Allen-Bradley ControlLogix 1756-IG16 User manual

Publication 1756-IN584B-EN-P - August 2003
Installation Instructions
ControlLogix
TTL Input Module
Catalog Number 1756-IG16
Obtain a User Manual
This product also has a user manual (pub. no. 1756-UM058). To view
it, visit www.ab.com/manuals or www.theautomationbookstore.com.
To purchase a manual, you can:
•contact your distributor or Rockwell Automation representative
•visit www.theautomationbookstore.com and place an order
•call 800.963.9548 (USA/Canada) or 001.320.725.1574 (outside
USA/Canada)
To: See page:
Identify the Module Components 6
Note the Power Requirements 7
Understand the Low-True Format 7
Install the Module 8
Key the Module and Removable Terminal Block/Interface Module 9
Wire the Removable Terminal Block 10
Wire the Module 11
Assemble the Removable Terminal Block and the Housing 13
Install the Removable Terminal Block onto the Module 13
Check the Indicators 14
Remove the Removable Terminal Block from the Module 15
Remove the Module 15
See Specifications 16
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2ControlLogix TTL Input Module
Publication 1756-IN584B-EN-P - August 2003
Important User Information
Because of the variety of uses for the products described in this publication, those
responsible for the application and use of these products must satisfy themselves that all
necessary steps have been taken to assure that each application and use meets all
performance and safety requirements, including any applicable laws, regulations, codes and
standards. In no event will Rockwell Automation be responsible or liable for indirect or
consequential damage resulting from the use or application of these products.
Any illustrations, charts, sample programs, and layout examples shown in this publication
are intended solely for purposes of example. Since there are many variables and
requirements associated with any particular installation, Rockwell Automation does not
assume responsibility or liability (to include intellectual property liability) for actual use
based upon the examples shown in this publication.
Allen-Bradley publication SGI-1.1, Safety Guidelines for the Application, Installation and
Maintenance of Solid-State Control (available from your local Rockwell Automation office),
describes some important differences between solid-state equipment and electromechanical
devices that should be taken into consideration when applying products such as those
described in this publication.
Reproduction of the contents of this copyrighted publication, in whole or part, without
written permission of Rockwell Automation, is prohibited.
Throughout this publication, notes may be used to make you aware of safety considerations.
The following annotations and their accompanying statements help you to identify a
potential hazard, avoid a potential hazard, and recognize the consequences of a potential
hazard:
!
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.
IMPORTANT Identifies information that is critical for successful application and
understanding of the product.

ControlLogix TTL Input Module 3
Publication 1756-IN584B-EN-P - August 2003
Environment and Enclosure
Prevent Electrostatic Discharge
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 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.
NOTE: 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
!
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.
When not in use, store the equipment in appropriate static-safe packaging.
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4ControlLogix TTL Input Module
Publication 1756-IN584B-EN-P - August 2003
Removal and Insertion Under Power
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.
North American Hazardous Location Approval
!
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.
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.

ControlLogix TTL Input Module 5
Publication 1756-IN584B-EN-P - August 2003
!
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.
The following information applies when
operating this equipment in hazardous
locations:
Informations sur l’utilisation de cet équipement
en environnements dangereux :
Allen-Bradley Spares

6ControlLogix TTL Input Module
Publication 1756-IN584B-EN-P - August 2003
Identify the Module Components
You received the following components with your order:
•1756-IG16 module
•Removable Terminal Block (RTB) door label
If you did not receive these components, contact your local
distributor Rockwell Automation sales office.
This module mounts in a 1756 chassis and uses a separately-ordered
RTB or a Bulletin 1492 Interface Module (IFM)(1) to connect all
field-side wiring. This module uses one of the following RTBs:
•1756-TBNH 20 position NEMA RTB
•1756-TBSH 20 position Spring Clamp RTB
Use an extended-depth cover (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 wiring.
(1) The Bulletin 1492 IFM may not be used in any application that requires agency certification of the
ControlLogix®system. Use of the IFM violates the UL, CSA and FM certifications of this product.
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.

ControlLogix TTL Input Module 7
Publication 1756-IN584B-EN-P - August 2003
Note the Power Requirements
This module receives power from the 1756 chassis power supply and
requires 2 sources of power from the ControlLogix backplane:
•110mA @ 5.1V dc
•2mA @ 24V dc
Add this current/power value (0.61W) to the requirements of all other
modules in the chassis to prevent overloading the power supply.
Understand the Low-True Format
This module requires both (+) and (-) connections from a 5V dc
power supply to function. The module also operates in a low-true
format. Inputs may be in the ON or OFF state depending on the
voltage applied to the input.
•-0.2V to 0.8V dc = Input guaranteed to be in ON state
•0.8 to 2.0V dc = Input state not Guaranteed
•2.0 to 5.5V dc = Input guaranteed to be in OFF state
The graphic below shows the input state in each voltage range.
IMPORTANT This module requires power from a user-provided +5V
dc power supply in addition to requiring power from
the ControlLogix backplane. The user-provided power
supply is used for the transmission of TTL signals.
(Measure voltage from common
terminal to input terminal.)
IN
On state Input state not guaranteed Off state
-0.2V dc 0.8V dc 2.0V dc 5.5V dc
TTL inputs are inverted (-0.2V to +0.8V dc = low voltage = True = On
COM
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8ControlLogix TTL Input Module
Publication 1756-IN584B-EN-P - August 2003
Install the Module
You can install or remove the module while chassis power is applied.
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.
1. Align the circuit board with the top and bottom chassis guides.
2. Slide the module into chassis until module locking tabs click.
!
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.
20861–M
Printed
Circuit
Board
Locking tab

ControlLogix TTL Input Module 9
Publication 1756-IN584B-EN-P - August 2003
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 positions on the module that correspond to 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.
2. Push the band until it snaps in place.
3. To key the RTB or IFM, insert the wedge-shaped tab with
rounded edge first, as shown.
4. Push the tab until it stops.
Reposition the tabs to rekey future module applications.
20850–M
U-shaped
bands
20851–M
Wedge-shaped tab
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10 ControlLogix TTL Input Module
Publication 1756-IN584B-EN-P - August 2003
Wire the Removable Terminal Block
Wire the RTB with a 5/16 inch (8mm) maximum flat-bladed
screwdriver before installing it onto the module.
Be sure that power is removed or the area is nonhazardous before
proceeding.
ATTENTION
!
I/O and power cable lengths should be less than 10
meters.
!
WARNING When you connect or disconnect the Removable
Terminal Block (RTB) while field side power is on, an
electrical arc can occur. This could cause an explosion in
hazardous location installations.
20863–M
Spring Clamp RTB
A. Strip 7/16 inch (11mm) maximum
length of wire.
B. Insert the screwdriver into the
inner hole of the RTB.
C. Insert the wire into the open terminal
and remove the screwdriver.
NEMA Screw RTB
A. Strip 5/16 inch (8mm) maximum length
of wire.
B. Turn the terminal screw counterclockwise.
C. Wrap wire around the terminal.
D. Turn the terminal screw clockwise.
42516