A-BControlLogix 32-point DC (10…31.2V) Input Module, Series B

ControlLogix 32-point DC (10…31.2V) Input Module, Series B Catalog Number 1756 - IB32, Series B

Topic Page

Important User Information 2

Environment and Enclosure 3

Preventing Electrostatic Discharge 4

Removal and Insertion Under Power 4

European Hazardous Location Approval 5

North American Hazardous Location Approval 6

Before You Begin 7

Module Components 7

Power Requirements 8

Install the Module 8

Key the Module and Removable Terminal Block/Interface Module 9

Wire the Module 11

Wire the Removable Terminal Block (RTB) 12

Assemble the Removable Terminal Block (RTB) and the Housing 13

Install the Removable Terminal Block (RTB) onto the Module 14

Status Indicators 15

Remove the Removable Terminal Block (RTB) from the Module 16

Remove the Module 17

Specifications 18

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) 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, when necessary, we use notes to make you aware of safety considerations

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 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, 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.

Preventing Electrostatic Discharge

Removal and Insertion Under Power

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.

WARNING 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. Repeated electrical arcing causes excessive wear to 

contacts on both the module and its mating connector. Worn contacts may 

create electrical resistance that can affect module operation.

ATTENTION 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

European Hazardous Location Approval

Consider the following if you install the module in a European Zone 2 

location.

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 • 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.

ATTENTION This equipment is not resistant to sunlight or other sources of UV 

radiation.

North American Hazardous Location Approval

The following information applies when 

operating this equipment in hazardous 

locations:

Informations sur l’utilisation de cet 

équipement en environnements dangereux:

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 products within a system, the most 

adverse temperature code (lowest ‘T’ number) 

may be used to help determine 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.

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 dangereux 

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 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.

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.

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.

About the Module

ControlLogix I/O modules mount in a ControlLogix chassis and require 

either a removable terminal block (RTB) or a 1492 interface module (IFM)(1)

to connect all field-side wiring.

Before You Begin

Before you install your I/O module, you should:

• identify the module components.

• note the power requirements.

Module Components

You received these components with your order:

• 1756-IB32 module

• Removable terminal block (RTB) door label

If you did not receive these components, contact your local distributor or 

Rockwell Automation sales office.

This module uses one of these RTBs:

• 1756-TBCH 36-position cage clamp RTB

• 1756-TBS6H 36-position spring clamp RTB

Use an extended-depth cover (catalog number 1756-TBE) for applications 

with heavy gauge wiring or requiring additional routing space. When using an 

IFM, consult the documentation that came with it to connect the wiring.

(1) The ControlLogix system has been agency certified by using only the ControlLogix RTBs (for example, 

1756-TBCH, 1756-TBNH, 1756-TBSH, and 1756-TBS6H). Any application that requires agency 

certification of the ControlLogix system by using other wiring termination methods may require 

application-specific approval by the certifying agency.

IMPORTANT Before you install your module, you should:

• install and ground a 1756 chassis and power supply.

• order and receive an RTB or IFM, and its components, for your 

application.

Power Requirements

This module receives power from the 1756-chassis power supply and requires 

two sources of power from the ControlLogix backplane.

• 120 mA at 5.1V DC

• 2 mA at 24V DC

Add this current/power value (0.66 W) to the requirements of all other 

modules in the chassis to prevent overloading the power supply. 

Install the Module

You can install or remove the module while chassis power is applied.

1. Align the circuit board with the top and bottom chassis guides.

WARNING 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. Repeated electrical arcing causes excessive wear to 

contacts on both the module and its mating connector. Worn contacts may 

create electrical resistance that can affect module operation.

2. Slide the module into the chassis until the module locking tabs click.

Key the Module and Removable Terminal Block/Interface Module Use the wedge-shaped keying tabs and U-shaped keying bands to prevent connecting the wrong wires to your module. Key the positions on the module that correspond to the unkeyed positions on the RTB. For example, if you key the first position on the module, leave the first position on the RTB unkeyed.

1. To key the module, insert the U-shaped band, as shown.

   

   3. To key the RTB or IFM, insert the wedge-shaped tab with rounded edge first, as shown.

   
   

4 ControlLogix 32-point DC (10…31.2V) Input Module, Series B Publication 1756-IN027F-EN-P - October 2008 Install the Removable Terminal Block (RTB) onto the Module Before proceeding with RTB installation, verify: • power is removed or the area is nonhazardous. • field-side wiring of the RTB has been completed. • the RTB housing is snapped in place on the RTB. • the RTB housing is closed. • the locking tab at the top of the module is unlocked. 1. Align the side, top, and bottom guides. 2. Press quickly and evenly to seat the RTB until the latches snap into place. 3. Slide the locking tab down. WARNING When you connect or disconnect the removable terminal block (RTB) with field-side power applied, 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.

ControlLogix 32-point DC (10…31.2V) Input Module, Series B 

Publication 1756-IN027F-EN-P - October 2008

Remove the Removable Terminal Block (RTB) from the Module

If you must remove the module, you must remove the RTB first.

Before removing the module, you must remove the RTB.

1. Unlock the locking tab at the top of the module.

2. Open the RTB door and pull the RTB off the module.

WARNING 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. Repeated electrical arcing causes excessive wear to 

contacts on both the module and its mating connector. Worn contacts may 

create electrical resistance that can affect module operation.