Introduction 
6    HC900 Process & Safety Controller User and Installation Manual  Revision 6 
    21 April 2017 
Low VoltageTerminal Block (Euro style) 
Low VoltageTerminal Block (Barrier style) 
High VoltageTerminal Block (Euro style) 
High VoltageTerminal Block (Barrier style) 
High Density Terminal Block (Euro style) 
Filler Block Terminal Cover 
Analog Input Remote Terminal Panel 
(RTP) 
Relay Output Remote Terminal Panel 
(RTP) 
DI, DO, AO Remote Terminal Panel (RTP) 
Redundant Power status module 
*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 
 
Conventions 
Throughout this guide, where the text “Legacy systems” is used, the following model numbers are applicable. 
  Legacy systems Model Numbers 
  900C51 – 00XX-00 
  900C52 – 00XX-00 
  900C31 – 00XX-00 
  900C32 – 00XX-00 
  900C71 – 00XX-00 
  900C72 – 00XX-00 
  900C71R – 0000-XX 
  900C72R – 0000-XX 
  900RSM – 0001 
  900C73R – 0000-XX 
  900C53 – 00XX-00