1. To develop standards for signals used in process measurement and control, to transmit information between subsystems or separated elements of systems. Such signals may be analog or digital. However ...

ISA ISA-TR50.02-Parts 3 & 4-2000, Fieldbus Standard for Use in Industrial Control Systems, Parts 3 & 4: Technical Report for Fieldbus Data Link Layer - Tutorial - Archived ISA-TR50.02-Parts 3 & 4-2000 ...