Rockwell Automation 1794-IF2XOF2IXT User Manual

Page 1

Installation Instructions

FLEX XT I/O Isolated Input Analog Module

Cat. No. 1794-IF4IXT, 1794-OF4IXT, 1794-IF2XOF2IXT

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 we use notes to make you aware of safety considerations.

WARNING

ATTENTION

IMPORTANT

ATTENTION

WARNING

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 about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. Attentions help you:

• identify a hazard

• avoid a hazard

• recognize the consequence

Identifies information that is critical for successful application and understanding of the product.

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.

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.

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.

European Hazardous Location Approval

ATTENTION

FLEX I/O 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.

ATTENTION

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.

WARNING

Personnel responsible for the application of safety-related programmable electronic systems (PES) shall be aware of the safety requirements in the application of the system and shall be trained in using the system.

To comply with the CE Low Voltage Directive (LVD), all connections to this equipment must be powered from a source compliant with the following: Safety Extra Low Voltage (SELV) or Protected Extra Low Voltage (PELV).

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.

Observe the following additional Zone 2 certification requirements.

• 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.

• 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.

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North American Hazardous Location Approval

The following adapters are North American Hazardous Location approved: 1794-IF4IXT, 1794-OF4IXT, 1794-IF2XOF2IXT

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 overall temperature co de of the system. Combinations of equipment in your system are subject to investigation by the local Authority Having Jurisdiction at the time of installation.

WARNING

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 Classe I Division 2 Groupes A, B, C, D dang ereux et non dangereux. Chaque produit est livré avec des marquages sur sa plaque d’identification qui indiquent le code de température pour les environnemen ts dangereux. Lorsque plusieurs prod uits sont combinés dans un système, le code de température le plus défavorable (code de température le plus faib le) 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.

AVERTISSEMENT

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 I, Division 2.

• S’assurer que l’environnement est classé non dangereux avant de changer les piles.

Install Your Analog Input Module

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.

Connect Wiring for Analog Inputs and Outputs

1. 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS -

Connect individual input/output wiring to numbered terminals on the 0-15 row (A) as indicated in the Wire Connections table.

Use Belden 8761 cable for signal wiring. 1794-TBN - Connect individual input/output wiring to even

numbered terminals on the 16-33 row (B) as indicated in the following table. Use Belden 8761 cable for signal wiring.

ATTENTION

2. 1794-TB2, -TB3, -TB3S, -TB3T, -TB3TS - Connect each channel

3. Connect any signal wiring shields to functional ground as near as

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

ATTENTION

Connect only one current or one voltage signal per channel. Do not connect both current and voltage on one channel.

signal return to numbered terminals on 0-15 row (A) as indicated in the following table. Use Belden 8761 cable for signal wiring. 1794-TBN - Connect each channel signal return to odd numbered terminals on row (C) as indicated in the following table.

possible to the module.

1794-TB3T or -TB3TS only: Connect cable shield to terminate C-39 through C-46 (earth ground).

-V common/return to terminal 16 on the B row.

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

ATTENTION

The module mounts on a 1794 terminal base.

1. Rotate the keyswitch (1) on the terminal base (2) clockwise to

2. Make certain the flexbus connector (3) is pushed all the way to the

3. Make sure the pins on the bottom of the module are straight so

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.

Keep a minimum of 25 mm (1 in.) of space on the top and bottom of the module, for adequate ventilation between equipment.

position 3 as required for 1794-IF4IXT, position 4 for 1794-OF4IXT, and position 5 for 1794-IF2XOF2IXT.

left to connect with the neighboring terminal base/adapter.

You cannot install the module unless the connector is fully extended.

they will align properly with the connector in the terminal base.

5. If daisychaining +V power to the next terminal base, connect a

jumper from terminal 51 (+V DC) on this base unit to terminal 34 on the next base unit.

6. If continuing DC common (-V) to the next base unit, connect a

jumper from terminal 33 (common) on this base unit to terminal 16 on the next base unit.

Wire Connections for 1794-IF4IXT, 1794-OF4IXT, 1794-IF2XOF2IXT Modules

Channel Signal

Input 0 Current I0 A-0 C-39 B-0

Input 1 Current I1 A-4 C-41 B-4

Output 0 Current I2 A-8 C-43 B-8

Output 1 Current I3 A-12 C-45 B-12

Typ e

Current I0 Ret A-1 C-1 Voltage V0 A-2 C-40 B-2 Voltage V0 Ret A-3 C-3

Current I1 Ret A-5 C-5 Voltage V1 A-6 C-42 B-6 Voltage V1 Ret A-7 C-7

Current I2 Ret A-9 C-9 Voltage V2 A-10 C-44 B-10 Voltage V2 Ret A-11 C-11

Current I3 Ret A-13 C-13 Voltage V3 A-14 C-46 B-14 Voltage V3 Ret A-15 C-15

Label Markings

1794-TB2, -TB3, -TB3S, -TB3T,

-TB3TS Terminal Shield (1794-TB3T,

-TB3TS

1794-TBN

Terminal

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Channel Signal

-V DC Common

+V DC Power

Chassis Ground (Shield)

Typ e

1794-TB2, -TB3, -TB3S - Terminals B-16 through B-33 are internally connected in the terminal base unit. 1794-TBN - Terminals B-16 and B-33 are internally connected in the terminal base unit. 1794-TB3T, -TB3TS - Terminals 16, 17, 19, 21, 23, 25, 27, 29, 31 and 33 are internally connected in the terminal base unit.

1794-TB3, -TB3S - Terminals 34 through 51 are internally connected in the terminal base unit. 1794-TB3T, -TB3TS - Terminals 34, 35, 50 and 51 are internally connected in the terminal base unit. 1794-TBN, -TB2 - Terminals 34 and 51 are internally connected in the terminal base unit.

1794-TB3T, -TB3TS - Terminals 39 through 46 are internally connected to chassis ground.

Label Markings

1794-TB2, -TB3, -TB3S, -TB3T,

-TB3TS Terminal Shield (1794-TB3T,

-TB3TS

1794-TBN

Terminal

7. 1794-TB2, -TB3, and -TB3S - Connect wiring shields to functional

earth ground as near as possible to the module.

1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T and 1794-TB3TS Terminal Base Wiring

I RVRIRVR IRVRIRVR

1 2 3 4 5 6 7 8 9 10 11 12 13 14 150

0 123 45678

17 18 19 20 21 22 23 24 25 26 27 28 29 30 333231

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

Current Output Device

AC or DC

4-Wire Output

Device

I I

Current Output Device

DC only

3-Wire Output

Device

9101112

Current Output Device

Current only

2-Wire Output

Device

13 1514

Voltage Output Device

DC only

3-Wire Output

Device

0-15

16-33

34-51

1794-TBN Terminal Base Wiring

Even Numbered Terminals 0 thru 14

16 0 2 4 6 8 10 12 14 33

34 1 3 5 7 9 11 13 15 51

Current

Input

AC or DC

4-Wire Current

Transmitter

Current

Transmitter

Input

DC only 3-Wire

Current

Input

Current only

2-Wire Current

Transmitter

Voltage

Input

DC only

3-Wire

Transmitter

16, 0, 2, 4, 6, 8, 10, 12, 14, 33

34, 1, 3, 5, 7, 9, 11, 13, 15, 51

1794-TBN shown

Row B

Row C

Input Map (1794-IF4IXT)

Dec. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0

Word 0 Analog Value Channel 0 Word 1 Analog Value Channel 1 Word 2 Analog Value Channel 2 Word 3 Analog Value Channel 3 Word 4 Real Time Sample Word 5 PU FP CF 0 Reserved 0 0 0 0 0 BD DN 0 Word 6 0 0 0 0 0 0 0 0 V3 V2 V1 V0 U3 U2 U1 U0 Where :

PU = Power up inconfigured FP = Field power off CF = In configuration mode BD = Bad calibration DN = Calibration accepted U = Underrange for specified channel V = Overrange for specified channel

Input Map (1794-OF4IXT, 1794-IF2XOF2XT)

Dec. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0 1794-OF4IXT

Word 0 Read Back Channel 0 Word 1 Read Back Channel 1

Dec. 1514131211109876543210 Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0

Word 2 Read Back Channel 2 Word 3 Read Back Channel 3 Word 4 PU FP CF 0 Reserved 0 0 0 0 0 BD DN 0 Word 5 0 0 0 0 P3 P2 P1 P0 0 0 0 0 W3 W2 W1 W0

1794-IF2XOF2XT

Word 0 Analog value for Input channel 0 Word 1 Analog value for Input channel 1 Word 2 Read Back Output channel 0 Word 3 Read Back Output channel 1 Word 4 0 Real Time Sample Word 5 PU FP CF 0 Reserved 0 0 0 0 0 BD DN 0 Word 6 0 0 0 0 P1 P0 0 0 0 0 V1 V0 W1 W0 U1 U0 Where :

PU = Power up inconfigured FP = Field power off CF = In configuration mode BD = Bad calibration DN = Calibration accepted P0 thru P3 = Output holding in response to Q0 thru Q3 W0 thru W3 = Wire off current loop status for channels 0 thru 3 respectively

Output Map (1794-IF4IXT)

Dec. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0

Word 0 EN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Word 1 Channel 3 Filter Channel 2 Filter Channel 1 Filter Channel 0 Filter Word 2 Ch 3 Configuration Ch 2 Configuration Ch 1 Configuration Ch 0 Configuration Word 3 0 Real Time Sample Interval Word 4 IC 1 TR IT 0 0 0 0 RV QK CK GO Channel Number Word 5 Reserved Where :

EN = Inable bit (not used on input module) IC = Initiate Configuration bit TR = Transparent bit IT = Interrupt toggle bit RV = Revert to default bit QK = Quick calibration CK = Calibration clock GO = Gain Offset select

Output Map (1794-OF4IXT)

Dec. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0 1794-OF4IXT

Word 0 EN S1 S0 0 0 0 0 0 0 0 0 0 0 0 0 0 Word 1 Output Data Channel 0 Word 2 Output Data Channel 1 Word 3 Output Data Channel 2 Word 4 Output Data Channel 3 Word 5 Ch 3 Configuration Ch 2 Configuration Ch 1 Configuration Ch 0 Configuration Word 6 IC 1 TR IT Q3 Q2 Q1 Q0 RV QK CK GO Channel Number

1794-IF2XOF2XT

Word 0 EN S1 S0 0 0 0 0 0 0 0 0 0 0 0 0 0 Word 1 Analog Output Data - Channel 0 Word 2 Analog Output Data - Channel 1 Word 3 0 0 0 0 0 0 0 0 Input Channel 1 Filter Input Channel 0 Filter Words 4 Output Channel 1

Configuration Word 5 0 Real Time Sample Programmed Interval Word 6 IC 1 TR IT Q1 Q0 0 0 RV QK CK GO Channel Number Where :

EN = Inable output - 0 = output follows S1/S0; 1 = output enabled S1/S0 = Safe state source IC = Initiate Configuration bit TR = Transparent bit IT = Interrupt toggle bit Q0 thru Q3 = Requests for outputs to hold RV = Revert to default bit QK = Quick calibration CK = Calibration clock GO = Gain Offset select

Output Channel 0 Configuration

Input Channel 1 Configuration

Input Channel 0 Configuration

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Configure Your Input Channels 1794-IF4IXT,

1794-IF2XOF2XT)

Input Channel Configuration

03 02 01 00 Set these bits for channel 0 07 06 05 04 Set these bits for channel 1 11 10 09 08 Set these bits for channel 2 15 14 13 12 Set these bits for channel 3

Bit Settings Input

0 0 0 0 Channel not configured 0 0 0 1 4…20 mA signed 2’s 0 0 1 0 ±10V 2% under; 2% over <831F-7CE1> 0 0 1 1 ±5V 4% under; 4% over <8618-79E8> 0 1 0 0 0…20 mA signed 2’s 0 1 0 1 4…20 mA 4% under; 4% over <0…10000> 0 1 1 0 0…10V 0% under; 2% over <0…10000> 0 1 1 1 ±10V 2% under; 2% over <-10000…10000> 1 0 0 0 0…20 mA binary 0% under; 4% over <0000…F3CF> 1 0 0 1 4…20 mA 4% under; 4% over <0000…F0F1> 1 0 1 0 0…10V 0% under; 2% over <0000…F9C2> 1 0 1 1 0…5V 0% under; 4% over <0000…F3CF> 1 1 0 0 ±20 mA offset binary,

1 1 0 1 4…20 mA offset binary,

1 1 1 0 ±10V offset binary, 1 1 1 1 ±5V 4% under; 4% over <0618…F9E8>

Data Format % Underrange

Values

complement

complement %

8000H = 0 mA

8000H = 4 mA

8000H = 0 mA

% Overrange

4% under; 4% over <0000-7878>

0% under; 4% over <0…10000>

4% under; 4% over <0618…F9E8>

4% under; 4% over <8000…F878>

2% under; 2% over <031F…FCE1>

Input Range

Input Update Rate for Real Time Sample Interval = 0 (1794-IF4IXT, 1794-IF2XOF2XT)

Configuration Bits

MSD LS D

0 0 0 1 4…20 mA 7.5 ms 5.0 ms 0 0 1 0 ±10V 2.5 ms 2.5 ms 0 0 1 1 ±5V 2.5 ms 2.5 ms 0 1 0 0 0…20 mA 7.5 ms 5.0 ms 0 1 0 1 4…20 mA 7.5 ms 5.0 ms 0 1 1 0 0…10V 5.0 ms 5.0 ms 0 1 1 1 ±10V 5.0 ms 5.0 ms 1 0 0 0 0…20 mA 2.5 ms 2.5 ms 1 0 0 1 4…20 mA 7.5 ms 5.0 ms 1 0 1 0 0…10V 2.5 ms 2.5 ms 1 0 1 1 0…5V 2.5 ms 2.5 ms 1 1 0 0 ±20 mA 2.5 ms 2.5 ms 1 1 0 1 4…20 mA 7.5 ms 5.0 ms 1 1 1 0 ±10V 2.5 ms 2.5 ms 1 1 1 1 ±5V 2.5 ms 2.5 ms

(1)

When IT = 1, the channel update rate for all channels is determined by the slowest channel.

Configure Your Output Channels (1794-OF4IXT)

Configuration Bits

MSD LSD

0 0 0 1 4…20 mA Signed 2’s 0 0 1 0

0 0 1 1 0 1 0 0 0…20 mA Signed 2’s 0 1 0 1 4…20 mA <0-10000> 5.0 ms

0 1 1 0 0…10V <0-10000> 5.0 ms 0 1 1 1 1 0 0 0 0…20 mA binary <0000-F3CF> 2.5 ms 1 0 0 1 4…20 mA <0000-F0F1> 5.0 ms 1 0 1 0 0…10V <0000-F9C2> 2.5 ms 1 0 1 1 0…5V <0000-F3CF? 2.5 ms 1 1 0 0 0…20 mA offset binary <0618-F9E8> 2.5 ms 1 1 0 1 4…20 mA <8000-F878> 5.0 ms 1 1 1 0 1 1 1 1

Input Nominal Ranges

Nominal Range

±10V ±5V

±10V

±10V ±5V

Channel Update

(1)

Rate

RTSI = 0 and

No low pass filter

Data Type Output Values Module Update

complement

complement %

Channel Update Rate RTSI and Filter = 0 IT bit = 1

Rate

<0000-7878> 5.0 ms <831F-7CE1> 2.5 ms

<8618-79E8> 2.5 ms <0-10000> 5.0 ms

<-10000-10000> 5.0 ms

<031F-FCE1> 2.5 ms <0618-F9E8> 2.5 ms

Set the Input Filters

Input Channel Configuration

03 02 01 00 Set these bits for channel 0 07 06 05 04 Set these bits for channel 1 11 10 09 08 Set these bits for channel 2 15 14 13 12 Set these bits for channel 3

Bit Settings A/D Conversion Rate Low Pass Filter

0 0 0 0 1200 Hz No low pass 0 0 0 1 1200 Hz 100 ms low pass 0 0 1 0 1200 Hz 500 ms low pass 0 0 1 1 1200 Hz 1000 ms low pass 0 1 0 0 600 Hz No low pass 0 1 0 1 600 Hz 100 ms low pass 0 1 1 0 600 Hz 500 ms low pass 0 1 1 1 600 Hz 1000 ms low pass 1 0 0 0 300 Hz No low pass 1 0 0 1 300 Hz 100 ms low pass 1 0 1 0 300 Hz 500 ms low pass 1 0 1 1 300 Hz 1000 ms low pass 1 1 0 0 150 Hz No low pass 1 1 0 1 150 Hz 100 ms low pass 1 1 1 0 150 Hz 500 ms low pass 1 1 1 1 150 Hz 1000 ms low pass

Power/status Indicator

The OK status indicator is bicolor red and green. The indicator flashes green for any of the following 3 reasons:

1. The module configuration word is zero (for example, powerup

reset condition).

(1)

2. The 24V DC user power is off.

3. The module is in configuration mode.

The indicator displays red to indicate the module did not pass the initial hardware test. Recycle power. After powerup, if the status indicator is not flashing green or solid green, recycle module power to verify a proper reset of the bus interface.

Specifications

General (Input)

Attribute Valu e

Number of inputs 4 isolated (1794-IF4IXT)

Resolution

Voltage Current

Update rate 2.5/5.0/7.5 ms all channels (see input update rate table)

Input current terminal 4…20 mA (user configurable)

Input voltage terminal ±10V (user configurable)

Input Resistance

Voltage terminal Current terminal

(1)

If 24V DC is removed fr om the module, input resistance = 10 kΩ

2 isolated (1794-IF2XOF2XT)

16 bits - unipolar; 15 bits plus sign - bipolar

0.156 mV/cnt unipolar; 0313 mV/cnt bipolar

0.320 μA/cnt unipolar; 0.640 μA/cnt bipolar

2.5/5.0 ms all channels (see input update rate table) (1794-OF4IXT)

0…20 mA (user configurable) ±20 mA (user configurable)

0…10V (user configurable) ±5V (user configurable) 0…5V (user configurable)

>10 MΩ

(1)

<100 Ω

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General (Output)

Attribute Valu e

Number of outputs 4 isolated (1794-OF4IXT)

Resolution

Voltage Current

Update rate 2.5/5.0/7.5 ms all channels (see input update rate table)

Output current terminal 0 mA output until module is configured

Output voltage terminal 0V output until module is configured

Current load on voltage output

Resistive load on current output

2 isolated (1794-IF2XOF2XT)

15 bits plus sign

0.320 mV/cnt

0.656 μA/cnt

2.5/5.0 ms all channels (see input update rate table) (1794-OF4IXT)

4…20 mA (user configurable 0…20 mA (user configurable

±10V user configurable) 0…10V user configurable) ±5V user configurable) 0…5V user configurable)

3 mA maximum

0…750 Ω

General

Attribute Value

Module location Cat. No. 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS,

Data format 2’s complement

Conversion type Sigma Delta

Update rate 2.5/5.0/7.5 ms all channels (see input update rate table)

Normal mode rejection ratio

- voltage or current Terminal

Common mode rejection ratio

Step response to 63% voltage or current terminal (1794-IF4IXT, 1794-IF2XOF2XT)

Step response to 63% of full scale (1794-OF4IXT, 1794-IF2XOF2XT)

Absolute accuracy voltage terminal current terminal

Accuracy drift with temperature

Voltage terminal

Current terminal

Calibration required Factory calibrated. Can be calibrated in field when necessary

Maximum overload 30V continuous or 32 mA continuous, one channel at a time.

Indicators 1 red/green power/status indicator

(1)

and 1794-TBN

2’s complement % binary offset binary

Digital to analog converter (1794-OF4IXT)

2.5/5.0 ms all channels (see input update rate table) (1794-OF4IXT)

-3 dB @ 12 Hz (300 Hz conversion rate)

-80 dB @ 50 Hz (300 Hz conversion rate)

-3 dB @ 6 Hz (150 Hz conversion rate)

-80 dB @ 60 Hz (150 Hz conversion rate)

-120 dB @ 50/60 Hz

1200 Hz conversion rate = 0.6 ms 600 Hz conversion rate = 06.7 ms 300 Hz conversion rate = 13.4 ms 150 Hz conversion rate = 26.7 ms

< 25 μs

0.1% Full Scale @ 25 °C

0.0028% Full Scale/°C (1794-IF4IXT, 1794-IF2XOF2XT)

0.0012% Full Scale/°C (1794-OF4IXT)

0.0038% Full Scale/°C (1794-IF4IXT, 1794-IF2XOF2XT)

0.0025% Full Scale/°C (1794-OF4IXT)

General

Attribute Value

Isolation voltage 120V (continuous), Basic Insulation Type, when used with 1794-TB2,

Flexbus current 50 mA

Power dissipation 2.0 W maximum @ 31.2V DC

Thermal dissipation Maximum 6.8 BTU/hr @ 31.2V DC

Keyswitch position 3 (1794-IF4IXT)

External DC Power Supply voltage

Voltage range Supply current

Dimensions 46 mm x 94 mm x 75 mm (1.8 in. x 3.7 in. x 2.95 in.) with module

Wire size Determined by installed terminal base

Wiring category

Wire type

Enclosure

Terminal screw torque Determined by installed terminal base

North American temp code T4

IEC temp code T4

(1)

(2)

Includes offset, gain, no nlinearity and repeatability error terms.

Use this Conductor Category information for planning conductor routing. Refer to Industrial Automation Wiring and Grounding Guidelines, publication 1770-4. 1.

1794-TB3, 1794-TB3S, 1794-TB3T, or 1794-TB3TS 250V (continuous), Basic Insulation Type, when used with 1794-TBN Type tested at 1500V AC for 60 s and Routine tested at 2550V DC for 1

s, between channel to power, channel to system, and power to

system, and channel to channel

4 (1794-OF4IXT) 5 (1794-IF2XOF2XT)

24V DC nominal

19.2…31.2V DC (includes 5% AC ripple) 80 mA @ 24V DC (1794-IF4IXT) 210 mA @ 24V DC (1794-OF4IXT) 150 mA @ 24V DC (1794-IF2XOF2XT)

installed in base

2 - on signal ports 2 - on power ports

Shielded on signal ports

None (open-style)

Environmental

Attribute Valu e

Operating temperature

Non-operating temperature

Relative humidity

Vibration IEC 60068-2-6 (Test Fc, Operating):

Operating shock IEC 60068-2-27 (Test Ea, Unpackaged Shock):

Non-operating shock

Emissions CISPR 11:

ESD immunity IEC 61000-4-2:

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…70 °C (-4…158 °F)

IEC 60068-2-1 (Test Ab, Unpackaged Non-operating Cold), IEC 60068-2-2 (Test Bb, Unpackaged Non-operating Dry Heat), IEC 60068-2-14 (Test Na, Unpackaged Non-operating Thermal Shock):

-40…85 °C (-40…185 °F)

IEC 60068-2-30 (Test Db, Unpackaged Damp Heat): 5…95% noncondensing

5 g @ 10…500 Hz

30 g

IEC 60068-2-27 (Test Ea, Unpackaged Shock): 50 g

Group 1, Class A (with appropriate enclosure)

6 kV contact discharges 8 kV air discharges

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Environmental

Radiated RF immunity

EFT/B immunity IEC 61000-4-4:

Surge transient immunity

Conducted RF immunity

Certifications (when product is marked)

Attribute Val ue

c-UL-us

C-Tick

TÜV

(1)

See the Product Certification link at http://w ww.ab.com for Declaration of Conformity, Certificates, and o ther certification details.

IEC 61000-4-3: 10V/m with 1 kHz sine-wave 80% AM from 80…2000 MHz 10V/m with 200 Hz 50% Pulse 100% AM at 900 MHz 10V/m with 200 Hz 50% Pulse 100% AM at 1890 MHz 3V/m with 1 kHz sine-wave 80% AM from 2000…2700 MHz

±2 kV at 5 kHz on power ports ±2 kV at 5 kHz on shielded 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 signal ports

IEC 61000-4-6: 10V rms with 1 kHz sine-wave 80% AM from 150 kHz…80 MHz

(1)

UL Listed Industrial Control Equip ment, certified for US and Canada. See UL File E65584. UL Listed for Class I, Division 2 Group A,B,C,D Hazardous Locations, certified for U.S. and Canada. See UL File E194810.

European Union 2004/108/EC EMC Directive, compliant with: EN 61326-1; Meas./Control/Lab., Industrial Requir ements EN 61000-6-2; Industrial Immunity EN 61000-6-4; Industrial Emissions EN 61131-2; Programmable Controllers (Clause 8, Z one A & B)

European Union 2006/95/EC LVD, compliant with: EN 61131-2; Programmable Controllers (Clause 11)

Australian Radiocommunications Act, compliant with: AS/NZS CISPR 11; Industrial Emissions

European Union 94/9/EC ATEX Directive, compliant with: EN 60079-15; Potentially Explosive Atmo spheres, Protection "n" (II 3 G Ex nA IIC T4 X) EN 60079-0; General Requirements (Zone 2)

TÜV Certified for Functional Safety: up to and including SIL 2

Publication 1794-IN129B-EN-P - April 2009 6 PN-46754