Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 203
Chapter 7 1715 Redundant I/O System in SIL 2 Safety Applications
See the latest certifications for software and firmware at
rok.auto/certifications
. See the TÜV website at
http://www.tuvasi.com
for SIL 2 certification listings.
All I/O modules include line monitoring capability. We recommend that you
use line monitoring for safety-related I/O. Safety-related I/O refers to an
annunciator being available to an input or output that is attached to a field
device. For energize-to-action (normally de-energized) I/O, you must enable
line monitoring.
Typical Configurations The 1715 system supports single module configurations, where it is acceptable
to either stop the system or allow the signals corresponding to that module to
change to their default fail-safe state. It also supports fault-tolerant I/O
configurations where the system is required to continue operating in the event
of a fault.
Fault tolerant systems have redundant modules that let the system continue
operation in the presence of a fault. The system fails safe if another fault
occurs.
All configurations can be used for safety-related applications. Choose the
appropriate configurations that are based on the fault tolerance requirements
of your application.
Table 39 - 1715 Devices in a SIL 2 System
Cat. No.
Firmware
Revision
Description
Termination Assembly
Cat. No. Description
1715-AENTR
2.001 or
later
Ethernet adapter redundant module N/A
1715-IB16D
2.001 or
later
(1)
(1) For revision 3.001 and later, the 1715 I/O module firmware displayed is the revision that is installed on the I/O module.
For earlier revisions 1715 I/O module firmware is displayed as the same level of the firmware of the 1715-AENTR module
regardless of the actual firmware level in the 1715 I/O module.
16-channel digital input module
1715-TASIB16D Digital input simplex
1715-TADIB16D Digital input duplex
1715-OB8DE
2.001 or
later
(1)
8-channel digital output module
1715-TAS0B8DE Digital output simplex
1715-TADOB8DE Digital output duplex
1715-IF16
2.001 or
later
(1)
16-channel analog input module
1715-TASIF16 Analog input simplex
1715-TADIF16 Analog input duplex
1715-OF8I
2.001 or
later
(1)
8-channel analog output module
1715-TASOF8 Analog output simplex
1715-TADOF8 Analog output duplex
1715-A2A N/A Adapter base unit N/A
1715-A3IO N/A I/O module base unit N/A
1715-N2T N/A Tall slot filler cover N/A
1715-N2S N/A Short slot filler cover N/A
1715-C2 N/A Expansion cable - 2 m N/A
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