ABB Symphony Harmony Series, Instruction, Page: 59 / 402

iv WBPEEUI240751C0
Table of Contents
(continued)
Section 3 Description and Operation
(continued)
Analog Input.........................................................................................................3-1
Data Conversion ...............................................................................................3-2
Calibrations ......................................................................................................3-3
Analog Output ......................................................................................................3-3
Data Conversion ...............................................................................................3-3
Calibrations ......................................................................................................3-3
Readback..........................................................................................................3-4
Digital Input .........................................................................................................3-4
Digital Output ......................................................................................................3-5
I/O Block .................................................................................................................3-6
I/O Module ...........................................................................................................3-7
Block Power ......................................................................................................3-8
Central Processing Unit...................................................................................3-10
Memory ..........................................................................................................3-11
Hnet Interface .................................................................................................3-11
Machine Fault Timer .......................................................................................3-12
Serial Link Interface ........................................................................................3-12
LED Drivers and Status LEDs .........................................................................3-14
I/O Channel Interface .....................................................................................3-14
I/O Section .....................................................................................................3-14
Special Operations Switch (SW2) .....................................................................3-15
Base ...................................................................................................................3-15
Screw and Clamp Termination Bases ..............................................................3-15
Cable Connection............................................................................................3-18
Shield Terminations (Chassis Ground) ............................................................3-19
I/O Module Mounting .....................................................................................3-19
Hardware Keying ................................................................................................3-20
I/O Redundancy .................................................................................................3-20
Failure Mode (Outputs) .......................................................................................3-20
Short Circuit Protection ......................................................................................3-22
Auxiliary Block .......................................................................................................3-24
I/O System Configuration.......................................................................................3-24
I/O Block Hardware............................................................................................3-25
I/O Block Function Codes...................................................................................3-25
Section 4 Redundancy .................................................................................................4-1
Introduction .............................................................................................................4-1
Description...............................................................................................................4-1
Redundancy Arbitration........................................................................................4-2
Failover ................................................................................................................4-2
Analog Input.............................................................................................................4-3