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1756GuardLogix™Integrated Safety Controller

Integrated SafetyGuardLogix isn’t just a safety controller, it’s a standard ControlLogix

processor plus safety features that ensure SIL 3 safety control. With its

two-processor architecture (1oo2), it utilizes a safety primary and a safety

partner processor. A benefit of this type of system is that it’s still a single

project. The safety partner is a part of the system, is automatically

configured, with no setup, configuration or download to the safety

partner required.

With GuardLogix, you can reap the advantages of using RSLogix 5000, the

standard development environment for all Allen-Bradley Logix controllers.

 The flexible tagbased system is the easiest to use on the market today.

Plus, RSLogix 5000 manages safety, so you don’t have to manually manage

the separation of standard and safety memory, or worry about partitioning

logic to isolate safety, it’s all done for you by RSLogix 5000.

Automation users and manufacturers

continue to look for flexible solutions

that can help address global safety

standards and regulations. These

regulations combined with competitive

pressures to reduce costs and improve

productivity demand a better integration

of standard and safety control.

Now, with the Allen-Bradley® GuardLogix™,

you get safety control partnering with the

ControlLogix® processor for true integrated

safety that offers SIL 3 control.

Benefits

• RSLogix™ 5000

- Safety Task automatically created with

tools that restrict user implementation

to safety functions

- Single controller view

• Standard Control Task(s)

- Same functionality as ControlLogix

• Safety Control - Safety Task 

- Restricted set of features and functions

- Safety Specific Instructions

- Security (Safety Task Signature, Locking)

- Safety Task Addresses Safety I/O

• 14 TUV-certified Safety instructions

reduce memory usage, improve logic

creation, and make troubleshooting/

maintenance easy.

• Leverages standard ControlLogix

hardware

- Racks, power supplies, communications

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With a much easier development and debug environment, multiple users can edit

the project during development of safety, similar to standard since online editing

and forcing are all allowed. Once the project is tested and ready for final valida-

tion, the user sets the Safety Task to a SIL 3 integrity level, which is then enforced

by the GuardLogix controller. Safety Memory is locked and protected, and safety

logic can’t be modified. Once safety is locked to a SIL 3 state the standard side of 

GuardLogix operates like a regular Logix controller.

Another key time advantage is that since safety is integrated, Safety Memory

can be read by standard logic and external devices like HMIs or other controllers.

 There is no need to spend time setting up or conditioning safety data from a

dedicated safety device. The result is easy system-wide integration and the

ability to easily display safety status on displays or marquees.

GuardLogix uses CIP Safety for connectivity to distributed IP20 CompactBlock™

Guard I/O™ or IP67 ArmorBlock® Guard I/O™. CIP safety is also used for safety

interlocking between GuardLogix processors over ControlNet or EtherNet/IP™.

 This provides users extreme flexibility in how safety I/O can be distributed, or

how safety data can be shared between multiple GuardLogix controllers for safe

interlocking between different cells/areas.

What is SIL 3?SIL(Safety Integrity Level) is a measure of a products ability to lower

the risk that a dangerous failure could occur. As defined in IEC

61508 “Functional Safety of Electrical/Electronic/ Programmable

Safety- Related Systems”. SIL defines a products ability to operate

in safety-rated aspects of a control system. SIL 2 and SIL 3 are the most common

levels for machinery and process safety applications, GuardLogix can be used in

applications that require the use of SIL 2 or SIL 3 compliant products.

Publi ca ti on 1756-PP009B-EN-P – November 2008 Copyri ght ©2008 Rockwell Automation, Inc. All Ri ghts Reser ved. Printed in USA.Supersedes Publication 1756-PP009A-EN-P – September 2006

All trademarks and registered trademarks are property of their respective companies.

AutomationControllers1756-L63S   8 Meg. Standard Memory

3.75 Meg. Safety Memory

1756-L62S   4 Meg. Standard Memory

1 Meg. Safety Memory

1756-L61S   2 Meg. Standard Memory

1 Meg. Safety Memory

1756-LSP   Safety Partner Automatically Assigned to the next Slot -

Right of the Safety Controller