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 - SFP-GIG-BX-U - For Alcatel-Lucent - NIB

Agilestar - DGS-708 - For use in D-link - New in Box

Agilestar - OC12-SFP-LR1 - For Foundry Networks - NIB

Agilestar - EX-SFP-1GE-LX40K - Juniper - New in Box

Agilestar - SFP-100-LC-SM40 - For Alcatel-Lucent - NIB

Agilestar - SFP-DUAL-SM10 - For Alcatel-Lucent - NIB

Agilestar - FTLF1421P1BTL-AS - For Finisar - New in Box

Agilestar - FTR-1419-AS - For Finisar - New in Box

Agilestar - SFP M1000LZ-AS - For Asante - New in Box

Agilestar - SMCBGZLCX1-AS - For SMC - New in Box

Agilestar - SMCBGZSCX1-AS - For SMC - New in Box

Agilestar - SPBD-1250A4Q1RT-AS - For Delta - New in Box

Agilestar - SPBD-1250B4Q1RT-AS - For Delta - New in Box

Agilestar - ONS-GC-GE-ZX - For Cisco - New in Box