Wiring Inputs and Outputs
B.1.2 1450 I/O Expansion Module General-Purpose Input from PLC
Sinking Output
The general-purpose inputs can also be triggered from PLC outputs by connecting an additional,
external resistor (for example, 4.7K Ohms 0.25W) from a +24V OUT terminal on the I/O
Expansion Module to the input. In this case, the resistor supplies 24V to the input. The PLC
output will pull the voltage down to 0V, deactivating the input. This creates an inversion with the
input OFF when the PLC output is ON, and vice-versa. The sense of the input can be changed
using the In-Sight software.
LED indicators are provided on the I/O Expansion Module to indicate the status of the inputs. The
LED indicators will illuminate when the inputs are actively pulled high, either by the source or the
added pull-up resistor.
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Summary of Contents for In-Sight 1450
Page 1: ...System D I S T R I B U T E U R C O N S E I L D E P U I S 1 9 8 5...
Page 2: ......
Page 6: ...Precautions iv...
Page 8: ...Table of Contents vi...
Page 10: ...List of Figures viii...
Page 12: ...List of Tables x...
Page 16: ...Introduction 4...
Page 32: ...Specifications 3 5 Dimensions Figure 3 5 I O Expansion Module Dimensions 20...
