Allen-Bradley GuardPLC 1753, Safety Reference Manual

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Publication 1753-RM002C-EN-P - September 2008 17
Safety Concept for GuardPLC Controllers and GuardPLC I/O Chapter 1
Safety Requirements
The following safety requirements must be followed when using the
safety PES of the GuardPLC system.
Hardware Configuration
There are product-independent and product-dependent hardware
configurations for the GuardPLC system.
Product Independent
•
Use only GuardPLC hardware and software that appear in the
GuardPLC version list available at
http://www.rockwellautomation.com/products/certification/safety/ .
•
Use RSNetWorx for DeviceNet software version 6.0 or later to
configure the DeviceNet safety scanner and DeviceNet safety
I/O module.
•
Use RSLogix Guard PLUS! programming software, according to
IEC 61131-3, for support in the creation of safety programs for
GuardPLC controllers and GuardPLC I/O modules. Programming
software is defined in IEC 61131-1.
•
Follow the specifications listed in Appendix A .
•
Hardware modules and software components which are not
fail-safe, but do not cause any adverse reactions, can be used to
process standard signals. However, they cannot be used to carry
out safety tasks.
•
Use the closed-circuit current principle in all external safety
circuits connected to the system.
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