About: http://webisa.webdatacommons.org/145619460

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	I/O circuitry 602 may be optionally included to provide an output in any desired format such as TTL, or other logic levels such as RS232, 4-20 mA, make/break, bi-level, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com