Describe SIS process output actions and the criteria for successful operation, for example, requirements for tight shut-off valves [ IEC 61511-1].
Information regarding the outputs from the SIS, a description of:
- every measurement circuit
- the architecture e.g. block and bleed
- the number of outputs
- type of input
- range of measurement
- trip levels
- feedback
Describe the need of feedback. What will happed if the response does not occur?