Rockwell Automation 1734-IB4D User Manual

Installation Instructions

POINT I/O 24V dc 4-channel Digital Diagnostics Input Module

Catalog Number 1734-IB4D

Topic Page

Important User Information 2

Prevent Electrostatic Discharge 3

Environment and Enclosure 4

North American Hazardous Location Approval 5

About the Module 6

Before You Begin 8

Understand Short-circuit Detection 8

Understand Open-wire Detection 9

Install the Mounting Base 9

Install the Module 11

Install the Removable Terminal Block 15

Wire the Module 15

Configure the Module 18

Interpret the LED Indicators 20

Remove a Mounting Base 23

Specifications 24

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2 POINT I/O 24V dc Digital Diagnostics Input Module

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://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.

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.

) describes some important differences between solid state

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

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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 to identify a
hazard, avoid a hazard and recognize the consequences.

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

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

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POINT I/O 24V dc Digital Diagnostics Input Module 3

Prevent Electrostatic Discharge

ATTENTION

ATTENTION

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.

• 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 safety extra-low
voltage (SELV) or protected extra-low voltage (PELV).

POINT I/O is grounded through the DIN rail to chassis ground. Use zinc
plated, yellow-chromate steel DIN rail to be sure of proper grounding.
The use of other DIN rail materials, such as aluminum and 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 (7.87 in.) and use end-anchors appropriately.

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4 POINT I/O 24V dc Digital Diagnostics Input Module

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

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POINT I/O 24V dc Digital Diagnostics Input Module 5

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 sui table 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 ind icating
the hazardous location temperatu re code. When
combining products within a system, the most adverse
temperature code (lowest “T” number) may be used to
help determine the overall temperature cod e of the
system. Combinations of equipment in your syst em are
subject to investigation by the local Authority Having
Jurisdiction at the time of installa tion.

EXPLOSION HAZARD -

WARNING

• 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 D ivision 2
Groupes A, B, C, D dangereux et non danger eux. Chaque
produit est livré avec des marquages sur sa plaque
d’identification qui indiquent le co de de température pour les
environnements dangereux. Lorsque plusieurs prod uits 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 temp érature 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 1, Division 2.

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

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6 POINT I/O 24V dc Digital Diagnostics Input Module

About the Module

This module is a 4-channel 24V dc input module with short-circuit
and open-wire diagnostics.

See the figures to familiarize yourself with major parts of the module,
noting that the wiring base assembly is one of the following, with the
module not being compatible with 1734-TB3, 1734-TB3S, 1734-TOP3,
and 1734-TOP3S bases:

• 1734-TB POINT I/O two-piece terminal base, which includes
the 1734-RTB removable terminal block

• 1734-TOP or 1734-TOPS POINT I/O one-piece terminal bass

odule

M

Status

ork

Netw

:

Status

E

D

Module Locking
Mechanism

Module Wiring Diagram

O

N

Slide-in Writable Label

0

1

2

3

Insertable I/O Module

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DIN Rail Locking Screw (orange)

Mechanical Keying
(orange)

Interlocking Side Pieces

Mounting Base

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Removable Terminal
Block Handle

Removable
Terminal Block

POINT I/O 24V dc Digital Diagnostics Input Module 7

Module Locking
Mechanism

Module Wiring Diagram

DIN Rail Locking
Screw (orange)

Mechanical
Keying (orange)

Interlocking
Side Pieces

Slide-in Writable Label

Insertable
I/O Module

Handle

One-piece
Terminal
Base with
Screw or
Spring
Clamp

44221

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8 POINT I/O 24V dc Digital Diagnostics Input Module

Before You Begin

The module supports remove and insert under power, auto-address,
and auto-baud in compliance with the POINTBus backplane. Each
input is a sinking dc input with short-circuit and open-wire detection.
The sensor source voltage is derived from the user auxiliary power
and used as I/O power.

Understand Short-circuit Detection

The sensor source voltage (SSV) for each input is protected against
short circuits. For currents above 200 mA, a fault signal is issued and
the input LED indicator is illuminated solid red. A thermally-actuated
smart-power device or PTC is used as the protection means. On a
per-input basis, the circuit and produced data automatically reset and
SSV energizes upon removal of the short circuit. An individual fault
signal is issued for each shorted SSV condition.

The shorted input LED indicator illuminates red to denote
short-circuit fault status.

See the section on interpreting LED indicators for related information.

When the SSV is loaded to the maximum rated current of 50 mA, a
voltage drop of as much as 2.5V dc can exist between the user
auxiliary power and the SSV connection. For example, for a supply of
10V dc to a sensor with power derived from the SSV, a supply of

12.5V dc is needed at the auxiliary power connection.

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POINT I/O 24V dc Digital Diagnostics Input Module 9

Understand Open-wire Detection

Sensor source voltage (SSV) current for each input is monitored.
Monitoring is accomplished in the SSV leg to accommodate the
largest number of sensors possible. For currents below 0.5 mA, a fault
signal is issued and the input's LED indicator blinks red. On a
per-input basis, the circuit and produced data automatically reset
upon removal of the open-wire condition. See the information about
interpreting LED indicators for related information.

By using a configuration tool, you can disable the open- wire
diagnostics on an input-point basis to keep unused input indicators
from turning red and signaling a fault when an input is not in use.
Enabling or disabling input-point level open-wire diagnostics is
implemented via the module’s EDS file, GSD file, or Logix profile and
its firmware.

You can also disable all the open-wire diagnostics, using a single
entry via the software user interface. The default configuration has
all four input channels’ open-wire indication enabled.

If a sensor with a dry contact output is used, wire one side of the
contact to the SSV terminal for the corresponding input. Wire the
other side of the contact to the input. Additionally, place a shunt
resistor in parallel with the contact, at the sensor, to cause greater
than 0.5 mA to be drawn through the SSV terminal at all times.

Install the Mounting Base

To install the mounting base on the DIN rail, proceed as follows.

1. Position the mounting base vertically above the installed units,

for example, adapter, power supply, or existing module.

2. Slide the mounting base down so that the interlocking side

pieces engage the adjacent module or adapter.

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