Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 84)

84 Rockwell Automation Publication 1715-UM001C-EN-P - March 2014
Chapter 2 Installation Instructions
Field Wiring of Digital Input Termination Assemblies
The termination assembly routes each digital input through a circuit. See
Figure 33 . The input channel is protected with a 50 mA fuse. When an extreme
over-voltage is applied to the input, the fuse blows. Each digital input signal is
terminated by 5.11 khigh reliability load and is fed to the input module’s input
circuit.
Figure 33 - 1715-TASIB16D Digital Input Termination Assembly Input Circuit
+ve
4K99
F1
24V Digital
Field Input
Channel
50 mA Time Lag
Fuse
100
20
-ve
1715-TASIB16D- Termination Assembly
J1/J2
OV Common
500 mV Range
2.5V Range
1715-IB16D Digital Input Module
Power & Signal
Isolator
M
32101-M