Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,
and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required
to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.
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.
ATTENTION: 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, and recognize the consequence.
Identifies information that is critical for successful application and understanding of the product.
Labels may also be on or inside the equipment to provide specific precautions.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).
Allen-Bradley, GuardLogix, Guardmaster, POINT Guard I/O, Rockwell Automation, Rockwell Software, RSNetWorx, SmartGuard, and Studio 5000 are trademarks of Ro ckwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
Summary of Changes
This manual contains new and updated information. Changes throughout this
revision are marked by change bars, as shown to the right of this paragraph.
New and Updated
Information
This table contains the changes made to this revision.
Top icPa ge
Added information on accessing Release Notes.12
Added information on single -channel operation to the list of 1734-IB8S module features18
Updated Single-channel Mode Normal Operation and Fault Detection figure.26
Updated Dual-channel, Equivalent Normal Operation and Fault Detection figure.28
Updated Complementary, Normal Operation and Fault Detection figure.29
Updated Dual-channel Setting figure.39
Added information on placing Series B modules.48
Updated European Hazardous Location Approval information.52
Added guidance for using the 1734-IE4S module's sensor power supply.58
Correc ted the Cla ss ID in Ta bl e 15
Updated Appendix C: Specifications161
Added specification for Sensor Supply Undercurrent Fault.166
Added Safety Data for Series B modules to Appendix C.173
Safety Analog Input Module (1734-IE4S) 158
Rockwell Automation Publication 1734-UM013J-EN-P - July 20143
Summary of Changes
Notes:
4Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Rockwell Automation Publication 1734-UM013J-EN-P - July 20149
Table of Contents
10Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Preface
Thoroughly read and understand this manual before installing and operating a
system using POINT Guard I/O™ modules.
Always observe the following guidelines when using a module, noting that in this
manual we use safety administrator to mean a person qualified, authorized, and
responsible to secure safety in the design, installation, operation, maintenance,
and disposal of the ‘machine’.
• Keep this manual in a safe place where personnel can refer to it when
necessary.
• Use the module properly according to the installation environment,
performance ratings, and functions of the machine.
Studio 5000 Environment
See Understand Suitability for Use on page 15
page 17.
Product specifications and accessories can change at any time. Consult with your
Rockwell Automation representative to confirm specifications of purchased
product. Dimensions and weights are nominal and are not for manufacturing
purposes, even when tolerances are shown.
Consult your Rockwell Automation representative if you have any questions or
comments. Also refer to the related documentation, listed in the page 13
necessary.
The Studio 5000® Automation Engineering & Design Environment combines
engineering and design elements into a common environment. The first element
is the Studio 5000 Logix Designer™ application. The Logix Designer application
is the rebranding of RSLogix™ 5000 software and will continue to be the product
to program Logix5000™ controllers for discrete, process, batch, motion, safety,
and drive-based solutions.
and Safety Precautions on
, as
The Studio 5000 environment is the foundation for the future of Rockwell
Automation® engineering design tools and capabilities. The Studio 5000
environment is the one place for design engineers to develop all of the elements of
their control system.
Rockwell Automation Publication 1734-UM013J-EN-P - July 201411
Preface
Terminology
Ter mMe ans
ConnectionLogical communication channel for communication between nodes. Connections are maintained and controlled between masters and slaves.
EDSElectronic data sheet, a template used in RSNetWorx software to display the configuration parameters, I/O data profile, and connection-type support for a
given I/O module. RSNetWorx software uses these simple text files to identify products and commission them on a network.
ODVAOpen DeviceNet Vendor Association, a nonprofit association of vendors established for the promotion of CIP networks.
PFDProbability of failure on demand, the average probability of a system to fail to perform its design function on demand.
PFHProbability of failure per hour, the probability of a system to have a dangerous failure occur per hour.
Proof testPeriodic test performed to detect failures in a safety-related system so that, if necessary, the system can be restored to an as-new condition or as close as
practical to this condition.
SNNSafety network number, which uniquely identifies a network across all networks in the safety system. You are responsible for assigning a unique number
for each safety network or safety sub-net within a system.
StandardDevices or portions of devices that do not participate in the safety function.
Access Product Release Notes
Refer to this table for the meaning of common terms.
Product release notes are available online within the Product Compatibility and
Download Center.
1. From the Quick Links list on http://www.ab.com
, choose Product
Compatibility and Download Center.
2. From the Compatibility Scenarios tab or the Get Downloads tab, search
for and choose your product.
3. Click the download icon to access product release notes.
12Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Preface
Additional Resources
These documents contain additional information concerning related products
from Rockwell Automation.
Resource Description
POINT I/O Selection Guide, publication 1734-SG001Provides selection information for POINT I/O™ modules. Additional publication references
GuardLogix 5570 Controllers User Manual, publication 1756-UM022Provides information on how to install, configure, program, and use GuardLogix 5570
GuardLogix 5570 Controller Systems Safety Reference Manual, publication 1756-RM099
GuardLogix Controller Systems Safety Reference Manual, publication 1756-RM093Provides information on safety system requirements and describes the GuardLogix®
GuardLogix Controllers User Manual, publication 1756-UM020Provides information on how to install, configure, program, and use GuardLogix
SmartGuard 600 Controllers User Manual, publication1752-UM001Describes how to configure, operate, and troubleshoot the controller.
Field Potential Distributor Installation Instructions, publication 1734-IN059
POINT I/O 24V DC Expansion Power Supply Installation Instructions,
publication 1734-IN058
POINT I/O 120/240V AC Expansion Power Supply Installation Instructions,
publication 1734-IN017
POINT I/O Wiring Base Assembly Installation Instructions, publication 1734-IN511
POINT I/O One-piece Wiring Base Assembly Installation Instructions,
publication 1734-IN028
DeviceNet Modules in Logix5000 Control Systems User Manual, publication DNET-UM004 Provides information on how to connect the controller to the network.
ODVA Media Planning and Installation Guide, http://www.odva.org
Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1Provides general guidelines for installing a Rockwell Automation industrial system.
Product Certifications website, http://www.ab.comProvides declarations of conformity, certificates, and other certification details.
Describes the required media components and how to plan for and install these required
are listed as well.
controllers in Studio 5000 Logix Designer projects.
Provides information on safety application requirements for GuardLogix 5570 controllers
in Studio 5000™ Logix Designer projects.
controller system.
controllers in RSLogix 5000 projects.
Provides reference information describing the GuardLogix Safety Application Instruction
Set.
Provides installation information on 1734-FPD distributors.
Provides installation information on 1734-EP24DC power supplies.
Provides installation information on 1734-EPAC power supplies.
Provides installation information on 1734-TB and 1734-TBS assemblies.
Provides installation information on 1734-TOP, 1734-TOPS, 1734-TOP3, and 1734-TOP3S
assemblies.
components.
You can view or download publications at
http://www.rockwellautomation.com/literature/
. To order paper copies of
technical documentation, contact your local Allen-Bradley® distributor or
Rockwell Automation sales representative.
Rockwell Automation Publication 1734-UM013J-EN-P - July 201413
Preface
Notes:
14Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Chapter 1
POINT Guard I/O Overview
Top icPag e
Understand Suitability for Use15
Safety Precautions17
POINT Guard I/O Modules in CIP Safety Systems17
Safety Application Requirements21
Use the POINT Guard I/O safety modules in the POINT I/O platform to
distribute safety I/O on a safety-control network that meets the requirements up
to and including SIL CL3, and PLe, Cat. 4 as defined in IEC 61508, IEC 61511,
IEC 62061, and ISO 13849-1. POINT Guard I/O modules may be used with
1756 GuardLogix, 1768 Compact GuardLogix, or SmartGuard 600 controllers.
Understand Suitability for
Use
You can configure the modules for use on DeviceNet networks by using the
network configuration tool, RSNetWorx™ for DeviceNet software. For EtherNet
networks, use the GuardLogix programming tool, the Logix Designer
application.
Rockwell Automation is not responsible for conformity with any standards,
codes, or regulations that apply to the combination of the products in your
application or use of the product. See Legislations and Standards
more information.
Take all necessary steps to determine the suitability of the products for the
systems, machine, and equipment with which it is used.
Know and observe all prohibitions of use applicable to these products.
Use this equipment within its specified ratings.
Never use these products for an application involving serious risk to life or
property without making sure that the system as a whole was designed to address
the risks and that the Rockwell Automation products are properly rated and
installed for the intended use within the overall equipment or system.
on page 179 for
Rockwell Automation Publication 1734-UM013J-EN-P - July 201415
Chapter 1POINT Guard I/O Overview
TIP
Verify that the POINT Guard I/O firmware revision is correct prior to
commissioning the safety system. Firmware information for safety I/O modules
is available at
Field power must be applied to the 1734-IE4S module when updating
firmware.
Verify that a safety administrator conducts a risk assessment on the machine and
determines module suitability before installation.
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.
ATT EN TI ON : Use only appropriate components or devices complying with
relevant safety standards corresponding to the required safety category and
safety integrity level.
• Conformity to requirements of the safety category and safety integrity level
must be determined for the entire system.
• We recommend you consult a certification body regarding assessment of
conformity to the required safety integrity level or safety category.
You are responsible for confirming compliance with the applicable standards for
the entire system.
Emergency stop switchesUse approved devices with direct opening mechanisms complying with IEC/EN 60947-
Door interlocking switches,
limit switches
Safety sensorsUse approved devices complying with the relevant product standards, regulations, and
Relays with forcibly- guided
contacts, contac tors
Other devicesEvaluate whether devices used are appropriate to satisfy the requirements of safety
5-1.
Use approved devices with direct opening mechanisms complying with IEC/EN 60947-
5-1 and capable of switching microloads of
24V DC, 3 mA.
rules in the country where used.
Use approved devices with forcibly-guided contacts complying with EN 50205. For
feedback purposes, use devices with contacts capable of switching micro loads of
24V DC, 3 mA.
category levels.
Bulletin 800F, 800T
Bulletin 440K, 440G, 440H for interlock switch
Bulletin 440P, 802T for limit switch
Any Guardmaster product
Bulletin 700S, 100S
-
16Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
POINT Guard I/O OverviewChapter 1
Safety Precautions
Observe these precautions for proper use of POINT Guard I/O modules.
ATTENTION: As serious injury may occur due to loss of required safety function,
follow these safety precautions.
• Never use test outputs as safety outputs. Test outputs are not safety outputs.
• Do not use Ethernet, DeviceNet, or ControlNet standard I/O data or explicit
message data as safety data.
• Do not use LED status indicators on the I/O modules for safety operations.
• Do not connect loads beyond the rated value to the safety outputs.
• Apply properly specified voltages to the module. Applying inappropriate
voltages may cause the module to fail to perform it’s specified function, which
could lead to loss of safety functions or damage to the module.
• Wire the POINT Guard I/O modules properly following the wiring requirements
and guidelines in Wire Modules
on page 58.
• Set unique network node addresses before connecting devices to the network.
• Perform testing to confirm that device wiring, configuration, and operation is
correct before starting system operation.
• Do not disassemble, repair, or modify the module. This may result in loss of
safety functions.
Installing and Replacing Modules
POINT Guard I/O Modules in
CIP Safety Systems
ATTENTION:
• Clear previous configuration data before connecting devices to the network or
connecting input or output power to the device.
• Configure the replacement device properly and confirm that it operates
correctly.
• After installation of the module, a safety administrator must confirm the
installation and conduct trial operation and maintenance.
When cleaning modules, do not use the following:
• Thinner
• Benzene
• Acetone
POINT Guard I/O modules are used in the POINT I/O platform and
implement CIP Safety protocol extensions over EtherNet/IP and DeviceNet
networks to communicate safety messages. POINT Guard I/O modules connect
to EtherNet/IP or DeviceNet networks via these network adapters.
Table 2 - Network Adapters
NetworkSystemAdapter
EtherNet/IPGuardLogix1734-AENT (firmware revision 3 or later)
DeviceNetSmartGuard or GuardLogix1734-PDN
(1)
1734-AENTR
(1) Not compatible with 1734-ADN, 1734-ADNX, 1734-APB, or 1734-ACNR adapters.
Rockwell Automation Publication 1734-UM013J-EN-P - July 201417
Chapter 1POINT Guard I/O Overview
Distributed I/O communication for safety I/O data is performed through safety
connections supporting CIP Safety over an EtherNet/IP or DeviceNet network.
Data processing is performed in the safety controller. The status and fault
diagnostics of POINT Guard I/O modules are monitored by a controller.
In addition to I/O state data, the modules include status data for monitoring I/O
faults within each circuit.
The configuration information of the modules can be protected by a password.
1734-IB8S Digital Input Module Features
• Safety digital inputs
– Safety devices, such as emergency stop push buttons, gate switches, and
safety light curtains, can be connected.
– Dual-channel mode evaluates consistency between two input signals
(channels), which allows use of the module for safety Category 3 and 4
and in applications rated up to and including Performance Level e/
SIL CL3.
– Single-channel mode evaluates one input signal (channel), which allows
use of the module for safety Category 2 and in applications rated up to
and including Performance Level d/SIL CL 2.
– You can configure a discrepancy time to control how long two channels
are allowed to be discrepant before a fault is declared.
– An external wiring short-circuit check is possible when inputs are wired
in combination with test outputs. The module must be wired in
combination with test outputs when this function is used.
– Independently adjustable on and off delays are available per channel.
• Test outputs (digital input modules only)
– Separate test outputs are provided for short-circuit detection of a safety
input (or inputs).
– Power (24V) can be supplied to devices, such as safety sensors.
– Test outputs can be configured as standard outputs.
– Specific test outputs can be used for broken-wire detection of a muting
lamp.
1734-OB8S Safety Digital Output Module Features
• Solid-state outputs
• Dual-channel mode provides redundant control by using two output
signals (channels), which allows use of the module for safety Category 3
and 4, and applications rated up to and including Performance Level e/
SIL CL3.
• Safety outputs can be pulse-tested to detect field wiring short circuits to
24V DC.
18Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
POINT Guard I/O OverviewChapter 1
1734-IE4S Safety Analog Input Module Features
• Connection of up to four voltage or current sensors.
• Sensor power outputs are individually current-limited and monitored.
• Measurement of process variables, such as temperature, pressure, or flow
• Tachometer mode converts 24V DC switching signals into pulses per
second.
• Single-channel or dual-channel for SIL 3-rated safety devices and
applications.
• Dual-channel mode evaluates the consistency between two input signals
(channels), which allows use of the module in applications rated up to and
including SIL CL3/PLe/Cat. 4.
• You can configure a discrepancy time to control how long two channels are
allowed to be discrepant before a fault is declared.
Programming Requirements
Use the minimum software versions listed here.
Cat. No.Studio 5000 Environment
1734-IB8S,
1734-OB8S
1734-IE4S2118
(1) This version or later.
(2) If you are using digital POINT Guard I/O modules with the analog POINT Guard I/O module, you need to update the add-on
profiles to version 2.02.004 or later for the modules to be compatible with version 18 or later of RSLogix 5000 software and the
Studio 5000 environment. To find add-on profiles, go to http://www.rockwellautomation.com/support
(3) Dual-channel Analog ( DCA) safety application instruction is available in RSLogix 5000 software, version 20 or later and Studio
5000 environment, version 21 and later.
(1)
Versi on
2117
RSLogix 5000 Software
(1)
Vers ion
(EtherNet/IP Network)
(2)
(3)
RSNetWorx for DeviceNet
Software Version
(DeviceNet Network)
9
10
.
(1)
Rockwell Automation Publication 1734-UM013J-EN-P - July 201419
Chapter 1POINT Guard I/O Overview
Safety Communication
GuardLogix
Control ler
CompactBlock
Guard I/O™
POINT Guard I/O and POINT I/O
Standard Communication
Stratix Switch
GuardLogix
Control ler
Guard I/O
POINT Guard I/O and POINT I/O
Safety Communication
Standard Communication
SmartGuard
Control ler
CIP Safety Architectures
Use POINT Guard I/O modules in EtherNet/IP or DeviceNet safety
architectures. Safety controllers control the safety outputs. Safety or standard
PLC controllers can control the standard outputs.
Figure 1 - POINT Guard I/O Modules in EtherNet/IP Safety Architecture
Figure 2 - POINT Guard I/O Modules in DeviceNet Safety Architectures
20Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
POINT Guard I/O OverviewChapter 1
Safety Application
Requirements
POINT Guard I/O modules are certified for use in safety applications up to and
including Performance Level e (PLe/Cat. 4) and Safety Integrity Level 3
(SIL CL3) in which the de-energized state is the safe state. Safety application
requirements include evaluating probability of failure rates (PFD and PFH),
system reaction time settings, and functional verification tests that fulfill SIL 3
criteria.
Creating, recording, and verifying the safety signature is also a required part of
the safety application development process. Safety signatures are created by the
safety controller. The safety signature consists of an identification number, date,
and time that uniquely identifies the safety portion of a project. This includes all
safety logic, data, and safety I/O configuration.
For safety system requirements, including information on the safety network
number (SNN), verifying the safety signature, functional verification test
intervals, system reaction time, and PFD/PFH calculations, refer to the following
publications.
For safety requirements inRefer to
GuardLogix controller systemsGuardLogix 5570 Controller Systems Safety Reference
You must read, understand, and fulfill the requirements detailed in these
publications prior to operating a safety system that uses POINT Guard I/O
modules.
Rockwell Automation Publication 1734-UM013J-EN-P - July 201421
Chapter 1POINT Guard I/O Overview
Notes:
22Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Chapter 2
Output OFF
Input
Inputs to Network OFFNetworks
Safety
Status
44076
Safety Inputs, Safety Outputs, and Safety Data
Top icPag e
Safe States23
Safety Inputs (1734-IB8S)24
Safety Analog Inputs (1734-IE4S)31
Safety Outputs (1734-OB8S)39
I/O Status Data42
Safe States
POINT Guard Digital I/O Modules
ATTENTION:
• The safe state of the outputs is defined as the off state.
• The safe state of the module and its data is defined as the off state.
• Use the POINT Guard I/O module only in applications where the off state is the
safe state.
These are the safe states of the digital POINT Guard I/O modules:
• Safety outputs: OFF
• Safety input data to network: OFF (single channel and
dual-channel equivalent)
• Safety input data to network: OFF/ON for input channels n/n+1
(dual-channel complimentary)
Figure 3 - Safety Status
The module is designed for use in applications where the safe state is the off state.
Rockwell Automation Publication 1734-UM013J-EN-P - July 201423
Chapter 2Safety Inputs, Safety Outputs, and Safety Data
TIP
Where:
T0 = Test Output 0T1M = Test Output 1 with Muting
T2 = Test Output 2T3M = Test Output 3 with Muting
I0…I7 = Safety Inputs
Safety Input
Ter m in a l
External
Contac t
POINT Guard I/O Analog Input Module
These are the safe states of the POINT Guard I/O analog input module:
• Safety input data to network in single-channel configuration: 0 (OFF)
• Safety input data to network in dual-channel equivalent configuration:
– If a diagnostic fault occurs, the signal for the faulted channel is set to 0
(OFF).
– If a dual-channel discrepancy fault occurs, the dual-channel inputs
continue to report actual input signals.
Safety Inputs (1734-IB8S)
Safety inputs are used to monitor safety input devices.
Using a Test Output with a Safety Input
A test output can be used in combination with a safety input for short circuit,
cross-channel, and open-circuit fault detection. Configure the test output as a
pulse test source and associate it to a specific safety input.
The test output can also be configured as a power supply to source 24V DC
to an external device, for example, a light curtain.
Figure 4 - Example Use of a POINT Guard I/O Input Module
I0I1I4I5
0
I2I3I6I7
2
COMCOMCOMCOM
4
TO T1MT2 T3M
6
1
3
5
7
0
2
4
6
1
3
5
7
24Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Safety Inputs, Safety Outputs, and Safety DataChapter 2
X
OUT
Y
On
Off
External Contact
Short-circuit between Input Signal Lines and Power
Supply (positive side)
External Contact
Short-circuit between Input Signal Lines
44079
Figure 5 - Test Pulse in a Cycle
For the 1734-IB8S module, the pulse width (X) is typically 525 μs; the pulse
period (Y) is typically 144 ms.
When the external input contact is closed, a test pulse is output from the test
output terminal to diagnose the field wiring and input circuitry. By using this
function, short-circuits between inputs and 24V power, and between input signal
lines and open circuits can be detected.
Figure 6 - Short-circuit between Input Signal Lines
24V
IN+
COM
T0
24V
0V
IN0
T1
IN1
Rockwell Automation Publication 1734-UM013J-EN-P - July 201425
Chapter 2Safety Inputs, Safety Outputs, and Safety Data
24V
0V
Tes t O utp ut 0
Input Terminal 0
External Device
Faul t De tect ed
ON
OFF
ON
OFF
ON
OFF
ON
OFF
24V
0V
ON
OFF
Safety Input 0
Status
Fault Detection
ON
OFF
ON
OFF
ON
OFF
Safety Input 0
Status
Safety Input 0
Data
Safety Input 0
Data
Input Terminal 0
Normal Operation
External Device
Tes t O utp ut 0
Safety
I/O
Network
Data Sent
to the
Control ler
Safety
I/O
Network
Data Sent
to the
Control ler
Single-channel Mode
If an error is detected, safety input data and safety input status turn off.
Figure 7 - Normal Operation and Fault Detection (not to scale)
26Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Safety Inputs, Safety Outputs, and Safety DataChapter 2
IMPORTANT
IMPORTANT
Dual-channel Mode and Discrepancy Time
To support dual-channel safety devices, the consistency between signals on two
channels can be evaluated. Either equivalent or complementary can be selected.
If the length of a discrepancy between the channels exceeds the configured
discrepancy time (0…65,530 ms in increments of 10 ms), the safety input data
and the individual-safety input status turn off for both channels. In Dual-channel
Complimentary mode, the safety input data goes to off/on for input channels
n/n+1 respectively as described in Ta b l e 3
The dual-channel function is used with two consecutive inputs that are paired
together, starting at an even input number, such as inputs 0 and 1, 2 and 3,
and so on.
If you are using the safety application instructions with a GuardLogix
controller, set the module’s inputs to Single (default). Do not use the modules’
dual-channel mode as this functionality is provided by the safety application
instructions.
.
This table shows the relation between input terminal states and controller input
data and status.
Table 3 - Terminal Input Status and Controller I/O Data
Dual-channel ModeInput TerminalController Input Data and StatusDual-channel
IN0IN1Safety
Input 0 Data
Dual-channels, EquivalentOFFOFFOFFOFFONONOFF Normal
OFFONOFFONONONOFF Normal
ONOFFONOFFON ONON Normal
ONONOFFONOFFOFFOFFFault
Safety
Input 1 Data
Safety
Input 0 Status
Safety
Input 1 Status
Resultant
Data
Dual-channel
Resultant
Rockwell Automation Publication 1734-UM013J-EN-P - July 201427
Chapter 2Safety Inputs, Safety Outputs, and Safety Data
ON
OFF
IN0
Safety Input 0
Data
IN1
Faul t Dete cted
Discrepancy Time
Safety
I/O
Network
Data Sent
to the
Control ler
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
IN0
Safety Input 0, 1
Status
IN1
Fault Detection
ON
OFF
ON
OFF
ON
OFF
Discrepancy Time
Safety Input 0, 1
Status
Safety Input 1
Data
Safety Input 1
Data
Safety Input 0
Data
Normal Operation
Safety
I/O
Network
Data Sent
to the
Contro ller
Dual-channel, Equivalent
In Equivalent mode, both inputs of a pair should be in the same (equivalent)
state. When a transition occurs in one channel of the pair prior to the transition
of the second channel of the pair, a discrepancy occurs. If the second channel
transitions to the appropriate state prior to the discrepancy time elapsing, the
inputs are considered equivalent. If the second transition does not occur before
the discrepancy time elapses, the channels will fault. In the fault state, the input
and status for both channels are set low (OFF). When configured as an
equivalent dual pair, the data bits for both channels will always be sent to the
controller as equivalent, both high or both low.
Figure 8 - Equivalent, Normal Operation and Fault Detection (not to scale)
28Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Safety Inputs, Safety Outputs, and Safety DataChapter 2
ON
OFF
IN0
Safety Input 0
Data
IN1
Faul t Dete cted
Discrepancy Time
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
IN0
Safety Input 0, 1
Status
IN1
Fault Detect ion
ON
OFF
ON
OFF
ON
OFF
Discrepancy Time
Safety Input 0, 1
Status
Safety Input 1
Data
Safety Input 1
Data
Safety Input 0
Data
Normal
Operation
Safety
I/O
Network
Data Sent
to the
Control ler
Safety
I/O
Network
Data Sent
to the
Control ler
Dual-channels, Complementary
In Complementary mode, the inputs of a pair should be in the opposite
(complementary) state. When a transition occurs in one channel of the pair prior
to the transition of the second channel of the pair, a discrepancy occurs. If the
second channel transitions to the appropriate state prior to the discrepancy time
elapsing, the inputs are considered complementary.
If the second transition does not occur before the discrepancy time elapses, the
channels will fault. The fault state of complementary inputs is the
even-numbered input turned off and the odd-numbered input turned ON.
Note that if faulted, both channel status bits are set low. When configured as a
complementary dual-channel pair, the data bits for both channels will always be
sent to the controller in complementary, or opposite states.
Figure 9 - Complementary, Normal Operation and Fault Detection (not to scale)
Rockwell Automation Publication 1734-UM013J-EN-P - July 201429
Chapter 2Safety Inputs, Safety Outputs, and Safety Data
44094
On-delay
ON
OFF
ON
OFF
Input Signal
Safety Input
Network Data
44095
Safety Input
Network Data
Off-delay
Input Signal
ON
OFF
ON
OFF
Safety Input Fault Recovery
If an error is detected, the safety input data remains in the OFF state. Follow this
procedure to activate the safety input data again.
1. Remove the cause of the error.
2. Place the safety input (or safety inputs) into the safe state.
3. Allow the input-error latch time to elapse.
After these steps are completed, the I/O indicator (red) turns off.
The input data is now active.
Input Delays
On-delay—An input signal is treated as Logic 0 during the on-delay time
(0…126 ms, in increments of 6 ms) after the input contact’s rising edge. The
input turns on only if the input contact remains on after the on-delay time has
elapsed. This helps prevent rapid changes of the input data due to
contact bounce.
Figure 10 - On-delay
Off-delay—An input signal is treated as Logic 1 during the off-delay time
(0…126 ms, in increments of 6 ms) after the input contact’s falling edge.
The input turns off only if the input contact remains off after the off delay time
has elapsed. This helps prevent rapid changes of the input data due to contact
bounce.
Figure 11 - Off-delay
30Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
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