另外要注意,一些高密度輸入點(diǎn)的模塊對(duì)同時(shí)接通的輸入點(diǎn)數(shù)有限制,一般同時(shí)接通的輸入點(diǎn)不得超過總輸入點(diǎn)的 60 %; PLC 每個(gè)輸出點(diǎn)的驅(qū)動(dòng)能力( A/ 點(diǎn))也是有限的,有的 PLC 其每點(diǎn)輸出電流的大小還隨所加負(fù)載電壓的不同而異;一般 PLC 的允許輸出電流隨環(huán)境溫度的升高而有所降低等。在選型時(shí)要考慮這些問題。
對(duì)于新行業(yè)而言,譬如風(fēng)電、太陽(yáng)能等新能源領(lǐng)域,發(fā)展迅速,但對(duì)全局而言,仍然是星星點(diǎn)點(diǎn),沒有辦法成為影響全局的助推力。新市場(chǎng),還未形成。
在小型PLC市場(chǎng),主要格局還是西門子、三菱和Omron三廠家鼎力的態(tài)勢(shì),西門子憑借S7-200CN本土化價(jià)格優(yōu)勢(shì)及相對(duì)良好的貨期,在2015年銷售額方面仍然全面超越其他品牌保持。
中型PLC是各家追逐的戰(zhàn)略重點(diǎn)。幾乎每家都在加強(qiáng)在中型PLC方面的產(chǎn)品缺失,以期在西門子獨(dú)大的情況下分得一杯羹。不過在短期內(nèi),還未看到改變格局的力量。
羅克韋爾、施耐德、西門子在大型PLC市場(chǎng)依然三分天下;中型PLC市場(chǎng)西門子仍然一枝獨(dú)秀;大中型PLC的市場(chǎng)格局未曾改變,但是需要注意一些潛在力量。
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SIEMENS SIRIUS AUXILIARY CONTACT BLOCK 10A (LOT OF 7) PN# 3RH1921-1CA10
Paper Converting Machine CO 84670 Gearbox, Ratio 5:1
Allen Bradley Inductive Proximity Limit Switch - 871L-XCB40S40 Series A
Omron G3NA-420B Relay
Hyde Park SuperProx Sensor - SM550A-164
Moeller Electric Contactor with 22 DIL M Relay - DIL1AM-G
OMEGA 4-20 mA dc output module, FLSC790-MA
Honeywell SS Support Tube - 31063261
SMC Exhaust Cleaner - AMC520-06
Meridian Instruments Controller with M.S.T. 9002/S, M.S.T. 9040 & M.S.T. 9080
P1-25/I/SVB-SW Moeller Switch , Klockner Moeller
FIFE CABLE ASSEMBLY 6 PIN MALE/FEMALE CONNECTORS 35FT PN# 84582-420
Warner Electric Brake Magnet - 5311-631-024
COBRA ELECTRONICS MICROTALK 2 WAY RADIO PN# FRS110-2
Square D Safety Switch/Disconnect H363AWK
Brook Compton AC Motor, Model 1AN, 1/1.5 HP, 1450/1740 RPM - 2M00057
GROVE GEAR FLEX-IN-LINE SPEED REDUCER, PN# LMQ-30
Gemu Industrial Diaphram Valve - Size 50 - 687050D8040171-1502
Firestone Industrial Double Convoluted Air Spring -W01-M58-6978
Eaton POW-R-WAY 3 Circuit Breaker Enclosure - P3BFWF3080GN
Leeson Permanent Magnet D.C. Gear Motor - CM31D18NZ54C
SKF Flange Bearing - FY 2.1/4 TF
Tri-Tronics Smarteye Pro Red - SPBRC
TELEMECANIQUE NON REVERSING CONTACTOR WITH 24VDC COIL PN# LC1D25BD
TELEMECANIQUE LIMIT SWITCH MULTI-DIRECTIONAL HEAD PN# ZCK-D06
ALLEN BRADLEY PANELVIEW 600 COLOR KEYPAD DH+/RS-232 PRINTER, SER B PN# 2711-K6C8
DODGE P2B-VSCB-100 PILLOW BLOCK UNIT TWO BOLT 1" BORE PN# 123596
Omega Wireless Meter Scanner - ZED-TC-LCD
Magnetrol 09-8912-001 Sentinal PS PCB Circuit Board B205146
ATHENA SERIES 16 TEMPERATURE PROCESS CONTROLLER MODEL# 16-PC-S-0-20-00
HONEYWELL SENSOTEC DV-10 IN LINE AMPLIFIER 15-28VDC PN# 060-6881-02
MGE UPS Systems Topaz P8 Power Conditioner - 68200-04S
Sensotec Pressure Transducer 5000PSIG 9-28VDC 15/PSI - 060-C065-02
Pepperl & Fuchs Inductive Sensor - NBB 5-18GM50-E0
Nachi Solenoid Valve - SS-G01-A5-R-C115-E31
CUTLER HAMMER 600VAC CURRENT TRANSFORMER PN# 9917D43H04
DWYER PHOTOELECTRIC PRESSURE GAUGE PN# 3004
Festo EMMZ-25-15-P-A Compact Cylinder - 158679
Alpha Wittenstein 3:1 Ratio Gearbox - SP 100S-MC1-3-1G1-2K-PS1
SIEMENS MOTOR STARTER 24VAC/DC, MISSING AUX CONTACT & TERMINAL-3RA6120-1AB32
FESTO ADN-25-30-I-P-A COMPACT CYLINDER BORE 25MM PN# 536264
Hot Melt Glue Hose - 757730B
DODGE P36-8M-30-SH HTD QUICK DISCONNECT SPROCKET PN# 110727
Allen Bradley Contactor - 100S-C12ZJ05C Series A
Allen Bradley 2090 Ultra Shunt Module - 2090-SR020-36 Series A
Lenze Gearbox w/ Direct Mount AC Motor - GKR04-2MVBR-063-32
Process Measurement 180RL-801 Current Transformer
OMEGA FLOW METER 1/2" NPT, 3500 PSI PN# HFL6305ABR
Jefferson Electric 211-0051-120 Powerformer
Alpha Gear Box - SP 140S-MC1-3-1K1-2K-PSI
Hystar Relief Modular Valves Part# MBA-03-C
Siei Circuit Board - ECS 1213
CONTEMPORARY CONTROLS ARCNET 20020 PC TWISTED PAIR BUS NIM PN# PCX20-TPB
REXROTH LINEAR GUIDE RAIL, 667,50 MM - R160530431
DEUBLIN MONOFLOW ROTARY HYDRAULIC union?3/8" BSP RH ROTOR PN# 55-041-094
Cutler Hammer 91-01759-04 AB Acceleration Module
Sew Eurodrive Gearbox SA57DT90S4 with Sew Eurodrive Motor DFT90S4
Triconex Cable 4000094-110
Gates Poly Chain GT Sprocket - 8MX-50S-21
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