Rockwell Automation 1797-IE8NF User Manual

Installation Instructions

FLEX Ex 8 Input Analog, HART, and Noise Filter
Analog Modules

Catalog Numbers 1797-IE8, 1797-IE8H, 1797-IE8NF

Top ic Page

Important User Information 3
Environment and Enclosure 4
Prevent Electrostatic Discharge 5
Removal and Insertion Under Power 5
EMC Directive 6
Installation in Zone 1 7
Installation in Zone 22 7
Install the Module 8
Wire the Module to a 1797-TB3 or 1797-TB3S Terminal Base Unit 10
Ground the Module 12
Inputs 12
1797-IE8 and 1797-IE8NF Input Map (Read Words) 16
1797-IE8H Input Map (Read Words) 17
1797-IE8H Input Map (Read Words) 18
1797-IE8 and 1797-IE8NF Output Map (Write Words) 19
1797-IE8H Output Configuration Map 19
Fault Mode - Write Words 0 and 1 22
“Add-on” Filter Selections - Write Words 0 and 1 or Filter Cutoff Selections 22

2 FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules

Top ic Pa ge

Remote Transmitter Error Up/Down - Write Words 0 and 1 22
Data Format - Write Words 0 and 1 22
Data Format - Write Words 2 and 3 23
Error Level 0.1 mA Steps 24
1797-IE8H Secondary Master Enable (SME)/ Primary Master Inhibit (PMI) 25
Byte Order Configuration 26
Digital Filter 26
HART Input Data 30
HART Input Data Descriptions 34
HART Read Back Threshold 35
Square Root Threshold 35
Field Descriptions 27
Repair 36
Status Indicators 36
Specifications 37
Entity Parameters 41

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FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules 3

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

http://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, when necessary, we use notes to make you aware of safety considerations.

SGI-1.1 available from your local Rockwell Automation sales office or online at

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.

Labels may be located on or inside the equipment (for example, drive or motor) to alert
people that dangerous voltage may be present.

Labels may be located on or inside the equipment (for example, drive or motor) to alert
people that surfaces may be dangerous temperatures.

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4 FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules

ATTENTION

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 considered Group 1, Class A industrial equipment according
to IEC/CISPR 11. Without appropriate precautions, there may be difficulties with
electromagnetic compatibility in residential and other environments due to
conducted and radiated disturbances.
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, V2, V1, V0 (or equivalent) if
non-metallic. 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:

• Industrial Automation Wiring and Grounding Guidelines, for additional

installation requirements, Allen-Bradley publication 1770-4.1

• NEMA Standards 250 and IEC 60529, as applicable, for explanations of

the degrees of protection provided by different types of enclosure.

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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FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules 5

ATTENTION

WARNING

Prevent 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.

• Use a static-safe workstation, if available.

• Store the equipment in appropriate static-safe packaging when not in

use.

• Post a sign near these modules:

Attention! Avoid electrostatic charging.
ATENÇÃO! PREVENIR CONTRA O ACÚMULO DE CARGA

For your convenience, a sign that can be cut out and posted is included
in this publication.

ELETROSTÁTICA

Removal and Insertion Under Power

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.

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6 FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules

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

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

• 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'

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FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules 7

WARNING

Installation in Zone 1

These modules must not be exposed to the environment. Provide a suitable
metal enclosure. This module has a protection factor of IP20.

These modules cannot be used in an intrinsically safe
environment after they have been exposed to non-intrinsically
safe signals.

Installation in Zone 22

When the module is installed in Zone 22, the following cabinets must be used:
IVK2-ISRPI-V16LC; IVK2-ISRPI-V8HYW; or IVK2-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

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 year

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8 FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules

ATTENTION

ATTENTION

4

3

7

1

8

2

6

5

Label here or under here

40231

Install the Module

Read this for information about how to install the module which must be
used with a 1797-TB3 or 1797-TB3S intrinsically safe terminal base unit.

This equipmment is considered Group 1, Class A industrial equipement

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 accessiblity 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 infromation regarding specific enclosure type ratings

that are required to comply with certain productsafety certifications.

During mounting of all devices, be sure that all debris (such as metal chips or

wire strands) is kept from falling into the module. Debris that falls into the

module could cause damage on power up.

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FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules 9

ATTENTION

IMPORTANT

IMPORTANT

IMPORTANT

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.

To install the module on a 1797 terminal base, see the figure and complete the
following.

1. Rotate keyswitch (1) on terminal base unit (2) clockwise to position 3
(1797-IE8 and 1797-IE8NF) or position 8 (1797-IE8H) as required
for the particular 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
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,
noting that the module is seated when the latching mechanism (7) is
locked into the module.

6. Remove cap plug (8) and attach another intrinsically safe terminal base
unit to the right of this terminal base unit if required.

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.

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10 FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules

WARNING

41307

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

2

8

29 30 31 32 33

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Row A

Row B

Row C

+- +-+- +-

+-+-+-+-

Ch 0 Ch 1 Ch 2 Ch 3

Ch 7Ch 6Ch 5Ch 4

+V

-V +V

-V

40071

sig sig sig sig

sigsigsigsig

No connections allowed to terminals 16, 33, 36, 40, 41, 42, 43, 44, 45, and 49.

Wire the Module to a 1797-TB3 or 1797-TB3S Terminal Base Unit

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.

Module Wiring

1. Connect the individual input wiring to (+) terminals (0, 4, 8, 12) on
the 0…15 row (A) and on the 16…33 row (B) (terminals 17, 21, 25,

29) as indicated in the table,

Wire Connections on page 11.

2. Connect the associated input to the corresponding (sig) terminal (1, 5,
9, 13) on the 0…15 row (A), and on the 16…33 row (B) (terminals 18,
22, 26, 30) for each input as indicated in the table,

on page 11.

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Wire Connections

FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules 11

WARNING

ATTENTION

3. For other configurations, see the wiring diagrams in the section,

Inputs on page 12.

4. Connect +V DC power to terminal 34 on the 34…51 row (C).

5. Connect -V to terminal 35 on the 34…51 row (C).

Make certain that you power these modules with an intrinsically safe power
supply. Do not exceed the values listed in the specifications for these modules.
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.

6. 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.

7. 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.

To reduce susceptibility to noise, power analog modules and digital modules
from separate power supplies.

Wire Connections

Input Input

Source

Input 0 A-0 A-1 A-2 Input 4 B-17 B-18 B-19
Input 1 A-4 A-5 A-6 Input 5 B-21 B-22 B-23
Input 2 A-8 A-9 A-10 Input 6 B-25 B-26 B-27
Input 3 A-12 A-13 A-14 Input 7 B-29 B-30 B-31
+V Terminals 34 and 50

-V Terminals 35 and 51

Input
Signal

Input
Return

Input Input

Source

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Input
Signal

1797-5.5 - September 2011

Input
Return

12 FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules

ATTENTION

IMPORTANT

44862

Do not use the unused terminals on this terminal base unit. Using these
terminals as supporting terminals can result in damage to the module, or
unintended operation of your system, or both.

Ground the Module

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.

Inputs

Each input can be operated from an analog field device signal. Do not apply
any nonintrinsically safe signals to these modules.

When using an intrinsically safe electrical apparatus according to EN50020,
the European Community directives and regulations must be followed.

The channels in these modules are electrically connected to each other and
have a common plus-line.

Publication

When interconnecting several lines, you must consider the total
accumulated power and check for intrinsic safety.

1797-5.5 - September 2011

FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules 13

Flexbus

Bus

uC

+V

-V

+

Sig

4…20 mA
Xmit

4…20 mA
Xmit

I

P

P

I

40072

22 Ω

273 Ω

21.5V

-

P

I

Isolated
Power
4…20 mA
Xmit

1797-IE8 and
1797-IE8NF

Flexbus

Bus

uC

+V

-V

+

Sig

4…20 mA
Xmit

4…20 mA
Xmit

I

P

P

I

43852

10 Ω

-

1797-IE8H

HART

Modem

273 Ω

23.7V

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14 FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules

Voltage

mA

16
14
12
10
8

6
4

0 5 10 15 20 25

43002

2
0

18

20

22

V DC

1797-IE8 and 1797-IE8NF Field Transmitter Supply Characteristic

The field transmitter supply can be modeled as a 21.5V source with a 273 Ω
series resistance. (See the following graph.) This provides a simple and useful
mechanism to determine transmitter and loop compatibility.

The actual transmitter supply contains three ranges of impedance with the
following characteristics:

• The output voltage is ≈ 21.5V for load currents of 0 mA.

• If the load is more than ≈ 680 Ω but less than ∞Ω, the transmitter
supply is in a constant resistance region (≈ 273 Ω).

• For load impedance between 0 and ≈ 680 Ω, the transmitter supply

current is in constant current mode (≈ 22 mA).

If an intrinsic safety fault occurs in the field transmitter supply of any channel,
every channel’s field transmitter power is shutdown.

The following graph depicts the typical transmitter load characteristic.

The normal module field side power consumption is 7.5 W when all channel

21.5V sources (+) are loaded. If field devices are used that are powered
separately, the module field-side power consumption can be determined by
Field_Side_Power = 9.5V x (300 mA + n x 55 mA). Where n is the number of
field devices that are supplied by the 1797-IE8 or 1797-IE8NF.

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FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules 15

Voltage

mA

17

04 812 2024

43850

0

24
23

16
15
14

3
2
1

16

V DC

1797-IE8H Field Transmitter Supply Characteristic

The field transmitter supply can be modeled as a 23.7V source with a 273 Ω
series resistance. (See the following graph.) This provides a simple and useful
mechanism to determine transmitter and loop compatibility.

The actual transmitter supply contains three ranges of impedance with the
following characteristics:

• The output voltage is ≈ 23.7V for load currents of 0 mA.

• If the load is more than ≈ 750 Ω but less than ∞Ω, the transmitter

supply is in a constant resistance region (

• For load impedance between 0 and ≈ 750 Ω, the transmitter supply
current is controlled by the field device to a maximum of

If an intrinsic safety fault occurs in the field transmitter supply of any channel,
every channel’s field transmitter power is shutdown.

The following graph depicts the typical transmitter load characteristic.

≈ 273 Ω).

≈ 22 mA.

The normal module field side power consumption is 7.1 W when all channel

23.7V sources (+) are loaded. If field devices are used that are powered
separately, the module field-side power consumption can be determined by
Field_Side_Power = 9.5V x (180 mA + n x 69 mA). Where n is the number of
field devices that are supplied by the 1797-IE8H.

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16 FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules

1797-IE8 and 1797-IE8NF Input Map (Read Words)

Bit

Word 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 Channel 0 Input Data
1 Channel 1 Input Data
2 Channel 2 Input Data
3 Channel 3 Input Data
4 Channel 4 Input Data
5 Channel 5 Input Data
6 Channel 6 Input Data
7 Channel 7 Input Data
8OA

9RF

10 Diagnostic Status
11 Res

Where: Ch = channel

OA

OA

OA

OA

OA

OA

OA

UA

UA

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

Ch0

Ch7

Ch6

RF

RF

RF

RF

RF

RF

RF

LF

LF

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

Ch0

Ch7

Ch6

Module command response Module response data

Flg

OA = Over Alarm
UA = Under Alarm
RF = Remote Fault
LF = Local Fault
Res Flg = Response Flag

UA
Ch5

LF
Ch5

UA
Ch4

LF
Ch4

UA
Ch3

LF
Ch3

UA
Ch2

LF
Ch2

UA
Ch1

LF
Ch1

UA
Ch0

LF
Ch0

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