The A/D unit converts the analog quantity of the external circuit into a digital quantity,and then sends it to the PLC;the D/A unit converts the digital quantity of the PLC into an analog quantity,and then sends it to the external circuit.As a special I/O unit,it still has I/O circuit anti-interference,isolation of internal and external circuits,exchange of information with input and output relays(or internal relays,which is also an area of PLC working memory,readable and writable),etc.Features.
A/D单元是把外电路的模拟量,转换成数字量,然后送入PLC;D/A单元,是把PLC的数字量转换成模拟量,再送给外电路。作为一种特殊的I/O单元,它仍具有I/O电路抗干扰、内外电路隔离、与输入输出继电器(或内部继电器,它也是PLC工作内存的一个区,可读写)交换信息等等特点。
GP Sorensen EL342 Pick-Up Assembly
1951-72 CHRYSLER N.O.S.SORENSEN CH 152 RESISTOR IN ORI
1956-72 CHEVROLET N.O.S.SORENSEN TS-17 TEMPRATURE GUAGE
1964-72-CHRY-DODGE-PLY N.O.S.SORENSEN TS-20 TEMP. GUAG