Rockwell Automation Allen-Bradley 1794-IA8, Allen-Bradley 1794-IA8I, Allen-Bradley 1794-IA16 Installation Instructions Manual

Installation Instructions

FLEX I/O AC Digital Input Modules

Catalog numbers 1794-IA8, 1794-IA8I, 1794-IA16

Table of Contents

Topic Page

Important User Information 2

Environment and Enclosure 3

Preventing Electrostatic Discharge 3

North American Hazardous Location Approval 4

Installing Your AC Digital Input Module 6

Configuring Your AC Input Module 14

Specifications 16

2 FLEX I/O AC Digital Input Modules

Important User Information

Solid-state equipment has operational characteristics differing from those of electromechanical
equipment. Safety Guidelines for the Application, Installation, and Maintenance of Solid-State Controls
(Publication SGI-1.1

http://www.rockwellautomation.com/literature/

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.

available from your local Rockwell Automation Sales Office or online at

WARNING: 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.

ATTENTION: 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

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

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

IMPORTANT Identifies information that is critical for successful application and understanding of

the product.

Publication 1794-IN102C-EN-P - July 2015

Environment and Enclosure

ATTENTION: This equipment is intended for use in a Pollution Degree 2

industrial environment, in overvoltage Category II applications (as defined in IEC
publication 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 Publication 11. Without appropriate precautions, there may be
potential difficulties ensuring electromagnetic compatibility in other
environments due to conducted as well as radiated disturbance.

This equipment is supplied as open-type equipment. It must be mounted within
an enclosure that is suitably designed for those specific environmental
conditions that will be present and appropriately designed to prevent personal
injury resulting from accessibility to live parts. The interior of the enclosure
must be accessible only by the use of a tool. Subsequent sections of this
publication may contain additional information regarding specific enclosure type
ratings that are required to comply with certain product safety certifications.

In addition to this publication, see:

• Industrial Automation Wiring and Grounding Guidelines, Rockwell
Automation publication 1770-4.1

• NEMA Standard 250 and IEC 60529, as applicable, for explanations of the
degrees of protection provided by different types of enclosure.

Preventing Electrostatic Discharge

ATTENTION: 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.

FLEX I/O AC Digital Input Modules 3

, for additional installation requirements.

Publication 1794-IN102C-EN-P - July 2015

4 FLEX I/O AC Digital Input Modules

North American Hazardous Location Approval

The following modules are North American Hazardous Location approved: 1794-IA8,
1794-IA8I, 1794-IA16.

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 nam eplate indicating
the hazardous location temperature code. When comb ining
products within a system, the most adverse temp erature code
(lowest "T" number) may be used to help determ ine the
overall 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 r emoved
or the area is known to be nonhazardous.
Secure any external connection s 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 batt eries, 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 en vironnements de
Classe I Division 2 Groupes A, B, C, D dangereux et no n
dangereux. Chaque produit est livré avec des marquages
sur sa plaque d'identification qui indiquent le code de
température pour les environnements dangereu x. Lorsque
plusieurs produits sont combinés dans un système, le code
de température le plus défavora ble (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 I,
Division 2.

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

Publication 1794-IN102C-EN-P - July 2015

FLEX I/O AC Digital Input Modules 5

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.

WARNING: 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.

WARNING: 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.

Publication 1794-IN102C-EN-P - July 2015

6 FLEX I/O AC Digital Input Modules

Installing Your AC Digital Input Module

3

7

1

2

6

4

Description Description

1 Keyswitch 5 Alignment bar

2 Terminal base 6 Groove

3 Flexbus connector 7 Latching mechanism

4 Module

The module mounts on a 1794 terminal base.

ATTENTION: During mounting of all devices, be sure that all debris (metal
chips, wire strands, etc.) is kept from falling into the module. Debris that falls
into the module could cause damage on power up.

1. Rotate the keyswitch (1) on the terminal base (2) clockwise to position 8 as
required for this type of module.

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.

5

Publication 1794-IN102C-EN-P - July 2015

FLEX I/O AC Digital Input Modules 7

3. Make sure the pins on the bottom of the module are straight so they will align
properly with the connector in the terminal base.

WARNING: 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.

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.

Connecting Wiring for the 1794-IA8

1. For 1794-TB2, 1794-TB3, or 1794-TB3S – Connect individual input wiring to
even numbered terminals on the 0-15 row (A) as indicated in the Wiring
Connections for 1794-IA8 table.

For 1794-TBN – Connect individual input wiring to numbered terminals on the
16-33 row (B) as indicated in the Wiring Connections for 1794-IA8 table.

2. For 1794-TB2 – Connect the associated 120V AC power lead (L1) of the input
device to the corresponding odd numbered terminals on the 0-15 row A for each
input as indicated in the Wiring Connections for 1794-IA8 table. (The odd
numbered terminals on row A are internally connected to 120V AC L1.)

For 1794-TB3 or 1794-TB3S – Connect the associated 120V AC power lead
(L1) of the input device to the corresponding odd numbered terminals on the
34-51 row (C) or to the corresponding terminal on row (C) for each input as
indicated in the Wiring Connections for 1794-IA8 table. (The odd numbered
terminals on row (A) and the terminals of row (C) are internally connected to
120V AC power L1.)

Publication 1794-IN102C-EN-P - July 2015

8 FLEX I/O AC Digital Input Modules

For 1794-TBN – Connect the associated 120V AC power lead (L1) of the input
device to the corresponding odd numbered terminal on the 34-51 row (C) for
each input as indicated in the Wiring Connections for 1794-IA8 table. (The
120V AC power terminals of row (C) are internally connected together.)

3. Connect 120V AC power (L1) to terminal 34 on the 34-51 row (C).

4. Connect 120V AC common (L2) to terminal 16 on the 16-33 row (B).

5. If daisychaining power to the next terminal base, connect a jumper from terminal
51 (+120V AC L1) on this base unit to terminal 34 on the next base unit.

6. If continuing AC common to the next base unit, conne ct a jumper from terminal
33 (120V common L2) on this base unit to terminal 16 on the next base unit.

Wiring Connections for 1794-IA8

1794-TB2, 1794-TB3, 1794-TB3S 1794-TBN

Input Input Terminal 120V AC Supply Input Terminal 120V AC Supply

Input 0 A-0 A-1

Input 1 A-2 A-3

Input 2 A-4 A-5

Input 3 A-6 A-7

Input 4 A-8 A-9

Input 5 A-10 A-11

Input 6 A-12 A-13

Input 7 A-14 A-15
A = Input terminals (Even numbered terminals 0...14)

B = Common terminals
C = Power terminals (C-34 and C-51 on 1794-TB2; C-34 to
C-51 on 1794-TB3 and 1794-TB3S)

(1)

A-1, 3, 5, 7, 9, 11, 13, and 15 on the 179 4-TB2, 1794-TB3, and 1794-TB3S are internally connected in the module to
120V AC L1.

(2)

C-1, 3, 5, 7, 9, 11, 13, and 15 on the 17 94-TBN are internally connected in the module to 120V AC L1.

(1)

/C-35

(1)

/C-36 B-2 C-3

(1)

/C-37 B-4 C-5

(1)

/C-38 B-6 C-7

(1)

/C-39 B-8 C-9

(1)

/C-40 B-10 C-11

(1)

/C-41 B-12 C-13

(1)

/C-42 B-14 C-15

B-0 C-1

B = Even numbered input terminals 0...14,
AC common terminals 16 and 33
C = Power terminals C-34 and C-51, and
odd numbered input terminals 1...15

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

Publication 1794-IN102C-EN-P - July 2015

FLEX I/O AC Digital Input Modules 9

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

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

16

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

34

Inputs

Commons

(1794-TB3 shown)

L2

L1

Voltage

A

B

C

L2

Connect 120V AC L1 power to terminal C-34
Connect 120V AC common L2 to terminal B-16

Use B-33 and C-51 for daisychaining to the next terminal base unit

L1

(Terminals C-35 thru C-50 not available on the 1794-TB2.)

16

0

1

2

3

4

5

6789101112

13

14

15

51

33

34

L1

L2

L1

L2

B

C

Even Numbered I/O Terminals 0 thru 14

Odd Numbered I/O Terminals 1 thru 15

(1794-TBN shown)

L1 = 120V AC - Connect to terminal C-34
L2 = 120V AC common - Connect to terminal B-16

Use B-33 and C-51 for daisychaining to the next terminal base unit

1794-TB2, 1794-TB3, and 1794-TB3S Terminal Base Wiring for
1794-IA8 and 1794-IA16

1794-TBN Terminal Base Wiring for 1794-IA8 and 1794-IA16

Connecting Wiring for the 1794-IA16

1. For 1794-TB3 or 1794-TB3S – Connect individual input wiring to numbered
terminals on the 0-15 row (A) as indicated in the Terminal Base Wiring for
1794-IA16 table.

For 1794-TBN – Connect individual input wiring to even numbered terminals
on the 16-33 row (B), and to the odd numbered terminals on the 34-51 row (C)
as indicated in the Terminal Base Wiring for 1794-IA16 table.

Publication 1794-IN102C-EN-P - July 2015

10 FLEX I/O AC Digital Input Modules

2. For 1794-TB3 or 1794-TB3S – Connect the associated 120V AC power lead
(L1) of the input device to the corresponding terminals on the 34-51 row (C) for
each input as indicated in the Terminal Base Wiring for 1794-IA16 table. (The
120V power terminals of row (C) are internally connected together.)

For 1794-TBN – An external terminal strip is needed to distribute 120V AC
power (L1) to each device.

3. Connect 120V AC power (L1)to terminal 34 on the 34-51 row (C).

4. Connect 120V AC common (L2) to terminal 16 on the 16-33 row (B).

5. If daisychaining power to the next terminal base, connect a jumper from terminal
51 (+120V AC L1) on this base unit to terminal 34 on the next base unit.

6. If continuing AC common to the next base unit, conne ct a jumper from terminal
33 (120V common L2) on this base unit to terminal 16 on the next base unit.

Terminal Base Wiring for 1794-IA16

Input Input Terminal

1794-TB3, 1794-TB3S

Input 0 A-0 B-0 C-35

Input 1 A-1 C-1 C-36

Input 2 A-2 B-2 C-37

Input 3 A-3 C-3 C-38

Input 4 A-4 B-4 C-39

Input 5 A-5 C-5 C-40

Input 6 A-6 B-6 C-41

Input 7 A-7 C-7 C-42

Input 8 A-8 B-8 C-43

Input 9 A-9 C-9 C-44

Input 10 A-10 B-10 C-45

Input 11 A-11 C-11 C-46

Input 12 A-12 B-12 C-47

Input 13 A-13 C-13 C-48

Input 14 A-14 B-14 C-49

Input Terminal
1794-TBN

120V AC Supply (L1)

(1)

Publication 1794-IN102C-EN-P - July 2015

FLEX I/O AC Digital Input Modules 11

IMPORTANT

Terminal Base Wiring for 1794-IA16

Input Input Terminal

1794-TB3, 1794-TB3S

Input 15 A-15 C-15 C-50

120V AC L1 Power terminals C-34 to C-51 (C-34 and C-51 on 1794-TBN) are internally connected

120V AC L2 Common terminals B-16 to B-33 (B-16 and B-33 for 1794-TBN) are internally connected

(1)

together. Connect 120V AC L1 to C-34.

together. Connect 120V AC common L2 to terminal B-16.

When using the 1794-TBN, an external terminal strip is needed to connect the 120V AC power connections.

Input Terminal
1794-TBN

120V AC Supply (L1)

Connecting Wiring for the 1794-IA8I

1. For 1794-TB2, 1794-T B3, or 1794-TB3S – Connect individual input wiring to
even numbered terminals on the 0-15 row (A) as indicated in the Wiring
Connections for 1794-IA8I table.

For 1794-TBN – Connect individual input wiring to even numbered terminals
0-14 on the 16-33 row (B) as indicated in the Wiring Connections for 1794-IA8I
table.

2. For 1794-TB2, 1794-TB3, or 1794-TB3S – Connect the associated 120V AC
common (L2) of the isolated supply to the corresponding odd numbered
terminals on the 0-15 row A for each input as indicated in the Wiring
Connections for 1794-IA8I table.

For 1794-TBN – Connect the associated 120V AC common lead (L2) of the
isolated supply to the corresponding odd numbered terminal 1-15 on the 34-51
row (C) as indicated in the Wiring Connections for 1794-IA8I table.

(1)

Individual isolated 120V AC L1 power leads must be run externally to each
of the input devices.

Publication 1794-IN102C-EN-P - July 2015

12 FLEX I/O AC Digital Input Modules

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

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

16

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

34

(1794-TB3 shown)

A

B

C

Connect Inputs to even numbered terminals on row (A)

Connect 120V AC common L2 to odd numbered terminals on row (A)

Wiring Connections for 1794-IA8I

1794-TB2, 1794-TB3, 1794-TB3S 1794-TBN

Input Input Terminal 120V AC L2

Common

Input 0 A-0 A-1 B-0 C-1

Input 1 A-2 A-3 B-2 C-3

Input 2 A-4 A-5 B-4 C-5

Input 3 A-6 A-7 B-6 C-7

Input 4 A-8 A-9 B-8 C-9

Input 5 A-10 A-11 B-10 C-11

Input 6 A-12 A-13 B-12 C-13

Input 7 A-14 A-15 B-14 C-15

A = Even numbered terminals 0...14 for customer
connections; corresponding odd numbered 120V AC
common L2 terminals 1...15 for customer connections from
isolated power supply.

Input Terminal 120V AC L2

Common

B = Even numbered terminals 0...14 for
customer connections;
C = Odd numbered 120V AC common L2
terminals 1...15 for customer connections
from isolated power supply.

1794-TB2, 1794-TB3, and 1794-TB3S Terminal Base Wiring for 1794-IA8I

Publication 1794-IN102C-EN-P - July 2015

FLEX I/O AC Digital Input Modules 13

1794-TBN Terminal Base Wiring for 1794-IA8I

Even Numbered I/O Terminals 0 thru 14

16

0

34

4

2

1

3

5

6789101112

13

14

33

B

51

15

C

Odd Numbered I/O Terminals 1 thru 15

(1794-TBN shown)

Connect Inputs to even numbered terminals on row (B)
L2 = 120V AC common - Connect to odd numbered terminals on row (C)

Publication 1794-IN102C-EN-P - July 2015

14 FLEX I/O AC Digital Input Modules

Configuring Your AC Input Module

Image Table Memory Map for the 1794-IA8 and 1794-IA8I Modules

Dec 1514131211109876543210

Oct 17161514131211107 6 5 4 3 2 1 0

Read I7 I6 I5 I4 I3 I2 I1 I0

Write Not used – set to 0 Filter Time FT 0...7

Where I = Input

FT = Input filter time

Image Table Memory Map for the 1794-IA16 Module

Dec 1514131211109876543210

Oct 17161514131211107 6 5 4 3 2 1 0

Read 1 I15I14I13I12I11I10I9I8I7I6I5I4I3I2I1I0

Write 3 Not used – set to 0 Input Filter FT

Where I = Input

FT = Input filter time

12...15

Setting the Input Filter Time

You can increase the input filter time (FT) for channels 00-07 (1794-IA8 and 1794-IA8I)
and channels 00-15 (1794-IA16) by setting the corresponding bits in the output image
table (complementary word) for the module.

Input Filter FT

0...11

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

O:010

Publication 1794-IN102C-EN-P - July 2015

FT = 12-15 FT = 0-11

1794-IA8, 1794-IA8I

1794-IA16

Dec.

FLEX I/O AC Digital Input Modules 15

1

00

76543

FLL

I:000

00

Fill File
Source

Destination
Length

#O:010

1

Write FT to complement
of input module.

Write filter time on system startup.

76 54 32 1 0

0

1

0

= 4 Octal or 4 Decimal

21 0

= 44 Octal or 36 Decimal

010100

1794-IA8

1794-IA16

1794-IA8I

For example, to increase the off-to-on filter time to 12 ms for all inputs at address rack 1,
module group 0, set bits and program as shown below.

To increase the filter time, set the bits according to the Input Filter Time table.

Input Filter Time

Bits Description

02 01 00 Filter Time –

05 04 03 Filter Time –

000Filter Time 0 (Default)256 μs 8.4 26.4 8.4 26.4 7.5 26.5

001Filter Time 1 512 μs 8.6 26.6 8.6 26.6 8 27

010Filter Time 2 1 ms 9 27 9 27 9 28

011Filter Time 3 2 ms 10 28 10 28 10 29

101Filter Time 4 4 ms 12 30 12 30 12 31

101Filter Time 5 8 ms 16 34 16 34 16 35

110Filter Time 6 16 ms 24 42 24 42 24.544

111Filter Time 7 32 ms 40 58 40 58 42 60.5

inputs 00...11

inputs 12...15

Selected
Filter Time

Maximum
Filter Time
(ms)
1794-IA8

Off
to
On

On
to
Off

Maximum
Filter Time
(ms)
1794-IA8I

Off

On

to

to

On

Off

Maximum
Filter Time
(ms)
1794-IA16

Off
to
On

Publication 1794-IN102C-EN-P - July 2015

On
to
Off

16 FLEX I/O AC Digital Input Modules

Specifications

Specifications – 1794-IA8, 1794-IA8I

Attribute 1794-IA8 1794-IA8I

Number of inputs 8, nonisolated 8, isolated
Recommended terminal base unit 1794-TBN, 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD,

On-state voltage, min 65V AC
On-state voltage, nom 120V AC
On-state voltage, max 132V AC
On-state current, min
On-state current, max 14.32 mA
Off-state voltage, max 43V AC
Off-state current, min 2.9 mA
Nominal input impedance 10.6 kΩ
Nominal input current 12 mA @ 120V AC
Isolation voltage 120V (continuous), Basic

Input filter time Refer to Input Filter Time table
FlexBus current 30 mA @ 5V DC
Power dissipation, max 4.5 W @ 132V AC
Thermal dissipation, max 15.3 BTU/hr @ 132V AC

(1)

AC inputs compatible with proximity switches wit h leakage ratings of I

(1)

1794-TB3K, 1794-TB3SK, 1794-TBNK

7.1 mA

120V (continuous), Basic

Insulation Type
Type tested @ 1250V AC for
60 s, between field side and
system
No isolation between
individual channels

Insulation Type
Type tested @ 1240V AC for
60 s, between field side and
system
Isolation between individual
channels.

< 2.5 mA and Ion minimum = 5 mA

leak

Specifications – 1794-IA16

Attribute Value

Number of inputs 16, nonisolated
Module location 1794-TB3, 1794-TB3S, 1794-TBN

On-state voltage, min 74V AC

1794-TBNK

Publication 1794-IN102C-EN-P - July 2015

(2)

, 1794-TB3K, 1794-TB3SK,

FLEX I/O AC Digital Input Modules 17

Specifications – 1794-IA16

Attribute Value

On-state voltage, nom 120V AC
On-state voltage, max 132V AC
On-state current, min

(1)

On-state current, max 14.81 mA
Off-state voltage, max 20V AC
Off-state current, min 2.9 mA
Nominal input impedance 10 kΩ
Nominal input current 12 mA @ 120V AC
Isolation voltage 120V (continuous), Basic Insulation Type

Input filter time Refer to Input Filter Time table
FlexBus current 20 mA
Power dissipation, max 6.4 W @ 132V AC
Thermal dissipation, max 21.8 BTU/hr @ 132V AC

(1)

AC inputs compatible with proximity switches wit h leakage ratings of I

(2)

Auxiliary terminal strips are required when using the 1794-TBN.

5.49 mA

Type tested @ 1264V AC for 60 s, between field side and system
No isolation between individual channels

< 2.5 mA and Ion minimum = 5 mA

leak

General Specifications

Attribute Value

Terminal base screw torque Determined by installed terminal base
Dimensions, approx. (H x W x D) 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.)
Indicators (field side indication) 8 yellow status indicators – 1794-IA8, 1794-IA8I

16 yellow status indicators – 1794-IA16

External AC power supply voltage, nom 120V AC
External AC power voltage range 65...132V AC – 1794-IA8, 1794-IA8I

74...132V AC – 1794-IA16

North American temperature code T4A
Keyswitch position 8

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18 FLEX I/O AC Digital Input Modules

General Specifications

Attribute Value

Enclosure type rating None (open-style)
Wire size Determined by installed terminala base
Wiring category

(1)

(1)

Use this conductor category information for planning conductor routing as described in Industrial Automation Wiring
and Grounding Guidelines, publication 1770-4.1 .

2 – on signal ports

Environmental Specifications

Attribute Value

Operating temperature IEC 60068-2-1 (Test Ad, Operating Cold),

Storage temperature IEC 60068-2-1 (Test Ab, Unpackaged Non-operating Cold),

Relative humidity IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):

Vibration IEC60068-2-6 (Test Fc, Operating):

Shock, operating IEC60068-2-27 (Test Ea, Unpackaged shock):

Shock, nonoperating IEC60068-2-27 (Test Ea, Unpackaged shock):

Emissions CISPR 11:

ESD immunity IEC 61000-4-2:

Radiated RF immunity IEC 61000-4-3:

IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):

-20…55 °C (-4…131 °F) – 1794-IA8, 1794-IA8I
0…55 °C (32…131 °F) – 1794-IA16

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)

5…95% non-condensing

5 g @ 10...500 Hz

30 g

50 g

Group 1, Class A (with appropriate enclosure)

6 kV contact discharges
8 kV air discharges

10V/m with 1 kHz sine-wave 80% AM from 80…2000 MHz
10V/m with 200 Hz 50% Pulse 100% AM @ 900 MHz
10V/m with 200 Hz 50% Pulse 100% AM @ 1890 MHz
1V/m with 1 kHz sine-wave 80% AM from 2000…2700 MHz –

1794-IA8, 1794-IA8I

1V/m with 1 kHz sine-wave 80% AM from 2000…2700 MHz –

1794-IA16

Publication 1794-IN102C-EN-P - July 2015

Environmental Specifications

Attribute Value

EFT/B immunity IEC 61000-4-4:

Surge transient immunity IEC 61000-4-5:

Conducted RF immunity IEC 61000-4-6:

±2 kV @ 5 kHz on power ports
±2 kV @ 5 kHz on signal ports

±1 kV line-line(DM) and ±2 kV line-earth(CM) on signal ports

10V rms with 1 kHz sine-wave 80% AM from 150 kHz…80 MHz

Certifications

FLEX I/O AC Digital Input Modules 19

Certifications (when
product is marked)

UL UL Listed Industrial Control Equipment.

CSA CSA Certified Process Control Equipment.

CE European Union 2004/108/EC EMC Directive, compliant with:

KC Korean Registration of Broadcasting and Communications Equipment,

EAC Russian Customs Union TR CU 020/2011 EMC Technical Regulation
RCM Australian Radiocommunications Act, compliant with:

(1)

See the Product Certification lin k at www.ab.com for Declarations of Conformity, Certificates, and other certification
details.

Valu e

(1)

See UL File E65584.

See CSA File LR54689C. – 1794-IA8, 1794-IA8I
See CSA File LR93701. – 1794-IA16

CSA Certified Process Control Equipment for Class I, Division 2 Group

A,B,C,D Hazardous Locations.
See CSA File LR69960C. – 1794-IA8, 1794-IA8I
See CSA File LR93701. – 1794-IA16

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)

European Union 2006/95/EC LVD, compliant with:

EN 61131-2; Programmable Controllers (Clause 11)

compliant with: Article 58-2 of Radio Waves Act, Clause 3

AS/NZS CISPR 11; Industrial Emissions

Publication 1794-IN102C-EN-P - July 2015

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Rockwell Automation provides technical information on the Web to assist you in using its products. At

http://www.rockwellautomation.com/support/

technical and application notes, sample code and links to software service packs, and a MySupport feature
that you can customize to make the best use of these tools.

For an additional level of technical phone support for installation, configuration and troubleshooting, we
offer TechConnect support programs. For more information, contact your local distributor or Rockwell
Automation representative, or visit http://www.rockwellautomation.com/support/

, you can find technical manuals, a knowledge base of FAQs,

.

Installation Assistance

If you experience a problem within the first 24 hours of installation, please review the information that's
contained in this manual. You can also contact a special Customer Support number for initial help in getting
your product up and running.

United States or Canada 1.440.646.3434
Outside United States or

Canada

Use the Worldwide Locator at

http://www.rockwellautomation.com/support/americas/phone_en.html

contact your local Rockwell Automation representative.

, or

New Product Satisfaction Return

Rockwell Automation tests all of its products to ensure that they are fully operational when shipped from
the manufacturing facility. However, if your product is not functioning and needs to be returned, follow
these procedures.

United States Contact your distributor. You must provide a Customer Support case number

Outside United States Please contact your local Rockwell Automation representative for the return

(call the phone number above to obtain one) to your distributor to complete
the return process.

procedure.

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Your comments will help us serve your documentation needs better. If you have any suggestions on how to
improve this document, complete this form, publication RA-DU002

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Trademarks not belonging to Rockwell Automation are property of their respective companies.

Publication 1794-IN102C-EN-P - July 2015

Supersedes Publication 1794-IN102B-EN-P - June 2004 Copyright © 2015 Rockwell Automation, Inc. All rights reserved.