目前很多現(xiàn)代化的工業(yè)應(yīng)用需要更多的功能要求，如網(wǎng)絡(luò)連接、設(shè)備互用、企業(yè)數(shù)據(jù)集成等，這些都遠遠超過了傳統(tǒng)的、基于離散邏輯控制的PLC所能提供的功能，想要基于PLC的系統(tǒng)實現(xiàn)這些功能，必須用單獨的處理器、網(wǎng)關(guān)獲轉(zhuǎn)換器，運行于獨立的PC軟件中間件以及企業(yè)系統(tǒng)級的專用軟件進行系統(tǒng)集成。
PC-Based在自動化應(yīng)用初期被PLC陣營高度質(zhì)疑，至今市場上仍有相關(guān)疑慮，主要問題有穩(wěn)定性、可靠性和程式設(shè)計環(huán)境不穩(wěn)定三點，因此也有工程師將PLC配合PC使用，不過這在系統(tǒng)整合上比較麻煩。
為了解決PLC和PC-Based的整合問題，美國研究機構(gòu)ARC提出了PAC架構(gòu)的控制器（可編程自動化控制器），PAC融合了PLC和PC-Based兩種技術(shù)，在PC層面，會大量應(yīng)用嵌入式技術(shù)，擁有使用軟體來定義硬體的能力就是其一。
擁護者認(rèn)為，PAC的價值在于所有部件均按照軟件和硬件集成靈活、方便、成本為出發(fā)點，從而使得用戶設(shè)備的生命周期成本較低，資產(chǎn)的投資回報率提高，資產(chǎn)所有者總成本下降。
當(dāng)然，也有觀點認(rèn)為，PAC仍屬于PC-Based產(chǎn)品，只是換了另外一種包裝。但就市場整體面來看，PAC的確已經(jīng)逐漸成形，包括西門子在內(nèi)的大廠，均已紛紛推出產(chǎn)品，國內(nèi)像研華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
BARBER COLMAN Y7MP-A2000 USPP Y7MPA2000
BARBER COLMAN 5756-6A029-430-3-00 USPP 57566A029430300
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
One-day shipping available
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*
One-day shipping available
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