目前很多现代化的工业应用需要更多的功能要求,如网络连接、设备互用、企业数据集成等,这些都远远超过了传统的、基于离散逻辑控制的PLC所能提供的功能,想要基于PLC的系统实现这些功能,必须用单独的处理器、网关获转换器,运行于独立的PC软件中间件以及企业系统级的专用软件进行系统集成。
PC-Based在自动化应用初期被PLC阵营高度质疑,至今市场上仍有相关疑虑,主要问题有稳定性、可靠性和程式设计环境不稳定三点,因此也有工程师将PLC配合PC使用,不过这在系统整合上比较麻烦。
为了解决PLC和PC-Based的整合问题,美国研究机构ARC提出了PAC架构的控制器(可编程自动化控制器),PAC融合了PLC和PC-Based两种技术,在PC层面,会大量应用嵌入式技术,拥有使用软体来定义硬体的能力就是其一。
拥护者认为,PAC的价值在于所有部件均按照软件和硬件集成灵活、方便、成本为出发点,从而使得用户设备的生命周期成本较低,资产的投资回报率提高,资产所有者总成本下降。
当然,也有观点认为,PAC仍属于PC-Based产品,只是换了另外一种包装。但就市场整体面来看,PAC的确已经逐渐成形,包括西门子在内的大厂,均已纷纷推出产品,国内像研华也推出了全新一代的PAC控制器APAX-5000系列。
BARBER COLMAN A-11785-0-1 USPP A1178501
Eurotherm Barber Colman GYZJ-935 Impressor (New Factory tested and packaged)
One-day shipping available
BARBER COLMAN A-11012-2 USPP A110122
Barber-Colman DYNZ 10100 Generator Phase-Lock Auto-Synchronizer
BARBER COLMAN A-13399-3 USPP A133993
Barber Colman 80JB-30001-001-V-00 _ Maco Pac MACO 8000 PARISON CONTROL MODULE
One-day shipping available
BARBER COLMAN MA-419 USPP MA419
BARBER COLMAN A-11783-2-1 USPP A1178321
BARBER COLMAN MA-416-0-0-2 USPP MA416002
Barber Colman 80HA-00001-001-0-00 _ P/F Module _ 80HA00001001000 _ 81ZZ-02000
One-day shipping available
Barber Colman MACO 6500 A-60068-0-1 *SEALED* A6006801
One-day shipping available
Barber Colman A-13766-302 MACO 4000 Data Handler 101c-ks
One-day shipping available
Barber Colman A-13766-302 MACO 4000 Data Handler 101c-ks
One-day shipping available
BARBER COLMAN MACO 4000 _ A 60010 103 _ A60010103 PCB
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BARBER COLMAN ADDA900312 FNFP ADDA900312
BARBER COLMAN 5653-06954-330-0-00 NSPP
BARBER COLMAN A-11001 USPP A11001
(8114) Barber Colman Actuator MC-441-105-0-1 240-208V 50/60Hz (8114)
BARBER COLMAN A-11708-201 USPP A11708201
BARBER COLMAN A-12239-100-1 USPP A122391001
BARBER COLMAN A-13405-1 USPP A134051
BARBER COLMAN A60083-1 NSPP A600831
BARBER COLMAN MACO 4000 AC Output Board A-13402
BARBER-COLMAN 527Z TEMPERATURE CONTROLLER LOT
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BARBER COLMAN A-13400-104 USPP A13400104
BARBER COLMAN 80FC-10001-001-0-00 **RECONDITIONED**
BARBER COLMAN A-13396-9 USPP A133969
BARBER COLMAN A-13397-2 USPP A133972
BARBER COLMAN A-13408-002 USPP A13408002
BARBER COLMAN EA75-00000-003000 NSFP EA7500000003000
BARBER COLMAN GCMA-106-5-0-1 USPP GCMA106501
Barber Colman Maco Pac Temperature Module Maco 8000
(T3-2) 1 BARBER COLMAN 80FA-10002-001-0-01 POSITIONING MODULE MACO 8000. T3-2.
BARBER COLMAN 10Q3-OJC00-000-4-00 NSFP 10Q3OJC00000400
BARBER COLMAN MZ2A-105-0-1-1 USPP MZ2A105011
BARBER COLMAN MAQ6-60901 USPP MAQ660901
Barber Colman Company 5653-089E8-340-0-00 Temperature Controller - Used
One-day shipping available
BARBER COLMAN MACO 4000 Analog Board A-13399-1
Barber Colman VB-9313-0-4-4 Bronze 3-Way Mixing Valve 1/2" NPT
BARBER COLMAN A13408-1-1 *USED*
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BARBER COLMAN 585A-20016-000-0-00 USPP 585A20016000000
BARBER COLMAN A-13402-2 USPP A134022
BARBER COLMAN LCMA-116-0-0-1 USPP LCMA116001
BARBER COLMAN A-13396-4-1 USPP A1339641
BARBER COLMAN A-60083-1-1 USPP A6008311
BARBER COLMAN A-60201-100 USPP A60201100
BARBER COLMAN A-13402-3 USPP A134023
BARBER COLMAN A-13396-3 USPP A133963
BARBER COLMAN A-60050-1 USPP A600501
BARBER COLMAN MA-407-701-0-4 USPP MA40770104