Description
DCS系统根据各硬件的功能不同,其故障可分为人机接口故障和过程通道故障,人机接口主要指用于实现人机联系功能的工程师站、操作员站、打印机、键盘、鼠标等;过程通道主要指就地总线、通道、过程处理机、一次元件或控制设备等。人机接口由多个功能相同的工作站组成,当其中一台发生故障时,只要处理及时,一般不会影响系统的监控操作。过程通道故障发生再就地总线或一次设备时,会直接影响控制或检测功能,因而后果比较严重。
PARKER/SCHRADER BELLOWS PRESSURE REGULATOR 035662000B
2683 NEW Parker 201673 Pressure Regulator
PARKER HYDRAULIC PRESSURE REDUCING VALVE V-21 FT
New Parker CPOM2AAV55X Pilot-Oper. Pressure Check Valve
Expedited shipping available
NIB PARKER BVHP16SSS1NA HIGH PRESSURE BALL VALVE
Expedited shipping available
Parker Hydr. Pressure Reducing Module D03 # BD03PNR-A
Parker 035643000B Pressure Regulator NEW Free Shipping
One-day shipping available
Parker hydraulic cylinder model C2H19 PRESSURE 3000
Parker 3/8″ S. Air Dual Pressure Switch New