Rockwell Automation AADvance Controller Solutions Handbook - Manual (Page 110)

 

7-16 Document: 553631
(ICSTT-RM447J_EN_P) Issue: 09:
Solutions Handbook (AADvance Controller)
T9431/2 Analogue Input Module, 8/16 Channel
The T9431/2 analogue input module monitors eight (T9431) or
sixteen (T9432) isolated analogue input channels and measures
input current in the range 0mA to 24mA. Each channel provides
digital state and analogue data to the processor for process
monitoring, line monitoring and field fault detection.
The input module provides local module and channel status
indications through its front panel LEDs, the same indications
can be connected to application variables and viewed at the
Workbench. Comprehensive diagnostics at both system and
module levels provide clear indications which help rapid
maintenance and repair.
The module incorporates signal and power isolation circuits,
which separate each input channel from the rest of the system,
protecting the controller from field faults. An independent
watchdog arrangement monitors the module operation and
provides additional fault containment by a shutdown mechanism
should a fault occur.
These modules mate with the T9831/2/3 Analogue Input
termination assemblies. When analogue modules are installed in
a dual or TMR configuration they provide fault tolerant input
functionality. Hence, plant maintenance personnel can replace
input modules without interrupting the input data flow to the
processor modules.
Analogue Input Line Monitoring
Each analogue input module is set up through the AADvance Workbench. Monitoring
levels for each analogue input channel are configurable at the module and the channel
level. The default parameters are
 Fault: 0 to 3.8mA
 Normal: 3.8 to 22.0mA
 Fault: > 22.0mA
Each input has five configurable voltage bands (there are eight distinct switching
thresholds to allow hysteresis), each of which can be adjusted to provide line
monitoring and field device diagnostics.