Introduction 
2    HC900 Process & Safety Controller User and Installation Manual  Revision 6 
    21 April 2017 
Model Selection Guide 
Legacy System 
12 Slot Rack - Red. Power 
I/O Scanner - 2 Port (1 per I/O rack) 
I/O Scanner (for remote rack) 
Redundant Power Status Module 
High Level Analog Input  (16 channel)  
Analog Output, 0 to 20mA, (4 channel)  
Analog Output, 0 to 20mA, (8 channel) 
Analog Output, 0 to 20mA, (16 channel) 
Digital Input, Contact type, (16 channel)  
Digital Input, 24VDC (16 channel)  
Digital Input, 24VDC (32 channel)  
Digital Input, 120/240 VAC, (16 channel)  
Digital Input, 120/240VAC, 125VDC (16ch-Iso) 
Digital Output, Relays ( 8 channel) 
Digital Output, 24VDC (16 channel) 
Digital Output, 24VDC (32 channel) 
Digital Output, 120/240 VAC (8 channel) 
Pulse/Frequency/Quadrature 
 
*Reference only – For the latest Hardware and firmware revision numbers can be found at: 
https://www.honeywellprocess.com/library/support/Public/Downloads/HC900-
SafetyControllerModulesRevisions.zip