About: http://webisa.webdatacommons.org/22101454

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The opto-isolator would be used when the 4IO board is looking at a voltage other than 5 VDC or if it looking at a voltage not supplied from the board.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com