Installation Instructions
FLEX I/O 8 Output HART Analog Module
Catalog Number 1794-OE8H, Series B
Topic Page
Important User Information 2
European Hazardous Location Approval 6
Environment and Enclosure 3
Prevent Electrostatic Discharge 4
North American Hazardous Location Approval 5
About the Module 7
Install the Module 7
Wire the Module 9
Ground the Module 11
Input Map 12
Configuration Map 13
Cyclic HART Input Data 16
Configuration Map (Series A Mode) 22
Extended Configuration Data Table (Series A Mode) 23
Field Descriptions 24
Status Indicators 28
Specifications 29
2 FLEX I/O 8 Output HART Analog Module
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
available from your local Rockwell Automation sales office or online at
SGI-1.1
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.
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.
) describes some important differences between solid state
Publication
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.
1794-IN109D-EN-P - January 2014
Environment and Enclosure
ATTENTION
WARNING
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.
FLEX I/O 8 Output HART Analog Module 3
.
If you insert or remove the module 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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4 FLEX I/O 8 Output HART Analog Module
ATTENTION
ATTENTION
ATTENTION
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.
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.
To comply with the CE Low Voltage Directive (LVD), all connected I/O must be
powered from a source compliant with the following:
Safety Extra Low Voltage (SELV) or Protected Extra Low Voltage (PELV).
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FLEX I/O 8 Output HART Analog Module 5
WARNING
AVERTISSEMENT
ATTENTION
North American Hazardous Location Approval
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
nameplate indicating the hazardous location
temperature code. When combining prod ucts within a
system, the most adverse temperature code (lowest "T"
number) may be used to help determine the o verall
temperature code of the system. Combinations of
equipment in your system are subject to investigation
by the local Authority Having Jurisdiction at the time of
installation.
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.
• 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 Cla sse I
Division 2 Groupes A, B, C, D dangereux et non d angereux.
Chaque produit est livré avec des marquages sur sa plaqu e
d’identification qui indiquent le code de tem pérature pour les
environnements dangereux. Lorsque plusieu rs produits sont
combinés dans un système, le code de température le plus
défavorable (code de température le plus faible ) peut être
utilisé pour déterminer le code de température global du
système. Les combinaisons d’équipements dans le système
sont sujettes à inspection par 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 1,
Division 2.
• S’assurer que l’environnement est
classé non dangereux avant de
changer les piles.
For Class I Division 2 applications, use only Class I Division 2 Listed or
Recognized accessories and modules approved for use within 1794 platform.
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6 FLEX I/O 8 Output HART Analog Module
ATTENTION
WARNING
WARNING
European Hazardous Location Approval
European Zone 2 Certification (The following applies when the product bears the Ex
or EEx Marking.)
This equipment is intended for use in potentially explosive atmospheres as defined by
European Union Directive 94/9/EC and has been found to comply with the Essential Health
and Safety Requirements relating to the design and construction of Category 3 equipment
intended for use in potentially explosive atmospheres, given in Annex II to this Directive.
Compliance with the Essential Health and Safety Requirements has been assured by
compliance with EN 60079-15 and EN 60079-0.
This equipment is not resistant to sunlight or other sources of UV radiation.
• This equipment must be installed in an enclosure providing at least IP54
protection when applied in Zone 2 environments.
• This equipment shall be used within its specified ratings defined by
Allen-Bradley.
• Provision shall be made to prevent the rated voltage from being
exceeded by transient disturbances of more than 40% when applied in
Zone 2 environments.
• This equipment must be used only with ATEX certified backplanes.
• Secure any external connections that mate to this equipment by using
screws, sliding latches, threaded connectors, or other means provided
with this product.
• Do not disconnect equipment unless power has been removed or the
area is known to be nonhazardous.
Removal and Insertion Under Power
When you insert or remove the module 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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FLEX I/O 8 Output HART Analog Module 7
ATTENTION
40231
3
4
7
1
2
6
5
8
Label here or under here
About the Module
The HART analog modules can be used with ControlNet, Ethernet and
Profibus-DP (1794-APBDV1 only) adapters. When using the Series B module
with a Series B profile, you must have a ControlNet adapter Revision 5.1 or
higher or an Ethernet adapater Revision 4.2 or higher.
For this scenario (Series A profile with a Series B Module), the data maps
(input, configuration and extended configuration) are designated as Series A
Mode. Note, all other data maps are for a Series B module with a Series B
profile.
Only use the series A configuration when replacing a series A module with a
series B module. If you access the Series A configuration while using the
module as a series B unpredictably operation of the module may occur.
Install the Module
Read this for information about how to install the module. The module must
be used with a 1794-TB3G or 1794-TB3GS terminal base unit.
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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8 FLEX I/O 8 Output HART Analog Module
ATTENTION
IMPORTANT
IMPORTANT
IMPORTANT
41307
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.
You must disable keying in your profile when replacing a series A module with
a series B module.
To install the module on a 1794 terminal base, refer to the figure and
complete the following.
1. Rotate the keyswitch (1) on the terminal base (2) clockwise to position
4 as required for this type of module.
Do not change the position of the keyswitch after wiring the terminal base
unit.
2. Make sure the flexbus connector (3) is pushed all the way to the left to
connect with the neighboring terminal base or 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.
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 terminal base unit to the right
of this terminal base unit if required.
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FLEX I/O 8 Output HART Analog Module 9
WARNING
44864
Wire the 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.
To connect two-wire transmitter devices for 1794-TB3G and 1794-TB3GS
bases, refer to the tables and figure and complete the following.
Module Wiring
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
_
+
Ch0
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
16
_
Chassis
+
Ground
Ch4
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
34
+V (COM)
NC
24V DC
Supply In
+V = +24V DC = Terminals C-34 and C-50
-V = COM = C-35 and C-51
Chassis Ground = Terminals B-16, B-33, C-38, C-40…45, and C-47
NC = No connection
For daisy-chaining : Supply in C-34 (+V) and C-35 (COM)
Supply out C-50 (+V) and C-51 (COM)
_
+
Ch1
_
+
Ch5
_
+
Ch2
+
Ch6
Chassis Grounds
_
+
Ch3
_
+
Ch7
_
A
B
Chassis
Ground
NC
+V (COM)
24V DC
Supply Out
(1794-TB3G shown)
C
1. Connect the individual input wiring to (+) terminals (0, 4, 8, 12) on
the 0 to 15 row (A) and on the 16 to 33 row (B) (terminals 17, 21, 25,
29) as indicated in the table Wire Connections.
2. Connect the associated input to the corresponding (-) terminal (1, 5,
9, 13) on the 0 to 15 row (A), and on the 16 to 33 row (B) (terminals
18, 22, 26, 30) for each input as indicated in the table Wire
Connections.
3. Connect +V DC power to terminal 34 on the 34 to 51 row (C).
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10 FLEX I/O 8 Output HART Analog Module
ATTENTION
ATTENTION
4. Connect -V to terminal 35 on the 34 to 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.
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.
The 1794-OE8H module shall be used only with Listed Allen-Bradley (Rockwell
Automation) Power Supply (catalog number 1794-PS13) or Listed Class 2 source.
To reduce susceptibility to noise, power analog modules and digital modules
from separate power supplies.
Wire Connections
Output Output + Output - Output Output + Output -
Output 0 A-0 A-1 Output 4 B-17 B-18
Output 1 A-4 A-5 Output 5 B-21 B-22
Output 2 A-8 A-9 Output 6 B-25 B-26
Output 3 A-12 A-13 Output 7 B-29 B-30
+V Terminals 34 and 50
-V Terminals 35 and 51
Terminals B-16, B-33, C-38, C-40, C-41, C-43, C-43, C-44, C-45 and C-48 are connected to
chassis ground
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FLEX I/O 8 Output HART Analog Module 11
IMPORTANT
44862
43849
HART
Modem
1794-OE8H/B
Bus
uC
FlexBus
45 Ω
21.6 V
250 Ω
+V
-V
+
4...20 mA
sig
-
4...20 mA
F
I
Power Supply
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.
Outputs
Each output can operate an analog field device.
The channels in these modules are electrically connected to each other and
have a common plus-line.
When interconnecting several lines, you must consider the total accumulated
power.
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43850
0
mA
10 20 25
Volt age
V DC
20.5
15
0
515
12 FLEX I/O 8 Output HART Analog Module
Output Voltage/Currency Capability
Input Map
Bit
Word1514131211109 8 76543210
0FA
1 Reserved
2HCF
3HP
Where: Ch = channel
FA
FA
FA
FA
FA
Ch7
Ch6
Ch5
Ch4
Ch3
Ch2
HCF
HCF
HCF
HCF
Ch7
Ch6
Ch5
Ch4
HP
HP
HP
Ch7
Ch6
Ch5
Ch4
FA = fault
HR = HART rebuilding
HCF = HART current fault
HF = HART communication fault
HP = HART present
HC = HART communication
Ch3
HP
Ch3
HCF
Ch2
HP
Ch2
FA
Ch1
HCF
Ch1
HP
Ch1
FA
HR Reserved Diagnostic Status
Ch0
HCF
HF
HF
HF
HF
Ch0
Ch7
HP
Ch0HCCh7
Ch6
HC
Ch
6
Ch5
HC
Ch5
Ch4
HC
Ch4
HF
Ch3
HC
Ch3
HF
Ch2
HC
Ch2
HF
Ch1
HC
Ch1
HF
Ch0
HC
Ch0
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FLEX I/O 8 Output HART Analog Module 13
Output Map
Bit
Word1514131211109876543210
0 Res FR Reserved DD
1 Channel 0 Output Data
2 Channel 1 Output Data
3 Channel 2 Output Data
4 Channel 3 Output Data
5 Channel 4 Output Data
6 Channel 5 Output Data
7 Channel 6 Output Data
8 Channel 7 Output Data
Where: Res = reserved
Ch = channel
DD = digital data
FR = fault reset
Ch7
DD
Ch6
DD
Ch5
DD
Ch4
DD
Ch3
DD
Ch2
DD
Ch1
DD
Ch0
Configuration Map
Bit
Word 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 LFM VR FE
1HD
Ch7
2 Data Format Ch3 Data Format Ch2 Data Format Ch1 Data Format Ch0
3 Data Format Ch7 Data Format Ch6 Data Format Ch5 Data Format Ch4
4 HART Read Back
Threshold Ch1
5 HART Read Back
Threshold Ch3
6 HART Read Back
Threshold Ch5
HD
Ch6
Ch7
HD
Ch5
FE
Ch6
HD
Ch4
FE
Ch5
HD
Ch3
FE
Ch4
HD
Ch2
FLE
Ch1
FLE
Ch3
FLE
Ch5
Byte
Order
Group B
HD
HD
Ch1
Ch0
AFM
Ch1
AFM
Ch3
AFM
Ch5
HS
HSI FE
LEDs
HHE
Ch7
HART Read Back
Threshold Ch0
HA
Threshold Ch2
HART Read Back
Threshold Ch4
Ch3
HHE
HHE
Ch6
Ch5
RT Read Back
FE
Ch2
HHE
Ch4
FE
Ch1
HHE
Ch3
FE
Ch0
HHE
Ch2
FLE
Ch0
FLE
Ch2
FLE
Ch4
Byte
Order
Group A
HHE
HHE
Ch1
Ch0
AFM
Ch0
AFM
Ch2
AFM
Ch04
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14 FLEX I/O 8 Output HART Analog Module
Configuration Map
Bit
Word 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
7 HART Read Back
Threshold Ch7
8DF
9 Fault Value Ch0
10 Fault Value Ch1
11 Fault Value Ch2
12 Fault Value Ch3
13 Fault Value Ch4
14 Fault Value Ch5
15 Fault Value Ch6
16 Fault Value Ch7
17 HR
Where LFM = local fault mode VR = verify replacement
DF
Ch7
Ch7
DF
Ch6
Ch5
HR
HR
Ch6
Ch5
FE = fault enable HD = HART disable
HHE = HART handheld enable FLE = fault latch enabled
AFM = analog fault mode DF = digital fault mode
DM = digital mode HR = HART rebuild
HC = HART CMD3 disable
DF
Ch4
HR
Ch4
DF
Ch3
HR
Ch3
FLE
Ch7
DF
Ch2
HR
Ch2
AFM
Ch7
DF
Ch1
HR
Ch1
HART Read Back
Threshold Ch6
DF
DM
Ch0
Ch7
HR
HC
Ch0
Ch7
DM
Ch6
HC
Ch6
DM
Ch5
HC
Ch5
DM
Ch4
HC
Ch
FLE
AFM
Ch6
Ch06
DM
DM
Ch2
HC
Ch2
DM
Ch1
HC
Ch1
Ch3
HC
4
Ch3
DM
Ch0
HC
Ch0
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FLEX I/O 8 Output HART Analog Module 15
Byte Order Configuration
Byte Order
Group B
Byte Order
Group A
Description
Bit 9 Bit 8 Bit 1 Bit 0
0 0 0 0 Little Endian Format (Default) = All data entries in true little
Endian format.
1 0 1 0 Word Swap = Word swap only values requiring more then one
word,
for example: 32 bit float values.
0 1 0 1 Byte Swap (reserved for future implementation) = Byte swap all
words in data table.
1 1 1 1 Big Endian Format (reserved for future implementation) = All data
entries in true Big Endian format.
(1)
All other combinations are invalid. Values will Revert to the last valid configuration (in case of original
start-up this would be default configuration) and set module Diagnostic Status to "2" configuration
failure.
(1)
Data Format - Write Words 2 and 3
Data
Format
0 00000…20 mA as
1 00010…20 mA as %0.00 22.00 0
2 0010Not assigned
3 00110…20 mA as
4 01004…20 mA as mA2.00 22.00 2000
5 0101Not assigned
6 0110
Bits Format Signal Range User Range Resolution
15 14 13 12
11 10 9 8
7654
3210
Milliamps
unsigned
LO HI LO HI
0.00 22.00 0
(0.000 mA)
(0%)
0.00 20.00 0
(0.000 mA)
22000
(22.000 mA)
11000
(110.00%)
65535
(22.000 mA)
0.1% of
0...20 mA
0.2% of
0...20 mA
0.03% of
0...20 mA
integer
(2.000 mA)
22000
(22.000 mA)
0.01% of
4...20 mA
Not assigned
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16 FLEX I/O 8 Output HART Analog Module
IMPORTANT
Data Format - Write Words 2 and 3
Data
Format
7 01114…20 mA as
8 1000Not assigned
9 1001
10 1010
11 10110...20 mA as
12 1100Not assigned
13 11014...20 mA as %3.00 21.00 -625
14 11104...20 mA as %2.00 22.00 -1250
15 1111Not assigned
Bits Format Signal Range User Range Resolution
15 14 13 12
11 10 9 8
7654
3210
unsigned
interger
D/A count
LO HI LO HI
4.00 20.00 0
(4 mA)
0.00 22.00 0
(0 mA)
(-6.25%)
(-12.50%)
65535
(20 mA)
8000
(22 mA)
10625
(106.25%)
11250
(112.50%)
0.03% of
4...20 mA
0.28% of
0...20 mA
0.16% of
4...20 mA
0.16% of
4...20 mA
Cyclic HART Input Data
The HART input data holds the primary variables for the "live" HART
device, and other information gathered during the normal HART scan.
Additional "documentary" data is available through the pass through message
interface in the device information tables. Pass through messages are defined
in detail in the User Manual.
Publication
The HART Input Data for a channel may be zeroes if HART communications is
disabled for that channel. For more information on disabling HART
communications, refer to the Disable HART communications and HART CMD
3 Disable functions in the Configuration Map table.
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FLEX I/O 8 Output HART Analog Module 17
HART Input Data
Word Bit
1514131211109876543210
0 Reserved Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0
(HART Communications Status)
1 Reserved
2 Ch0 HART Field Device Status Ch0 HART Comm Status
3 Reserved Ch0 HART Loop Status
4 Ch0 HART Primary Value
(IEEE 754-1985 Single-Precision 32 bit floating point)
5
6 Ch0 HART Secondary Value
(IEEE 754-1985 Single-Precision 32 bit floating point)
7
8 Ch0 HART Tertiary Value
(IEEE 754-1985 Single-Precision 32 bit floating point)
9
10 Ch0 HART Fourth (Quaternary) Value
(IEEE 754-1985 Single-Precision 32 bit floating point)
11
12 Ch0 Secondary Value Units Code Ch0 Primary Value Units Code
13 Ch0 Fourth Value Units Code Ch0 Tertiary Value Units Code
14 Ch1 HART Field Device Status Ch1 HART Communication Status
15 Reserved Ch1 HART Loop Status
16 Ch1 HART Primary Value
17
18 Ch1 HART Secondary Value
19
20 Ch1 HART Teritiary Value
21
22 Ch1 HART Fourth Value
23
24 Ch1 HART Secondary Value Units Code Ch1 HART Primary Value Units Code
25 Ch1 HART Fourth Value Ch1 HART Tertiary Value Units Code
26 Ch2 HART Field Device Status Ch2 HART Communication Status
27 Reserved Ch2 HART Loop Status
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18 FLEX I/O 8 Output HART Analog Module
HART Input Data
Word Bit
1514131211109876543210
28 Ch2 HART Primary Value
29
30 Ch2 HART Secondary Value
31
32 Ch 2 HART Tertiary Value
33
34 Ch2 HART Fourth Value
35
36 Ch2 HART Secondary Value Units Code Ch2 HART Primary Value Units Code
37 Ch2 HART Fourth Value Ch2 HART Tertiary Value Units Code
38 Ch3 HART Field Device Status Ch3 HART Communication Status
39 Reserved Ch0 HART Loop Status
40 Ch3 HART Primary Value
41
42 Ch3 HART Secondary Value
43
44 Ch3 HART Tertiary Value
45
46 Ch3 HART Fourth Value
47
48 Ch3 HART Secondary Value Units Code Ch3 HART Primary Value Units Code
49 Ch3 HART Fourth Value Ch3 HART Tertiary Value Units Code
50 Ch4 HART Field Device Status Ch4 HART Communication Status
51 Reserved Ch4 HART Loop Status
52 Ch4 HART Primary Value
53
54 Ch4 HART Secondary Value
55
56 Ch4 HART Tertiary Value
57
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FLEX I/O 8 Output HART Analog Module 19
HART Input Data
Word Bit
1514131211109876543210
58 Ch4 HART Fourth Value
59
60 Ch4 HART Secondary Value Units Code Ch4 HART Primary Value Units Code
61 Ch4 HART Fourth Value Ch4 HART Tertiary Value Units Code
62 Ch5 HART Field Device Status Ch5 HART Communication Status
63 Reserved Ch5 HART Loop Status
64 Ch5 HART Primary Value
65
66 Ch5 Secondary Value
67
68 Ch5 Tertiary Value
69
70 Ch5 Fourth Value
71
72 Ch5 HART Secondary Value Units Code Ch5 HART Primary Value Units Code
73 Ch5 HART Fourth Value Ch5 HART Tertiary Value Units Code
74 Ch6 HART Field Device Status CH6 HART Communication Status
75 Reserved Ch6 HART Loop Status
76 Ch6 HART Primary Value
77
78 Ch6 Secondary Value
79
80 Ch6 Tertiary Value
81
82 Ch6 Fourth Value
83
84 Ch6 HART Secondary Value Units Code Ch6 HART Primary Value Units Code
85 Ch6 HART Fourth Value Ch6 HART Tertiary Value Units Code
86 Ch7 HART Field Device Status CH7 HART Communication Status
87 Reserved Ch7 HART Loop Status
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20 FLEX I/O 8 Output HART Analog Module
HART Input Data
Word Bit
1514131211109876543210
88 Ch7 HART Primary Value
89
90 Ch7 Secondary Value
91
92 Ch7 Tertiary Value
93
94 Ch7 Fourth Value
95
96 Ch7 HART Secondary Value Units Code Ch7 HART Primary Value Units Code
97 Ch7 HART Fourth Value Ch7 HART Tertiary Value Units Code
HART Input Data Descriptions
Chn: HART CMD 3 Communication
Status
Chn: HART Comm Status (HART CMD3
Response first status byte):
Chn: HART Field Device Status (HART
CMD3 Response second status byte):
Publication
1794-IN109D-EN-P - January 2014
0: HART CMD3
Communication Disabled or
No Error
Refer to User Manual
Refer to User Manual
1: HART CMD3
Communication Error
between Adapter &
Module
HART Input Data Descriptions
FLEX I/O 8 Output HART Analog Module 21
Chn: HART Loop Status:
Bit 0: HART enable
Bit 1: Device Connected
Bit 2: Response Error
Bit 3: CMD 48 Update
Bit 4: HART Loop Tolerance Error
Bit 5: HART Update
Bit 6: HART message
Bit 7:
Where PVA = The primary variable for this channel has been acquired.
SVA = The secondary variable for this channel has been acquired.
TVA = The tertiary variable for this channel has been acquired.
FVA = The fourth (quaternary) variable for this channel has been acquired.
0: Disabled
0: Not Connected
0: No HART message
failure
0: CMD 48 not
updated
0: No HART Current
Fault
0: HART Device
information not
updated
0: No new message
1: Enabled
1: Connected
1: Response ended in error
1: CMD 48 updated
1:HART Current Fault
1: HART Device information
updated since last read
1: HART user message queue
has completed a message
Reserved
HART Read Back Threshold
HART Read Back Decimal Bits
Value76543
15 14 13 12 11
Disabled 0 00000
Not applicable
Not applicable 2 0 0 0 1 0
Not applicable 3 0 0 0 1 1
Not applicable 4 0 0 1 0 0
5% 5 00101
6% 6 00110
7% 7 00111
8% 8 01000
(1)
1 00001
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22 FLEX I/O 8 Output HART Analog Module
HART Read Back Threshold
HART Read Back Decimal Bits
Value76543
15 14 13 12 11
9% 9 01001
10% 10 0 1 0 1 0
… … ……………
30% 30 1 1 1 1 0
31% 31 1 1 1 1 1
(1)
1, 2, 3, and 4 are not applicable. Values between 1 and 4 will lead the IOM to automatically use
an internal value of 5%.
Configuration Map (Series A Mode)
Config Bit
Word 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
LFM Res FM
0
LM
1
2
3
4
5
6
7
8
9
10
Where: LFM = Local Fault Mode Res = Reserved
LM
Ch4...7
Ch0...3
DFS
DFS
Ch7
Ch6
Analog Fault State Value Channel 0
Analog Fault State Value Channel 1
Analog Fault State Value Channel 2
Analog Fault State Value Channel 3
Analog Fault State Value Channel 4
Analog Fault State Value Channel 5
Analog Fault State Value Channel 6
Analog Fault State Value Channel
FM = Fault Mode Ch = Channel
AFState = Analog Fault State LM = Latch Mode
DFS = Digital Fault State ADM = Analog/Digital Mode
Ch2...3
FM
Ch6...7
DFS
Ch5
FM
Ch0...1
FM
Ch4...5
DFS
Ch4
AFState
Ch2...3
AFState
Ch6...7
DFS
DFS
Ch3
Ch2
AFState
Ch0...1
AFState
Ch4...5
DFS
DFS
Ch1
Ch0ADM
Data Format
Ch2...3
Data Format
Ch6...7
AD
M
Ch6
Ch7
AD
M
Ch5
AD
M
Ch4
Data Format
Ch0...1
Data Format
Ch4...5
AD
AD
M
M
Ch2
Ch3
AD
M
Ch1
AD
M
Ch0
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FLEX I/O 8 Output HART Analog Module 23
The extended configuration data table is accessed (read/write) by using a
MSG or CIO instruction. Refer to Field Descriptions on page 24 for more
information.
Extended Configuration Data Table (Series A Mode)
Config Bit
Word 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0PM
1 Reserved HART Read Back Threshold
Where: Ch = Channel PM = Primary Master Inhibit
PM
PM
PM
PM
PM
PM
PM
SME
SME
SME
SME
Ch7
Ch6
Ch5
Ch4
Ch3
Ch2
Ch1
Ch0
Ch7
Ch6
Ch5
HS
HS
Ch4...7
SME = Secondary Master Enable HS LED = HART Status LEDs
HS Inht = HART Status Inhibit
LED
Inht
50/6
0 Hz
SME
Ch4
Ch3
HART Read Back Threshold
Ch0...3
SME
Ch2
SME
Ch1
SME
Ch0
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24 FLEX I/O 8 Output HART Analog Module
Secondary Master Enable (SME)/ Primary Master Inhibit (PMI)
(Series A Mode)
(1)
Bits
PMI 8, 9, 10, 11, 12, 13, 14, 15 0 0 1 1
SME 0, 1, 2, 3, 4, 5, 6, 7 0 1 0 1
HART Smooth Fitler Pulsed On Off On
Rebuild On On Off Off
HART Read Back On On Off Off
Primary Master On On Off Off
Secondary Master Off On Off On
(1)
Where:
Ch 0 - bits 0 and 8; Ch 1 - bits 1 and 9; Ch 2 - bits 2 and 10; Ch 3 - bits 3 and 11; Ch 4 - bits 4 and
12; Ch 5 - bits 5 and 13; Ch 6 - bits 6 and 14; Ch 7 - bits 7 and 15
1 (Default) 2 3 4
Field Descriptions
Analog/Digital
Output Mode
Analog Output Data Specifies the value of the analog output data to the module. Specific
Digital Output Data Specifies the value of the digital output data to the module. This data
Global Reset This bit acts to reset all outputs to accept normal system output data.
Selects if the channel acts as a normal analog output or as a switched
digital output.
Analog Output mode will follow the Analog Data Format selected.
Digital Output mode will output 0 mA = OFF, 22 mA = ON if the Fault
mode is 0 = disable. Digital Output mode will output 2 mA = OFF, 22
mA = ON if the Fault mode is 1 = wire off fault detection enabled.
Range: 0 = normal analog output, 1 = switched digital output.
format is controlled by Module Data Format Control parameter. This
data is used when the channel is in Analog Output mode.
is used when the channel is in digital output mode.
Range: 0 = output, 0 mA = OFF, 1 = 22 mA = ON if the Fault mode is 0 =
disable. 0 = output, 2 mA = OFF, 1 = 22 mA = ON if the Fault mode is 1
= wire-off fault detection enabled.
It acts in conjunction with the Latch Retry parameter. If any channel
faults occur, the Latch Retry parameter can be set to cause the fault to
be latched and the output to go to its safe state value.
This is an edge-triggered signal. It must first be set (1). Reset will then
occur on the set-to-reset transition.
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FLEX I/O 8 Output HART Analog Module 25
Field Descriptions
Analog Fault State Determines how module reacts to faults when channel is used in
Analog Normal mode.
Range: 0 = go to minimum value of data range, 1 = go to maximum
value of data range, 2 = hold last state, or use analog fault state
value.
Analog Fault State
Value
Digital Fault State Determines how module reacts to faults when channel is used in
Fault Mode Selects whether the channel pair fault detection is enabled or
Latch Retry Mode Latch Retry determines channel operation under wire-off fault
Local Fault Mode This parameter determines how the Module Safe State will be used
Fault Alarm (8 or 1 Bit
Each)
HART Rebuild Flag
(1 of 1 Bit)
Specifies the fault state value of the analog output data to the module.
Specific format is controlled by Module Data Format Control
parameter. This data is used when the channel is in Analog Output
mode and the analog fault state is configured to use analog fault state
value.
digital mode.
Range: 0 = reset, 1 = hold last state.
disabled. There is a 100 Hz (10 ms) filter for wire-off/lead-break
detection.
Range: 0 = disable, 1 = wire-off fault detection enabled.
conditions. These bits control the action of two channel groups channels 0…3 and channels 4…7. When a channel fault occurs, the
channel fault alarm will be set (if enabled) and the safe state mode
will be enabled. If retry is selected, the channel will periodically try to
reestablish proper output. If latch is selected, the fault will be latched
until a Global Reset is issued.
Range: 0 = retry, 1 = latch.
for bus communication and internal module faults. This parameter sets
this characteristic for the module.
Range: 0 = fault states activated by bus communication faults, 1 = fault
states activated by any failure (for example, bus communications).
Alarm signal for open wire channel fault, detected at < 2 mA. This
alarm is disabled when a data format is selected which includes 0 mA.
Range: 0 = normal, 1 = wire-off fault detected.
During the time the system is rebuilding the HART table, the HART
rebuild flag is set.
Range: 0 = normal, 1 = HART rebuilding.
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26 FLEX I/O 8 Output HART Analog Module
Field Descriptions
HART Read Back When this bit is set (1), it indicates that HART communications are
failing on the associated channel.
Range: 0 = normal, 1 = HART communication failure.
HART
Communication
HART Transmitter
List
Extended
Configuration
HART Status
Indicators
HART Status Inhibit When this bit is set (1), the HART communication status is not shown
50/60 Hz Filter Range: 0 = 50 Hz, 1 = 60 Hz.
HART Read Back
Threshold
Range: 0 = normal, 1 = HART communication is currently occurring.
When this bit is set (1), it indicates that a HART field device was found
during the rebuild sequence on the associated channel.
Range: 0 = transmitter was not found, 1 = HART transmitter was
found.
Configuration additions are needed for HART communications. An
extended configuration area is provided. This Extended Configuration
table is configured by writing a CIO or MSG instruction with the
following:
Class = 0x7D
Instance = Product location on flexbus
(Use 1 for the module
located next to the adapter.)
Attribute = 0x65
Service = Set Attribute Single (0x10).
When this bit is set (1), the indicators are used for HART diagnostic.
Indicator behavior changes to show communication on HART. Each
status indicator represents a HART loop. Flashing yellow indicates that
communication is currently being processed. Solid yellow means that
this device is in the transmitter list.
in the realtime data table. The appropriate areas are cleared with
zeroes.
Range: 0 = normal, 1 = inhibit HART.
Delivers the percentage value (in steps of 1%) of the threshold for
forcing the HART read back indication (input signal deviation
HART/Analog) with a 31% maximum deviation.
If there is no HART transmitter on the loop or the loop is not in the
transmitter list, the function is switched off internally in the I/O
module.
Range: 0 = disabled, 1…4 = not supported from I/O module (set to 5
internally), 5…31 = percentage threshold data (5…31%).
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FLEX I/O 8 Output HART Analog Module 27
ATTENTION
Cooperative Operation of the Adapter and the 1794-OE8H Output Module
The ControlNet adapter, EtherNet adapter, and the FlexLogix controllers
convey the Run/Program (Idle) mode and Communication Fault status
directly to the 1794-OE8H module. The 1794-OE8H module monitors this
information and determines its own fault state actions according to your
configuration. This allows for a more simplified approach to your
connections. With regard to the Program mode behavior and Network
Communication Fault, the 1794-OE8H module can be configured to:
• set Analog Output to Minimum Value.
• set Analog Output to Maximum Value.
•hold Last Analog Value.
• go to User Programmable Analog Value.
• set Digital Output to Minimum Value.
• hold Last Digital Value.
Repair
This module is not field repairable. Any attempt to open the module will void the
warranty. If repair is necessary, return the module to the factory.
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28 FLEX I/O 8 Output HART Analog Module
44865
Input Status
Power Status
Status Indicators
8 CH HART ANALOG OUTPUT
O1O0
O2
Interpret the Status Indicators
Status Description
Flashing red Channel fault -
Channel 0 indicator will turn red while power-up check is running
Solid green Power applied to module
O4O3
I/O
1794-OE8H
3
O6
O5
O7
PWR
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FLEX I/O 8 Output HART Analog Module 29
Specifications
FLEX I/O 8 Output HART Analog Module - 1794-OE8H, Series B
Attribute Value
Number of outputs 8 single-ended, non-isolated
Module base Catalog numbers 1794-TB3G, 1794-TB3GS
Resolution 13 bits
Absolute accuracy 0.1% Full Scale @ 20 °C (68°F)
Accuracy drift with
temperature
Functional data range >15V @ 22 mA
Data format Configurable
Step response to 99% of FS 4 ms
Conversion type Sigma Delta
Update rate see input update rate table
Output terminals (Terminals: 0...2; 4...6; 8...10; 12...14;
Power Supply
(Terminals: 34/50 (+);
Indicators 8 red fault indicators
Isolation voltage 50V (continuous), Basic Insulation Type
Voltage variation IEC 61000-4-29:
(1)
35/51 (-))
0.010% Full Scale for 0 °C...55 °C (32...131 °F)
>22V @ 0 mA
17...19; 21...23; 25...27; 29...31)
24V DC nominal using Catalog number 1794-PS13
19.2…31.2V DC (includes 5% ripple)
8 yellow HART communication indicators
1 green power
Routine tested at 850V DC for 1 s, between field side and
system
No isolation between individual channels
10 ms interruption on DC supply ports
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30 FLEX I/O 8 Output HART Analog Module
FLEX I/O 8 Output HART Analog Module - 1794-OE8H, Series B
Attribute Value
Flexbus current external
(2)
input
Power dissipation, max 6.1 W @ 31.2V DC
Enclosure type rating None (open-style)
Terminal base screw torque Determined by installed terminal base
Wire size Determined by installed terminal base
Wiring category
(3)
Wire type Shielded on signal ports
Thermal dissipation, max 20.8BTU/hr @31.2V DC
Keyswitch position 4
Dimensions (HxWxD),
approx.
Weight, approx. 200 g (7.05 oz)
North American
temperature code
IEC Temp Code T4
(1)
Includes offset, gain, nonlinearity. and repeatability error terms.
(2)
If 24V DC is removed from the module, input resistance = 10 kΩ.
(3)
Use this Conductor Category information for planning conductor routing. Refer to Industrial
Automation Wiring and Grounding Guidelines, publication 1770-4.1
5V DC 80 mA
24V DC 190 mA
2 - on signal ports
2 - on power ports
46.0 x 94.0 x 75.0 mm (1.8 x 3.7 x 2.95 in.)
T4A
.
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FLEX I/O 8 Output HART Analog Module 31
Environmental
Attribute Value
Temperature,
operating
Temperature,
nonoperating
Relative humidity IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):
Vibration IEC 60068-2-6 (Test Fc, Operating):
Shock, operating IEC 60068-2-27 (Test Ea, Unpackaged Shock):
Shock, nonoperating IEC 60068-2-27 (Test Ea, Unpackaged Shock):
Emissions CISPR 11:
ESD Immunity IEC 61000-4-2:
Radiated RF
Immunity
EFT/B Immunity IEC 61000-4-4:
Surge Transient
Immunity
Conducted RF
Immunity
IEC 60068-2-1 (Test Ad, Operating Cold),
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
-20...55 °C (-4...131 °F)
IEC 60068-2-1 (Test Ab, Unpackaged Nonoperating Cold),
IEC 60068-2-2 (Test Bb, Unpackaged Nonoperating Dry Heat)
IEC 60068-2-14 (Test Na, Unpackaged Nonoperating Thermal Shock):
–40...85 °C (–40...185 °F)
5…95% non-condensing
2 g @ 10...500 Hz
15 g
15 g
Group 1, Class A (with appropriate enclosure)
6 kV contact discharges
8 kV air discharges
IEC 61000-4-3:
10V/m with 1 kHz sine-wave 80% AM from 80...2500 MHz
1V/m with 1 kHz sine-wave 80% AM from 2500...2700 MHz
±2 kV at 5 kHz on power ports
±2 kV at 5 kHz on signal ports
IEC 61000-4-5:
±1 kV line-line(DM) and ±2 kV line-earth(CM) on power ports
±2 kV line-earth(CM) on shielded ports
IEC 61000-4-6:
10V rms with 1 kHz sine-wave 80%AM from 150 kHz...80 MHz
Publication
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Certifications
Certification (when
product is marked)
c-UL-us UL Listed for Class I, Division 2 Group A,B,C,D Hazardous
CE European Union 2004/108/EC EMC Directive, compliant with:
C-Tick Australian Radiocommunications Act, compliant with:
Ex European Union 94/9/EC ATEX Directive, compliant with:
(1)
See the Product Certification link at http://www.ab.com for Declaration of Conformity, Certificates,
and other certification details.
Valu e
(1)
Locations, certified for U.S. and Canada. See UL File E194810.
EN 61326-1; Meas./Control/Lab., Industrial Requirements
EN 61000-6-2; Industrial Immunity
EN 61000-6-4; Industrial Emissions
EN 61131-2; Programmable Controllers (Clause 8, Zone A & B)
AS/NZS CISPR 11; Industrial Emissions
EN 60079-15; Potentially Explosive Atmospheres, Protection "n"
(II 3 G Ex nA IIC T4 X)
EN 60079-0; General Requirements (Zone 2)
Publication 1794-IN109D-EN-P - January 2014 PN-235061
Supersedes Publication 1794-IN109C-EN-P - May 2009 Copyright © 2014 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
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