目前，在连续型流程生产自动控制（PA）或习惯称之谓工业过程控制中，有三大控制系统，即PLC、DCS和FCS。它们各自的基本特点如下:
1 PLC
（1）从开关量控制发展到顺序控制、运送处理，是从下往上的。
（2）连续PID控制等多功能，PID在中断站中。
（3）可用一台PC机为主站，多台同型PLC为从站。
（4）也可一台PLC为主站，多台同型PLC为从站，构成PLC网络。这比用PC机作主站方便之处是:有用户编程时，不必知道通信协议，只要按说明书格式写就行。
（5）PLC网格既可作为独立DCS/TDCS，也可作为DCS/TDCS的子系统。
（6）大系统同DCS/TDCS，如TDC3000、CENTUMCS、WDPFI、MOD300。
（7）PLC网络如Siemens公司的SINEC—L1、SINEC—H1、S4、S5、S6、S7等，GE公司的GENET、三菱公司的MELSEC—NET、MELSEC—NET/MINI。
（8）主要用于工业过程中的顺序控制，新型PLC也兼有闭环控制功能。
（9）制造商:GOULD（美）、AB（美）、GE（美）、OMRON（日）、MITSUBISHI（日）、Siemens（德）等。
公司主营产品有:AB,ABB,GE,西门子,力士乐，施耐德,福克斯，等工业自动化控制配件及各种停产备件。诚信经营，质量可靠，请放心购买，我们将竭诚为您服务！
Warner Electric SLO-SYN Motor SM-200-0020-HT 1.8 VDC
Wasco (1) P110-31W3A/9890 (1) P110-35S3B-X/9770 (1) P110-55W3B/6752 Switchs 3
Wasco Dual Vacuum Switch UHP169-31W2B-X/20023 500 torr 1A 115V
Wasco P110-51S2B/7342 Pressure Switch UN
Wasco Pressure Switch P110-31W3A/6341 30PSIG 1A 115VAC 6PSIG Incr.
Wasco Pressure Switch P110-31W3A/9890 30PSIG 1A 115VAC 6PSIG Incr.
Wasco Pressure Switch P110-55W3B-X/1149 80PSIG
Wasco Pressure Switch P110-55W3B-X/1277 80PSIG
Wasco Pressure Switch P110-55W3B-X/1421 90PSIG Dec. 5A 250 VAC
Wasco Vacuum Switch P110 35S3B-X/9770 3PSIG Decreasing 5A 250VAC
Watlow 146E-2K3F-3100 Type K Temperature Controller
Watlow 240V 200W Firerod Cartridge Heater 0228 07/08 G5E16 3M Cord (Quantity 5)
Watlow 93 93AA-1CD0-00RG Temperature Control
Watlow 96 96B1-CCAR-00RG Temperature Controller *UN*
Watlow 965A-3CD0-00RG Temperature Control
Watlow Anafaze PPC-TB50 Open Type Process Control Board
Watlow DIN-A-MITE DC1T-20L0-0000 Type4 Enclosure Solid State Process Control
Watlow DIN-a-mite Solid Power Controller DC1C-5024-C000
Watlow DIN-a-mite Solid Power Controller DC1C-5060-K2SO
WATLOW DM1V-5024-F0S0 DIN-a-mite Solid State Power Control
Watlow Electric 125H114A3A Heater 208V 2024W
Watlow Electric 128QC092AX-3065A & 128QC092AX-3065 Heater Coil Lot of 2
Watlow Firerod 0030M J1E52 –HR3 240V 200W Heater Lot of 13
Watlow RBJB0TA024BA130 Cartridge Heater Quantity 5
Watlow Silicon Rubber Heater 2”x15” 240V 150W 020150C2
Watlow Solid State Power Controller DIN-a-mite DA10-24C0-0000 100-240V
Watlow Solid State Relay CZ34-A24V-AC10
Watlow Temperature Controller Model 93BB-1CA0-00RG
WATTS F75-03BJ Pneumatic Filter 150 PSI
Wavelength Electronics MPL Series MPL7500 Laser Diode Driver
Wavetech CLM 1000 Cable Leakage Meter
Wavetech PM Power Detector 13786 1MHz-18GHz Sensor Probe
Wavetek Stealth Sweep Meter 3SR with Case
Weidmuller Connect Power 992889 Switchmode Power Supply
Weigel PQ 48k, EQ 48k Volt Meter Lot of 2
Weigh-Tronix Inc. Dillon Force Gauge 50lb cap. 0.5lb div. w/ case and manual
Weinschel Engineering Model 40-6-34 High Powered Fixed Coaxial Attenuator
Weir SMS 50/5 Power Supply Serial #645231
Welch Allyn AMD 300s Imaging & Illumination Platform Video Otoscope Episcope
Wentworth Laboratories PR-0195 Micro-Positioner
Whedco IMC-1130-1-A Intelligent Motor Controller
Whitman Controls P119G-3H-F12LS Vacuum Switch
Wieland Power Supply P1 24-10 Aliment AV.Interr Switch IN BOX
Wika 0-100 PSI Pressure Gauge Lot of 2
Wika 0-3000 PSI Dry Pressure Compressed Gas Gauge
Wika 111.10 1.5” 30INHG VAC 1/8”NPT CBM U-Clamp Gauge LOT 10
Wilkerson P16-02-000 A C01 Regulator with SMC 160psi Gauge
Winfred M. Berg 1/32 Flex Gear Drive Chain 2ft Un Surplus Lot of 18 32GCF
WINNOV PCBA 5000 15 Video Editing Card
WinSystems PCM-SX PCMSX-2801L Brooks Automation Board PCMSX-2001L
WinSystems PCMSX-2801E Brooks Automation Board
WinSystems PCMSX-2801G Brooks Automation Board
WinSystems PCMSX-2801J Computer Board
Woodhead DN3-104-2-e 490-1705 Board
Woodward 24 Channel Field Terminal Module 5437-687
Woodward 5437-672 Netcon Field Terminal Module
Woodward 5466-355 Remote Transceiver Interface Remote XCVR
Woodward 5501-371 Micronet Simplex MPU & AIO FTM 5458-093
Woodward 5501-466 Rev. A Power Supply Micronet
Woodward Ethernet Interface FTM 5453-754
Woodward Governor Company 5464-643 Rev. D D/I Module
Woodward Governor Company 5466-353 Rev. A Transceiver Module
Woodward Governor Company 5503-267 RT S/0 Module Netcon IIIB 3 9 pin
WWG Acterna Advanced Network Tester ANT-200SE
Xandex Model B611d Inker Marker Assembly Joystick 12V
XP DNR120T Power Supply DNR120TS24 24VDC 120W
XP DNR240 Power Supply DNR240PS24-1 115/230Vac 24 VDC
XP Flexpower MN: X7-3U3U-0012-XD0205A X7-XD0205A Power Supply
XP Power DNR18 Power Supply DNR18US24 100-240 VAC
XP Power ECL25US09-S Switch Mode Power Supply
XP Power ECL30UT03-S 100-240V~0.8A 50-60Hz Converter
XP Power VCS70US24 100-240V Power Supply IN BOX
X-Tel Communications Scan Module
X-Tel Communications X-2 Scan Module & HCU
Yamaichi AB120QF05ZP10M1 Test Socket
Yamaichi NP276-59608 Socket 304-2-023-P11 W/Map Lot of 2
Yamamoto 840091 type MS65L Differential pressure switch
Yamamoto Manostar WO-81 PCS 50 Pressure gauge in box
Yamatake HPJ-D22 Photoelectric Sensor Switch
Yamatake-Honeywell MX100GT78 H.02 Input Controller 32Pt.
Yamatake-Honeywell MX100PT12 H.01 32Pt. Transistor Out
Yaskawa AC Servo Motor SGM-01U3B2L 100W 200V 3000r/min
Yaskawa AC Servo Motor SGMAH-A3A