Safety Module Applications
Safety digital I/O modules have additional items to be aware of. Type approval,
certification, and suitability for use in safety applications vary by catalog
number.
These modules can be used with GuardLogix 5580 and Compact GuardLogix 5380 safety
controllers in applications up to SIL 3, PLe, Cat. 4 in single-channel and dual-channel
configurations. The Studio 5000 Logix Designer application, version 36 or later, is the
configuration and programming tool for these modules.
IMPORTANT:
TÜV Rheinland has approved GuardLogix 5580 and Compact GuardLogix 5380 controller
systems for use in safety-related applications where the de-energized state is
always considered to be the safe state. You must confirm that the configuration
of each channel of the safety I/O module is set to "Off" to consider those
output points as part of the safety function of any equipment.
IMPORTANT:
Functional safety certification and performance of PointMax I/O safety modules
requires that the modules operate in conditions at or below the ambient
operating temperature specification.
The Probability of Failure on Demand (PFD) and average frequency of a dangerous
failure per hour (PFH) calculations for these modules are based on the module
operating conditions adhering to the ambient operating temperature
specification.
For more information on the ambient operating temperature specification for
PointMax I/O safety modules, see the PointMax I/O System Specifications
Technical Data, publication 5034-TD001.
These restrictions apply to the modules:
- Type-approved and certified for use in safety applications up to and including SIL 3 per IEC 61508.
- Suitable for use in safety applications up to and including Performance Level e (PLe), category 4 per ISO 13849-1.
IMPORTANT:
Requirements are based on the ISO standards that are current at the time of
certification.
For more information on safety application suitability levels with the PointMax
safety I/O modules, see the respective module details.
Single-channel or Dual-channel Mode
You can use safety I/O modules in single-channel mode or dual-channel configuration.
The configuration affects the safety application suitability level for a module.
In single-channel mode, the signal status on one channel is evaluated. Based on that
status, safety input data and safety input status can be off or on.
In dual-channel mode, the consistency between the signal status on two channels is
evaluated. Based on the status on both channels, safety input data and safety input
status can be off or on.
For safety input modules: The module does not support dual-channel mode. You can use
instructions with any channels. There is no requirement to use one even and one
odd.
For safety output modules: You select the predefined dual-channel pairs in the module
properties.
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