Model 1450 I/O Expansion Module Installation & Reference
B.1.7 1450 I/O Expansion Module General-Purpose Output to PLC
Sourcing Input
The Model 1450 I/O Module provides 1mA of source current. If more current is required, a
1.0K Ohm 1W pull-up resistor can be added; connect one end of the resistor to the output and
the other end to a +24V OUT terminal on the I/O Expansion Module.
The corresponding LEDs will illuminate only when the outputs are activated in the pulled-up
state.
NOTE
The status LEDs for general-purpose outputs will illuminate even in the sourcing input case, where the
output is activated but the load does not detect a high (i.e., the pull-up resistor is not sufficient to overcome
the load resistance to ground). This is because the LED indicator is driven from the logic source at the
micro-controller and not connected directly to the load.
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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...
