Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 124)

124 Rockwell Automation Publication 1715-UM001C-EN-P - March 2014
Chapter 3 Digital I/O Operation
Each digital I/O module is an isolated module that plugs into a single position of
the I/O base unit and a termination assembly that is mounted to the base unit.
Digital I/O modules can be configured in RSLogix programming software as
simplex or duplex and then by selecting one of the two available termination
assemblies and the required number of modules.
Termination assemblies provide termination for the field I/O channels and, by
the use of coding pegs and sockets, are matched to a specific digital I/O module.
Module keying can also be set in the project. Field connections are made at the
terminal block connectors on the termination assembly.
The digital I/O modules and termination assemblies for the 1715 Redundant
I/O System are as follows.
1715-IB16D Digital Input Module
The digital input interface is a combination of digital input modules and
termination assemblies. The 24V DC isolated digital input modules have a
flexible and fail-safe design. The 1715-IB16D interfaces 16 digital input
channels and
can be configured in RSLogix programming software as simplex or
duplex by selecting one of the two available termination assemblies and the
required number of modules.
The 1715-IB16D digital input module features are as follows:
• Flexible, modular construction for user-configured I/O applications
• 16-channel connection capability
• Suitable for simplex, duplex connections and fault tolerant applications
• Independent, galvanically isolated input channels
• Built-in diagnostic testing and independent watchdog facility
• Module removal and replacement online and, when in Duplex mode, no
interruption of the signal inputs
• Input voltage data is provided for line monitoring and field fault detection
Table 17 - Types of ControlLogix Digital I/O Modules and Components
Cat. No. Description
1715-IB16D 16-channel digital input module
1715-OB8DE 8-channel digital output module
1715-TASIB16D 16-channel digital input simplex termination assembly
1715-TADIB16D 16-channel digital input duplex termination assembly
1715-TASOB8DE 8-channel digital output simplex termination assembly
1715-TAD0B8DE 8-channel digital output duplex termination assembly
IMPORTANT When the 1715-IB16D digital input module is used with the 1715-TASIB16D
simplex termination assembly, it is nonisolated.