Honeywell HC900 User Manual

Specifications - Input Output System: Common Features 

160 

  HC900 Hybrid Controller Installation and User Guide 

Revision 5 

  

9/03 

 

Any I/O slot in any rack (Controller or I/O expansion) can accommodate any 
module type available for use in the HC900 system.  Also, racks can 
accommodate any mix of modules within constraints regarding power 
availability. 

Power supplies are identical for all racks. 
Scanner modules are identical for IO Expander racks(C50 CPU only). 

Every module has the same 20-pin (inline) connector on the printed wiring 
board, that mates with either style of wiring terminal board available for the 
HC900. 

Two types are available: 20-connector barrier strip or 20-connector "Euro" 
style.  Both styles fit any type of I/O module available for the HC900 System.  

Blocks have color code: red block, with tin plating on terminals for higher 
voltages, and black with gold plating for lower voltages.  Coding system 
applies to both block types. 

Key matches module to connector, ensuring correct board replacement  

 

Every terminal board assembly includes a hinged door that accommodates a 
color-coded, pre-printed label.  Eight label types are available (label type per 
I/O module type). 

All I/O modules include microcontrollers for handling communications with the 
Controller Module, and for performing and reporting diagnostics 

All I/O modules include an integrated set of light pipes on the back of the 
circuit board that convey: 

- Status of the module (Tri-color) 
- for digital modules, activity status of each channel (in green) 

All modules include a metal cover that protects the front of the board.  The 
metal cover includes a formed-in loop at front for module extraction. 

Standard.  Modules are automatically sensed and configured on insertion.  
Field power shall be disconnected before removing terminal blocks.