Introduction 
Revision 6    HC900 Process & Safety Controller User and Installation Manual  5 
21 April 2017 
SIL System 
12 Slot Rack - Red. Power 
I/O Scanner – 1 Port (1 per I/O rack) - SIL 
I/O Scanner – 2 Port (1 per I/O rack) - SIL 
Full Document set on CD – SIL 
Full document set, SIL hard copy – 
English 
Analog Input Hi level (16channel) 
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, 120/240 VAC, (16 channel) 
Digital In, 120/240 VAC, 125VDC 
(16 channel-Isolated) 
Digital Input, 24VDC 
(32 channel) 
Digital Output, Relays 
(8 channel) 
Digital Output, 24VDC 
(16 channel) 
Digital Output, 120/240 VAC (8 channel) 
Digital Output, 24VDC (32 channel) 
Pulse/Freq/Quad (4chan, 1Quad) 
May be used in Safety systems on 
the Process Worksheet ONLY.