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 - 10G-XFP-ER - For Foundry Networks - NIB
Agilestar - 10GBASE-ER - For Enterasys Networks - NIB
Agilestar - CWDM-XFP-1471- For Cisco - New in Box
Agilestar - CWDM-XFP-1491- For Cisco - New in Box
Agilestar - CWDM-XFP-1511 - For Cisco - New in Box
Agilestar - CWDM-XFP-1531- For Cisco - New in Box
Agilestar - CWDM-XFP-1551 - For Cisco - New in Box
Agilestar - CWDM-XFP-1571 - For Cisco - New in Box
Agilestar - CWDM-XFP-1591 - For Cisco - New in Box
Agilestar - CWDM-XFP-1611 - For Cisco - New in Box
