这里的A／D中的A，多为电流，或电压，也有温度。D／A中的A，多为电压，或电流。电压、电流变化范围多为0～5V，0～10V，4～20mA，有的还可处理正负值的。这里的D，小型机多为8位二进制数，中、大型多为12位二进制数。A／D、D／A有单路，也有多路。多路占的输入输出继电器多。有了A／D、D／A单元，余下的处理都是数字量，这对有信息处理能力的PLC并不难。中、大型PLC处理能力更强，不仅可进行数字的加、减、乘、除，还可开方、插值，还可进行浮点运算，有的还有PID指令，可对偏差制量进行比例、微分、积分运算，进而产生相应的输出，计算机能算的它几乎都能算。
NetApp X500 14x36GB 10K DS14 Shelf Network Appliance
NetApp X1201B ATM OC-3 LANE - NEW
NETAPP X287A-6PK-R5 Disk Drives,6Pack,300GB,15k,SAS,R5
One-day shipping available
NETAPP X287A-R5 6-Pack 300GB 15K SAS Disk Drives
One-day shipping available
NETAPP X287A-6PK-R5 Disk Drives,6Pack,300GB,15k,SAS,R5
One-day shipping available
NETAPP X287A-R5 6-Pack 300GB 15K SAS Disk Drives
One-day shipping available
NetApp FAS3020c Network Appliance Filer Head 2.8GHz
NetApp X500 DS14 FC-AL Disk Shelf Base with (2) PS
NetApp X550 DS14mk2 FC-AL Disk Shelf Base 2 PS
NETAPP FAS3020 Filer Head 2x DC Power Supply FAS 3020 *
1 Year Warranty! Ask about Disk Shelves! WE BUY SURPLUS
NetApp F630 Filer Head Unit
5 Year Next Business Day Warranty on All NetApp
NetApp F810 Filer Head Unit
NetApp 14 x 300gb DS14 MK2 Shelf - X276, X276A disks
