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Typical Simplified Schematic for Input 0
and a 1794-TB32 or 1794-TB32S Terminal Base
-
C-36
User Power
24V dc
+
C-43
Sensor Power
B-17
*
Input Device
Input
A-0
Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
1794-IB16D 24V DC 16 Diagnostic Input Module
Reverse
Voltage
Monitor
Shorted
Input
PTC
Monitor
Open
Wire
Monitor
Input Circuit Indicator
Use a 20 KΩ dummy resistor on unused input channels and on inputs that have
*
hard-contact input devices. The dummy resistors can be placed between sensor
power and the input channel, or between sensor power and common.
Simplified Schematics of FLEX I/O Digital Modules
Reverse
Short
V+
Fault Indicator
Open
Input
Appendix B
117
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