Rockwell Automation Publication 5094-UM001E-EN-P - April 2020 69
Chapter 5
Safety I/O Module Features
This chapter describes features that are specific to FLEX 5000™ I/O safety
modules.
Safety Input
Module Features
This section describes features that are available on the FLEX 5000 I/O safety
input modules, that is, the 5094-IB16S and 5094-IB16SXT modules.
The 5094-IB16S and 5094-IB16SXT modules are 16-point safety sinking input
modules that use 16 safety inputs and 8 test outputs.
Safety Application Suitability Levels
Tab le 15 describes the safety application suitability levels for a 5094-IB16S and
5094-IB16SXT module.
Topic Page
Safety Input Module Features 69
Safety Output Module Features 77
Safety Relay Output Module Features 84
Fault and Status Reporting 85
STATUS
POWER
SAFETY DIGITAL 16 INPUT 24 VDC
5094-IB16S
5
5
TB3I
FLEX 5000
TM
I/O
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Table 15 - Safety Application Suitability for 5094-IB16S and 5094-IB16SXT Modules
Suitability Level Conditions Notes
Applications that are rated up to, and including,
SIL CL3, PLc, Cat.2, as defined in IEC 61508,
IEC 61551, IEC 62061, and ISO 13849-1
The modules uses single-channel mode
– Point mode is Safety Pulse Test or Safety
Consider the following:
• The channel mode type, that is, single or dual, affects
Performance Level and Category. You can use the modules
in SIL CL3 applications regardless of channel mode type.
• To achieve SIL CL3 single-channel, the sensor that is used
must be SIL CL3 single-channel as well.
• The requirement that Point mode be Safety Pulse Test
assumes that only the safety I/O module provides
diagnostics to a specific Suitability Level.
The larger safety system within which the safety I/O
module resides can provide the diagnostics necessary to
achieve the stated Suitability Level without the
requirement that Point mode be Safety Pulse Test.
To achieve the specific Safety Integrity Level, see Appendix
C, Application/Wiring Examples for Safety I/O Modules on
page 181
.
Applications that are rated up to, and including,
SIL CL3, PLe, Cat.4, as defined in IEC 61508,
IEC 61551, IEC 62061, and ISO 13849-1
1. The modules use single-channel mode:
– Point mode is Safety Pulse Test or Safety
– Use sheathed cable or cable trunk to separate channel
wiring to mitigate short-circuit faults.
2. The modules use dual-channel mode:
–Point mode is Safety
– Use sheathed cable or cable trunk to separate channel
wiring to mitigate short-circuit faults.
3. The modules use dual-channel mode:
– Point mode is Safety Pulse Test only
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