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。

CALMINI 2005-07 Nissan Frontier 5” Lift kit (Carton 3)

Philips PM5687 TV digital sound modulator

Panasonic AC Servo Drive MQDB012AAD02 NEW 0190-15328

Tektronix TDS360 2-CH Digital Real-Time Oscilloscope

THK VLA-ST-60-12-0300 LINEAR STAGE 300MM travel W/Motor

Hybaid OmniGene Thermal cycler/power supply/program .

IAI ROBO Cylinder RCS2-SA6C-I-30 electric actuator NEW

Quad Quadalign Processor board

Quad VME-AXIS 970918-058 X,Y-Axis board

Quad VME-AXIS 970918-1-044 H1-Axis board

Quad VME-AXIS 970918-3-042 H3-Axis board

Quad VME-AXIS 970918-2-046 H2-Axis board

Quad DSP BOARD , DSP-70820-049

Quad VISION DSP BOARD BA-70820-020

base POWER three phase power controller TP4830A

Dover Instruments Air Bearing Spindle Motor & encoder

Varian thin film systems RF interface controller

JRC FTU Module ,Model CHE-168B

JRC ACU Module ,Model NCL-280A

JRC HPA Module ,Model CAH-446b

MKS 95 mm Control Throttle Valve