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
Allen-Bradley Spares

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.
Allen-Bradley Spares

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
Allen-Bradley Spares

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
Allen-Bradley Spares

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

ControlLogix TTL Input Module 11
Publication 1756-IN584B-EN-P - August 2003
Wire the Module
You can only connect wiring to your module with an RTB or IFM.
Figure 1 1756-IG16 Wiring Diagram
1
3
5
7
9
19
17
15
13
11
2
4
6
8
10
20
18
16
14
12
IN-1
IN-3
IN-5
IN-7
DC-0(+)
IN-0
IN-2
IN-4
IN-6
DC COM 0
IN-9
IN-11
IN-13
IN-15
DC-1(+)
IN-8
IN-10
IN-12
IN-14
DC COM 1
NOTES:
1. We recommend you use this diagram for applications that do not
require CE compliance. For a CE-compliant diagram, see page 12.
2. Do not connect more than two wires to any single terminal.
3. This example shows devices wired to only one of two groups on
the module. You can make connections to the second group on
terminals 11-20.
5V dc
+ DC
– DC
Allen-Bradley Spares

12 ControlLogix TTL Input Module
Publication 1756-IN584B-EN-P - August 2003
Figure 2 1756-IG16 Wiring Diagram for CE-Compliant (and High
Noise) Applications
After completing field-side wiring, secure the wires in the strain relief
area with a cable-tie.
1
3
5
7
9
19
17
15
13
11
2
4
6
8
10
20
18
16
14
12
IN-1
IN-3
IN-5
IN-7
DC-0(+)
IN-0
IN-2
IN-4
IN-6
DC COM 0
IN-9
IN-11
IN-13
IN-15
DC-1(+)
IN-8
IN-10
IN-12
IN-14
DC COM 1
GENERAL NOTES:
1. We recommend you use Belden 8761 cable where shielded cables
are shown.
2. Do not connect more than two wires to any single terminal.
3. This example shows devices wired to only one of two groups on the
module. You can make connections to the second group on
terminals 11-20.
CE REQUIREMENT NOTES:
1. DC power wire and I/O wire should not exceed 10m (30ft) in length.
2. The 0.01µF capacitors shown above must be rated for 2000V dc.
Capacitor
0.01µF typical
(See notes below)
5V dc power
DC power wire
I/O wire
+
–
I/O wire
TTL input
device
+
–

ControlLogix TTL Input Module 13
Publication 1756-IN584B-EN-P - August 2003
Assemble the Removable Terminal Block and the Housing
Install the Removable Terminal Block onto the Module
Before proceeding with RTB installation, make certain:
•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.
!
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.
20852-M
Groove
Groove
Side edge of the RTB
Side edge of the RTB
Strain relief area
1. Align the grooves at the bottom of the housing with the side edges of the RTB.
2. Slide the RTB into the housing until it snaps into place.
20853–M 20854–M
Module
guide
RTB guides
Locking tab
1. Align the side and top, bottom guides. 2. Press quickly and evenly to seat the RTB
until the latches snap into place.
3. Slide the locking tab down.
Allen-Bradley Spares

14 ControlLogix TTL Input Module
Publication 1756-IN584B-EN-P - August 2003
Check the Indicators
The indicators show individual I/O status (yellow) for each point and
a bi-colored LED for module "OK" (red/green).
During power up, an indicator test is done and the following occurs:
•"OK" indicator turns red for 1 second and then turns to
flashing green if it has passed the self-test.
•I/O status indicators turn ON for a maximum of 2 seconds and
then turn OFF.
This completes installation of the module. Use the following
information to remove the module, if necessary.
Indicator: Displaying: Means: Take this action:
OK Steady green
light
The inputs are being multicast
and in normal operating state.
None
OK Flashing
green light
The module has passed
internal diagnostics but is not
multicasting inputs.
Configure the module with
RSLogix 5000 programming
software.
OK Flashing red
light
Previously established
communication has timed out.
Check controller and chassis
communication.
OK Steady red
light
An unrecoverable error has
occurred on the module.
Replace the module.
I/O State Yellow The input is active. None
20945-M
DC INPUT
ST012 345 67
S T 8 9 10 11 12 13 14 15
O
K

ControlLogix TTL Input Module 15
Publication 1756-IN584B-EN-P - August 2003
Remove the Removable Terminal Block from the Module
If you need to remove the module, you must remove the RTB first.
Before removing the module, you must remove the RTB.
Remove 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.
20855–M
2. Open the RTB door and pull
the RTB off the module.
1. Unlock the locking tab at
the top of the module.
42517
1. Push in top and bottom locking tabs. 2. Pull module out of the chassis.
20856–M 20857–M
Allen-Bradley Spares

16 ControlLogix TTL Input Module
Publication 1756-IN584B-EN-P - August 2003
1756-IG16 Specifications
Number of Inputs 16 (8 points/common)
Module Location 1756 ControlLogix Chassis
Backplane Current 110mA @ 5.1V dc & 2mA @ 24V dc
Backplane Power 0.61W
Maximum Power Dissipation
(Module)
1.4W @ 60oC
Thermal Dissipation 4.8 BTU/hr @ 60oC
Operating Voltage 4.5 to 5.5V dc source
50mV P-P ripple maximum
Voltage Category 5V dc TTL (Low = True)(1)
Off-State Voltage 2.0V dc maximum
Off-State Current 4.1mA maximum
Input Impedance 1.4KΩminimum
1.5kΩtypical
Low-True Format The module operates with the following definitions of
ON and OFF states:
-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
For more information, see page 7.
Input Current 3.7mA @ 5V dc nominal
4.1mA @ 5V dc maximum
Input Delay Time
OFF to ON
(5V to 0V dc transition)
ON to OFF
(0V to 5V dc transition)
Hardware Delay (270µs nominal/450µs maximum) +
Input Filter Time (User selectable time: 0ms, 1ms or 2ms)
Hardware Delay (390µs nominal/700µs maximum) +
Input Filter Time (User selectable time: 0ms, 1ms, 2ms,
9ms or 18ms)

ControlLogix TTL Input Module 17
Publication 1756-IN584B-EN-P - August 2003
Diagnostic Functions
Change of State
Timestamp of Inputs
Software configurable
+/- 200µs
Cyclic Update Time User-selectable (100µs minimum to 750ms maximum)
Reverse Polarity Protection None - Damage to circuitry could result
Isolation Group 2 groups of 8
Isolation Voltage
Group to group
User to system
250V maximum continuous
250V maximum continuous
Field Wiring Arm and Housing 20-position RTB (1756-TBNH or 1756-TBSH)(2)
RTB Screw Torque (NEMA
clamp)
7 to 9 inch-pounds (0.8 to 1Nm) maximum
Module Keying (Backplane) Software configurable
RTB Keying User-defined mechanical keying
Conductors Wire Size
Category
#22 to #14 AWG (0.324 to 2.08 sq. mm) stranded(1)
3/64 inch (1.2mm) insulation maximum
2(3)
Screwdriver Blade Width for
RTB
5/16 inch (8mm) maximum
Environmental Conditions
Operating
Temperature
IEC 60068-2-1 (Test Ad, Operating Cold),
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
0 to 60°C (32 to 140°F)
Storage Temperature IEC 60068-2-1 (Test Ab, Un-packaged Non-operating
Cold),
IEC 60068-2-2 (Test Bb, Un-packaged Non-operating Dry
Heat),
IEC 60068-2-14 (Test Na, Un-packaged Non-operating
Thermal Shock):
–40 to 85°C (–40 to 185°F)
Allen-Bradley Spares

18 ControlLogix TTL Input Module
Publication 1756-IN584B-EN-P - August 2003
Relative Humidity IEC 60068-2-30 (Test Db, Un-packaged Non-operating
Damp Heat):
5 to 95% non-condensing
Vibration IEC60068-2-6 (Test Fc, Operating):
2g @ 10-500Hz
Operating Shock IEC60068-2-27 (Test Ea, Unpackaged shock):
30g
Non-Operating Shock IEC60068-2-27 (Test Ea, Unpackaged shock):
50g
Emissions CISPR 11:
Group 1, Class A
ESD Immunity IEC 61000-4-2:
4kV contact discharges
8kV air discharges
Radiated RF Immunity IEC 61000-4-3:
10V/m with 1kHz sine-wave 80%AM from 80MHz to
1000MHz
EFT/B Immunity IEC 61000-4-4:
±1kV at 5kHz on power ports
±1kV at 5kHz on signal ports
Conducted RF
Immunity
IEC 61000-4-6:
10Vrms with 1kHz sine-wave 80%AM from 150kHz to
80MHz
Enclosure Type Rating None (open-style)

ControlLogix TTL Input Module 19
Publication 1756-IN584B-EN-P - August 2003
Certifications:
(when product is marked)
UL UL Listed Industrial Control Equipment
CSA CSA Certified Process Control Equipment
CSA CSA Certified Process Control Equipment for Class
I, Division 2 Group A,B,C,D Hazardous Locations
CE(4) European Union 89/336/EEC EMC Directive,
compliant with:
EN 50082-2; Industrial Immunity
EN 61326; Meas./Control/Lab., Industrial
Requirements
EN 61000-6-2; Industrial Immunity
EN 61000-6-4; Industrial Emissions
C-Tick(4) Australian Radiocommunications Act, compliant
with:
AS/NZS CISPR 11; Industrial Emissions
(1) TTL inputs are inverted (-0.2 to +0.8 = low voltage = True = On.) Use a NOT instruction in your program
to convert to traditional True - High logic.
(2) Maximum wire size will require extended housing - 1756-TBE.
(3) Refer to publication 1770-4.1 Industrial Automation Wiring and Grounding Guidelines.
(4) See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates, and
other certification details.
Allen-Bradley Spares

Publication 1756-IN584B-EN-P - August 2003 PN 957831-33
Supersedes Publication 1756-IN584A-EN-P-EN-P - July 2003 Copyright © 2003 Rockwell Automation. All rights reserved. Printed in the U.S.A.
Rockwell Automation Support
Rockwell Automation provides technical information on the web to assist you
in using our products. At http://support.rockwellautomation.com, you can
find technical manuals, a knowledge base of FAQs, 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://support.rockwellautomation.com.
Installation Assistance
If you experience a problem with a hardware module 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 module up and running:
New Product Satisfaction Return
Rockwell tests all of our 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:
United States 1.440.646.3223 Monday – Friday, 8am – 5pm EST
Outside United States Please contact your local Rockwell Automation representative for any
technical support issues.
United States Contact your distributor. You must provide a Customer Support case number
(see phone number above to obtain one) to your distributor in order to
complete the return process.
Outside United States Please contact your local Rockwell Automation representative for return
procedure.