non-Isolated Source 4 Output Module 3
Publication 1797-5.6 - December 2003
Module Installation
This module must be used with a 1797-TB3 or -TB3S intrinsically safe
terminal base unit.
1. Rotate keyswitch (1) on terminal base unit (2) clockwise to position 7
as required for this type of module. Do not change the position of
the keyswitch after wiring the terminal base unit
2. Make certain the flexbus connector (3) is pushed all the way to the left
to connect with the neighboring terminal base/adapter. You cannot
install the module unless the connector is fully extended.
3. Make sure the pins on the bottom of the module are straight so they
will align properly with the connector in the terminal base unit.
4. Position the module (4) with its alignment bar (5) aligned with the
groove (6) on the terminal base.
5. Press firmly and evenly to seat the module in the terminal base unit.
The module is seated when the latching mechanism (7) is locked into
the module.
ATTENTIO
N
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.
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4FLEX Ex 24V dc Non-Isolated Source 4 Output Module
Publication1797-5.6 - December 2003
6. Make certain that you only connect terminal base units to other
intrinsically safe system modules or adapters to maintain the integrity
of the intrinsically-safe backplane.
7. Remove cap plug (8) and attach another intrinsically safe terminal base
unit to the right of this terminal base unit if required.
Installation in Zone 1
This module must not be exposed to the environment. Provide a suitable
metal enclosure. This module has a protection factor of IP20.
Installation on Zone 22
When the module is 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
Konigsberger Allee 85-87, D-68307
Mannheim, Germany
Attn: PA Sales Dept.
Kirsten Becker
Telephone [phone]
www.pepperl-fuchs.com
WARNING This module cannot be used in an intrinsically safe environment
after it has been exposed to non-intrinsically safe signals.
41307

FLEX Ex 24V dc Non-Isolated Source 4 Output Module 5
Publication 1797-5.6 - December 2003
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 IS-RPI 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
68301 Mannheim
IVK2-ISRPI-V8LC (or IVK2-ISRPI-V8HYW or
IVK2-ISRPI-V16LC)
II 3D IP54 T 70°C
CE
Serial (manufacturing) number
Model
Electrostatic Charge
Protect the system against electrostatic charge. Post a sign near this module:
Attention! Avoid electrostatic charge. For your convenience, a sign which
can be cut out is included in this installation instruction.
Removal and Insertion Under Power
WARNING These modules are designed so you can remove and insert
them under power. However, take special care when removing
or inserting modules in an active process. I/O attached to any
module being removed or inserted can change states due to its
input/output signal changing conditions.
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. AB Parts

6FLEX Ex 24V dc Non-Isolated Source 4 Output Module
Publication1797-5.6 - December 2003
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 89/336/EEC
Electromagnetic Compatibility (EMC) as amended by 92/31/EC and
93/68/EEC, by applying the following standards:
•EN 61000-6-4:2001, Electromagnetic Compatibility (EMC) - Part 6-4:
Generic Standard for Industrial Environments (Class A)
•EN 61000-6-2:2001, Electromagnetic Compatibility (EMC) - Part 6-2:
Generic Standards - Immunity for Industrial Environments
•EN61326-1997 + A1-A2, 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:
•EN50014:1997 + A1-A2, Electrical Apparatus for Potentially
Explosive Atmospheres
•EN50020:1994, Electrical Apparatus for Potentially Explosive
Atmospheres - Intrinsic Safety .i.
•EN50284:1999, Special Requirements for Construction, Test, and
Marking of Electrical Apparatus of Equipment Group II,
Category 1G
•EN50281-1-1:1998 + A1, Electrical Apparatus for Use in the
Presence of Combustible Dust - Part 1-1: Protection by Enclosure

FLEX Ex 24V dc Non-Isolated Source 4 Output Module 7
Publication 1797-5.6 - December 2003
Outputs
Each output can operate a discrete field device.
Do not apply any non-intrinsically safe signals to this module.
When using an intrinsically safe electrical apparatus according to EN50020,
the European Community directives and regulations must be followed.
The channels in this module are electrically connected to each other.
Wiring to a 1797-TB3 or -TB3S Terminal Base Unit
Connect wiring to the terminal base as shown below.
1. Connect the individual output wiring to (+) terminals (0, 4, 8, 12) on
the 0-15 row (A) as indicated in the table below.
flexbus bus
uC
+V
-V
+
-
power
supply
valve audible
alarm solenoid
40069
40068
Row A
Row B
Row C
++++--- -
ch0 ch1 ch2 ch3
+V +V-V -V
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
No connections allowed to terminals 2, 3, 6, 7, 10, 11, 14, 15, 17 to 32, 36, 37, 38, 39,
46, 47, 48, 49
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
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8FLEX Ex 24V dc Non-Isolated Source 4 Output Module
Publication1797-5.6 - December 2003
2. Connect the associated output to the corresponding (-) terminal (1, 5,
9, 13) on the 0-15 row (A) for each output as indicated in the table
below.
3. Connect +V dc power to terminal 34 on the 34-51 row (C).
4. Connect -V to terminal 35 on the 34-51 row (C).
5. If continuing power to the next terminal base unit, connect a jumper
from terminal 50 (+V) on this base unit to terminal 34 on the next
base unit.
6. If continuing common to the next terminal base unit, connect a
jumper from terminal 51 (-V) on this base unit to terminal 35 on the
next base unit.
WARNING Make certain that you power this module with an intrinsically
safe power supply. Do not exceed the values listed in the
specifications for 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.

FLEX Ex 24V dc Non-Isolated Source 4 Output Module 9
Publication 1797-5.6 - December 2003
Wiring
Grounding
All I/O wiring must use shielded wire. Shields must be terminated external to
the module, such as bus bars and shield-terminating feed throughs.
Output Output + Output -
Output 0 A-0 A-1
Output 1 A-4 A-5
Output 2 A-8 A-9
Output 3 A-12 A-13
+V C-34 and C-50
-V C-35 and C-51
ATTENTION Do not use the unused terminals on this terminal base
unit. Using these terminals as supporting terminals
can result in damage to the module and/or
unintended operation of your system.
30820-M
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10 FLEX Ex 24V dc Non-Isolated Source 4 Output Module
Publication1797-5.6 - December 2003
Indicators
A = Status Indicators - yellow - individual input present; flashing red -
channel fault; solid red - module did not pass powerup check; Channel
0 - solid red while power up check is running
B = Insertable labels for writing individual input designations
C = Power Indicator - green indicates power applied to module
Memory Mapping
Dec
Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Oct.
Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
Read
0OVL 3OVL 2OVL 1OVL 0F3 F2 F1 F0
Write
0Out Enb L FM 3FM 2FM 1 FM 0 FS 3 FS 2 FS 1 FS 0 03 02 01 00
Write
1FR Alarm Filter - Ch 0-3
Ex
1797-OB4D
PWR
ABC40067