I/O Module Installation and Wiring - I/O Terminal Block Wiring Diagrams
100 HC900 Process Controller Installation and User Guide Revision 19
06/14
Contact Input Module Wiring
The Contact Input Module has sixteen inputs in one group. An example of Contact Input wiring is shown
in Figure 55.
Specifications for the Contact Input Module and other modules are given in the Specifications section of
this manual.
Internally Powered Input Channels
The Contact Input Module provides voltage to the field contacts.
CAUTION
Do not apply any external power to the field device or to the input terminals. Doing so
could damage the module.
Common terminals
Four common terminals are provided for the 16 inputs. Terminals 9, 10, 11, and 12 are connected in the
Contact Input module.
Hazardous voltages exist at terminal blocks.
• Using switches at field devices disconnect the field wiring from power sources before servicing.
Failure to comply with these instructions could result in death or serious injury.
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