Rockwell Automation 1794-OB16D FLEX I/O Diagnostic Modules User Manual - Manual (Page 117)

Publication 1794-UM061A-EN-P - July 2006
Simplified Schematics of FLEX I/O Digital Modules 115
1794-IB16D 24V DC 16 Diagnostic Input Module
+
-
V+
User Power
Reverse
Voltage
Monitor
Shorted
Input
Monitor
Reverse
Short
Open
Input
Open
Wire
Monitor
PTC
Sensor Power
Input
Input Circuit Indicator
Fault Indicator
Flexbus Interface
Input Device
24V dc
C-43
C-36
B-17
A-0
*
* Use a 20 K Ω 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.
Typical Simplified Schematic for Input 0
and a 1794-TB32, 1794-TB32S Terminal Base