Rockwell Automation T3420AF ICS Regent Analog Input Modules - Manual (Page 35)

Analog Input Modules (T3420A, AF)
P D - 6 0 2 3 M a r - 0 6
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clamshell housing. Remove the I/O extender module from
the I/O chassis and reinstall the calibrated module in the
I/O chassis.
The module’s red Fault indicator will be on until you
perform a voted reset by pressing the Reset buttons on two
of the Regent processor modules. After the voted reset is
complete, the module’s green Active indicator should turn
on.
Table 6. Analog Calibration Voltages.
Configured Voltage
Range
Offset Input Voltage Gain Input Voltage
0.00 to +10.00 volts 0.0049 VDC 9.9951 VDC
-10.00 to +10.00 volts 9.9902 VDC 9.9902 VDC
+1.00 to +5.00 volts 1.0020 VDC 4.9980 VDC
0.00 to +5.00 volts 0.0024 VDC 4.9976 VDC
-5.00 to +5.00 volts 4.9951 VDC 4.9951 VDC
Safety Considerations
The analog input modules are TÜV certified as non-
interfering and when properly configured are also certified for
Risk Class 5 safety critical inputs. Safety critical
configurations include midvalue selection methods.
In safety critical input applications using a single sensor, it is
important that the sensor failure modes be predictable and
well understood, so there is little probability of a failed sensor
not responding to a critical process condition. In such a
configuration, it is important that the sensor be tested
regularly, either by dynamic process conditions that are
verified in the Regent, or by manual intervention testing.
Redundant sensors can be used with redundant input
modules to eliminate any single points of failure and extend
fault tolerance to include the sensors.
For additional safety considerations, please refer to the Safety
Considerations section of the Regent User’s Guide.