Rockwell Automation 1794-IB16D, 1794-OB16D User Manual

Installation Instructions

FLEX I/O Digital Input and Output Modules
w/Diagnostics

1794-IB16D and 1794-OB16D

Important User Information

Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application, Installation and
Maintenance of Solid State Controls (Publication SGI-1.1 available from your local Rockwell
Automation sales office or online at http://www.ab.com/manuals/gi) describes some
important differences between solid state equipment and hard-wired electromechanical
devices. Because of this difference, and also because of the wide variety of uses for solid
state equipment, all persons responsible for applying this equipment must satisfy themselves
that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or
consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes.
Because of the many variables and requirements associated with any particular installation,
Rockwell Automation, Inc. cannot assume responsibility or liability 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

IMPORTANT

ATTENTION

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

• recognize the consequence

WARNING

ATTENTION

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.

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 (e.g. aluminum,
plastic, etc.) that can corrode, oxidize, or are poor conductors, can
result in improper or intermittent grounding.

North American Hazardous Location Approval

The following modules are North American Hazardous Location approved:
1794-IB16D and 1794-OB16D.

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 th e rating nameplate in dicating the hazardou s
location temp erature code. When com bining products 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 equi pment in
your system ar e subject to investigatio n by the local Authority
Having Jurisdiction at the time of installation.

WARNING

EXPLOSION HAZARD

• Do not discon nect equipment
unless power has been removed or
the area is kno wn to be
nonhazardous.

• Do not discon nect connections to
this equipmen t unless power ha s
been removed or the area is known
to be nonhazardous. Secure any
external co nnections that ma te to
this equipmen t by using screws,
sliding latches, th readed
connectors, o r other means provided
with this product.

• Substitution of components may
impair suitability for Class I, Division

2.

• If this produc t 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 e n environnements de Classe I
Division 2 Grou pes A, B, C, D dangere ux et non dangereux.
Chaque produit est livré avec des marquages sur sa plaque
d’identification qui indiquent le code de température pour les
environnements dangereux. Lorsque plusieurs produits sont
combinés dans un sys tème, le code de température le plus
défavorable (c ode de température le p lus faible) peut être
utilisé pour dé terminer le code de te mpérature global du
système. Les c ombinaisons d’équipem ents dans le système
sont sujettes à in spection par les autorités lo cales qualifiées
au moment de l’ installation.

AVERTISSEMENT

RISQUE D’EXPLOSION

• Couper le courant ou s’assurer que
l’environnemen t est classé non
dangereux avant de dé brancher
l'équipement.

• Couper le courant ou s'assurer que
l’environnemen t est classé non
dangereux avant de dé brancher les
connecteurs. Fixer tous les
connecteurs exter nes reliés à cet
équipement à l'aide de vis, loquets
coulissants, conn ecteurs filetés ou
autres moyens fournis avec ce pro duit.

• La substitution de composants peut
rendre cet équ ipement inadapté à une
utilisation en env ironnement de Cl asse
I, Division 2.

• S’assurer que l’environnement est
classé non dan gereux avant de
changer les pile s.

ATTENTION

Environment and Enclosure

This equipment is intended for use in a Pollution Degree 2
industrial environment, in overvoltage Category II applications
(as defined in IEC publication 60664-1), at altitudes up to 2000
meters 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.

See NEMA Standards publication 250 and IEC publication
60529, as applicable, for explanations of the degrees of
protection provided by different types of enclosure. Also, see
the appropriate sections in this publication, as well as the
Allen-Bradley publication 1770-4.1 ("Industrial Automation
Wiring and Grounding Guidelines"), for additional installation
requirements pertaining to this equipment.

ATTENTION

Preventing 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.

• If available, use a static-safe workstation.

FLEX I/O is a trademark of Rockwell Automation, Inc. Publication 1794-IN096B-EN-P - February 2004

2

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

+

+

C

N

Installing Your Digital Input or Output Module

3

4

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.

The input module mounts on a 1794-TB32 or -TB32S terminal base. The
output module mounts on a 1794-TB2, -TB3 or -TB3S terminal base.

1. Rotate the keyswitch (1) on the terminal base (2) clockwise to position
2 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 termbase/adapter. You cannot install
the module unless the connector is fully extended.

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

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-IB16D (using 1794-TB32 or -TB32S
terminal base)

1. Connect individual input wiring (IN00-IN15) to terminals 0 thru 15
on the 0-15 row (A) as indicated in the table below.

2. Connect individual Sensor Power wiring (sensor power 0 thru 15) to
terminals 17 thru 32 on the 16-33 row (B) as indicated in the table
below. Do not connect to terminals 16 or 33.

3. Connect the associated +V2 dc power lead of the input device to the
corresponding terminal on the 34-51 row (C) for each input as
indicated in the table below. (The +V2 power terminals of row (C) are
internally connected together.)

4. Connect the associated input common (3-wire devices only) to the
corresponding terminal on the 34-51 row. (C) for each input as
indicated in the table below. (Commons are internally connected
together.)

5. Connect +V dc power to pin 43 (+V) on the 34-51 row (C).

6. Connect -V dc common to pin 44 (COM2) on the 34-51 row (C).

7. If daisychaining input wiring power to the next terminal base, connect

a jumper from terminal 49 (+V dc) on this base unit to the power
terminal on the next base unit (refer to the installation instructions for
the next terminal base unit).

8. If continuing input wiring common to the next base unit, connect a
jumper from terminal 50 (common) on this base unit to the common

7

1

2

6

5

terminal on the next base unit (refer to the installation instructions for
the next terminal base unit).

1794-TB32 and -TB32S Terminal Base Wiring for the
1794-IB16D

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

16

NC NC

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

34

NC

+V1 COM1 +V1 COM1 +V1 COM1 +V1 COM1 +V2 COM2 +V2 COM2 +V2 COM2 +V2 COM2 NC

V2 = Terminals 43, 45, 47 and 49 -

Voltage applied to Inputs 0-15 and Sensor power 0-15

OM1, COM2 = Terminals 36, 38, 40, 42, 44, 46, 48 and 50 -

Common for inputs 0 thru 15 and sensor power 0 thru 15

C = No connections (terminals 16, 33, 34 and 51)
V1 = Terminals 35, 37, 39 and 41 (not used)

Input Terminals 0-15

Sensor Power Terminals 0-15

(1794-TB32 shown)

A

B

C

Wiring for 1794-IB16D (use with 1794-TB32 or -TB32S terminal
base units)

Input Input

Terminal

IN 00 A-0 B-17 -V common
IN 01 A-1 B-18
IN 02 A-2 B-19
IN 03 A-3 B-20
IN 04 A-4 B-21
IN 05 A-5 B-22
IN 06 A-6 B-23
IN 07 A-7 B-24
IN 08 A-8 B-25
IN 09 A-9 B-26
IN 10 A-10 B-27
IN 11 A-11 B-28
IN 12 A-12 B-29
IN 13 A-13 B-30
IN 14 A-14 B-31
IN 15 A-15 B-32
+V2 dc

power
COM dc

Return

1

use input, sensor power and common terminals.

Power terminals 43, 45, 47 and 49 (power terminals are internally connected
together in the module)

Common terminals 36, 38, 40, 42, 44, 46, 48 and 50 (common terminals are
internally connected together in the module)

3-wire devices only. 2-wire devices use input and sensor power terminals; 3-wire devices

Sensor
Power
Ter m in al

Common

connected to
terminals 36, 38, 40,
42, 44, 46, 48 and
50

1

Supply

+V2 connected to
terminals 43, 45,
47 and 49

Connecting Wiring for the 1794-OB16D (using 1794-TB2, -TB3 or

-TB3S terminal base)

1. Connect individual output wiring to numbered terminals on the 0-15
row (A) as indicated in the table below.

2. Connect the associated common for each output to the corresponding
terminal on the 16-33 row (B) as indicated in the table below. (The
common terminals of row (B) are internally connected together.)

3. Connect +V dc power to terminal 34 on the 34-51 row (C). (The
power terminals of row (C) are internally connected together.)

4. Connect dc common (COM) to terminal 16 on the 16-33 row (B).

5. If daisychaining 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.

Publication 1794-IN096B-EN-P - February 2004