AB Quality Allen-Bradley 2755-SN3, Руководство пользователя

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Installing the Wiring Base and Power Supply 3–21
Input Module Application
External Power Source
A typical input module application using external power source:
AC or DC Source
External
Input Contacts
Fuse
Recommended
– +
The module and the switch receive power from an external AC or
DC source. Although input modules may be used for package
detection, use the package detect input (see next page) whenever
possible. See Appendix B for available Allen-Bradley fuse, diode
and resistor terminal blocks.
Internal Power Source
A typical input module application using the package 12V
internal power source and Catalog No. 2755-IB5S input module:
External
Input Contacts
To +12V
To +
To -
To
GND
The module and the switch receive power from the package detect
+12V source. Only use input module Catalog No. 2755-IB5S for
this application.
Important: Package detect terminals are not powered until a Reader
is installed on the wiring base.
Note: The circuit must not draw more than 50mA from the Package
Detect terminal block.