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。
Agilestar - 10053 - For Extreme Networks - New in Box
Agilestar - 2311204 - For use in Huawei - New in Box
Agilestar - 3CSFP97 - For use in 3Com - New in Box
Agilestar - FTLF8528P2BNV-AS - For Finisar - New in Box
Agilestar - AFCT-5764APZ - For Aglilent Avago - NIB
Agilestar - OC-5000-1111 - For Alcatel-Lucent - NIB
Agilestar - 808-38302-AS - For IMC Networks - New in Bo
Agilestar - AFCT-5760TPZ- For Aglilent Avago - NIB
Agilestar - 10063 - For Extreme Networks - New in Box
