S600 I/O System ABB

　　A range of I/O modules is available, covering analog and digital signals of various types. In addition, there are modules for temperature measurement, pulse counting, position measurement and rotational speed measurement applications. The process signals are connected to the front of the I/O modules.

　　The controller may contain up to 75 I/O modules. All I/O modules may be exchanged during system operation. The process signals are disconnected by removing the front connector. A newly inserted module is automatically put into operation if the system identifies the module as being of the correct type and without faults. For further information about S600 I/O please refer to the S600 I/O section in the Input/Output Hardware section.

　　The S600 I/O Hardware Reference Guide and the S600 I/O Hardware Advant Controller 160 Reference Guide detail the various I/O modules available for Advant Controller 160.

　　• Unused supervised inputs

　　Unused supervised analog inputs of the Advant Controller 160 must be terminated with external resistors in order to avoid respective error detection and signalling by the Processor Modules.

　　• Output set as predetermined

　　In case of a severe controller error the outputs can be set to predetermined values. This output set as predetermined guarantees integrity of the process in case of controller failures.

　　Output set as predetermined can be configured with use of the relay outputs of the Processor Modules which are switched over in case of a severe error. Both an open and a closed contact are provided per Processor Module. E.g. the relay outputs can be used to switch off the external voltage for digital outputs if the Processor Module which controls theses outputs fails.

　　S800 I/O System

　　A range of I/O modules is available, covering analog and digital signals of various types. The I/O system can be mounted horizontally or vertically on standard DIN-mounting rails according to DIN EN50033–35×15. The process signals are connected via module termination units, which are acting as I/O module carrier.

　　An I/O station may have of up to 24 I/O modules. All I/O modules may be exchanged during system operation. A newly inserted module is automatically put into operation if the system identifies the module as being of the correct type and without faults.

　　The general description of the I/O system is given within the Product Guide for Advant OCS with Master Software, Overview.

　　• Output set as predetermined

　　In case of a severe module error, the outputs can be set to predetermined values. This output set as predetermined guarantees integrity of the process in case of failures.

　　Communication

　　For communication with other Advant Controllers, Operator Stations, and Engineering Stations, Advant Controller 160 can be connected to Advant Fieldbus 100 using the Communication Interface module CI626, CI627, CI630, or CI631. Two Communication Interfaces of type CI630 or CI631 can be used for redundancy. For communication with subordinate Advant Controllers or S800 I/O two (redundant) communication interfaces CI630 or CI631 ore via one (non redundant) communication interface CI626, CI627, CI630, or CI631 can be used.

　　Configurations for Increased Availability and Safety

　　Advant Controller 160 offers a wide range of configuration options for control system applications with high requirements concerning availability and safety.

　　For high availability—depending on the requirements—a single or even a double fault must be tolerated by the control system. I.e. the configured functions e.g., the control functions of a turbine must run without any interruption in case of a fault.

　　For safety a single or even a double fault must not impede a needed trip of the plant (e.g. a boiler or a turbine). Additionally for high availability usually it is required that a single fault must not activate a trip.

　　Availability can be increased through redundancy. Advant Controller 160 offers module redundancy for all central system components (communication modules, Processor Modules, power supply modules). For redundant signal I/O multiple I/O modules within separate controllers can be used.

　　Safety can be increased through the use of multiple safety channels working in parallel.

　　In the following paragraphs the redundant and parallel configurations supported by Advant Controller 160 and its Processor Modules are shown.

　　For more detailed information refer to the Advant Controller 160 Users Guide.

　　Configuration for Redundant Processing

　　The Processor Modules PM645B, PM646, and PM665 can be used for redundant processing: Two Processor Modules within one station and with common I/O modules, synchronization via high speed serial link (Figure 4-4).

　　For CPU redundancy Processor Modules PM645, PM646, or PM665 with Communication Interfaces CI630/CI631 must be used in order to avoid single point of failure, even if no Advant Fieldbus 100 communication is required.

PM665 3BDS005799R1.pdf

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