Allen-Bradley GuardPLC 1753, Safety Reference Manual

Page: 54 / 120

54 Publication 1753-RM002C-EN-P - September 2008
Chapter 5 GuardPLC DeviceNet Safety Scanner
Certification
Certificate No. 968/EZ 200.00/05
TÜV Rheinland Group
TÜV Industrie Service GmbH
Automation, Software, and Informatinstechnologie
Safety Requirements for
DeviceNet Safety Scanner
The DeviceNet Safety Scanner is typed-approved and certified for use
in applications up to and including SIL 3 according to IEC 61508, and
applications up to and including CAT 4 according to EN954-1.
For configuring DeviceNet Safety Scanner use RSNetWorx for
DeviceNet software version 6.00 or later.
The High-speed Safety Protocol (HSP) allows the exchange of safety
and standard data between the DeviceNet safety scanner and
GuardPLC 1600 and 1800 controllers. The DeviceNet safety scanner
and GuardPLC controller interchange safety input and output data,
and standard input and output data tables. Safety application data
tables are protected from standard data.
Safety and Standard Data
In order to understand how to use data signals from the safety scanner
in your GuardPLC application logic, you must know:
•
whether the signal data is regarded as safety or standard data by
the end device.
•
whether the signal data was transferred over a safety connection
or a standard connection.
The following table defines permitted uses of safety and standard
signals based on connection and signal type.
Permitted Uses
End-device Signal
Definition Connection Type Permitted Use in Application
Safety Safety Safety
Standard Standard
Standard Safety Standard
Standard Standard
IMPORTANT
Only safety signal data transmitted over safety connections
may be used as safety data in safety application logic.