IC697PWR710
IC697PWR710
IC697PWR710
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设计这种步进阶梯时要注意以下问题:(1)在一个自动工作循环内,移位寄存器的移位数据输入端IN只允许起动时输入一个单脉冲信号。也就是说起动时只能输入移位数据“1”。步进阶梯的工作原理就是根据输入的数据“1”,在移位寄存器中逐步向高位移位来实现逐步得电和逐步失电。所以输入端IN要串联每个移位输出位的常闭触点;(2)移位寄存器对移位脉冲输入端开关的抖动非常敏感。若开关抖动一次,相当于多输入了一个移位脉冲,移位数据“1”随之多移了一位。由于接点式开关被触发时难免产生抖动。为这种影响,在移位脉冲输入端的步1输入回路,串联移位寄存器0位(本例为M20)的常闭触点,一旦移位数据移入M20位,便断开步1的输入回路;而从步2开始,每步的输入回路也要串联上一位的常开触点。例如步2的输入回路要串联上一位M20的常开触点。这样,当移位到步2转步主令信号对应的M21位时,便立即断开步2的输入回路。采用这样的移位脉冲输入回路结构,可确保每步的转步输入信号持续时间只有PLC的一个扫描周期(一般只有几Ms),因开关的抖动时间远大于PLC的一个扫描周期。所以可有效地开关抖动的影响。
ALLEN BRADLEY CONTACTOR 700-N600A24
SMC MGPM50TF-50Z
SICK NTA6-N312 REGIS SCANNER NTA6N312 NTA6
SMC MGPM50TF-25Z
SKF BEARING SKF-SAF-22524CA SIZE 4-3/16" NEW
Winzer Female Terminal Pin 12124580 14-16 W/PTERM LOOSE 1000 PC
New Browning T55LX 1 1/8
NEW ABB PRESSURE TRANSMITTER 544TB01341A0110-1000-56412
Martin Sprocket Stainless Steel 40B30SS SS40B30X012K 3/4" 3/4
SIEMENS MILLTRONICS PROBE 7MH71431AA50 1P7MH7143-1AA50 TSP33 Z1003261
12" Long 2" ID Stainless Steel Flexible Coupling 2150 F316 316 SA182 B16.5 SS
Flow components 12" Long 2" ID Stainless Steel Flexible Coupling 304 SA182 B16.5
ABB Drive ACS 500 DISPLAY Readout ACS500 60037663B 9432 362
NEW ROSEMOUNT PRESSURE TRANSMITTER 10140-55 RTD10 PT100
CONTROL CONCEPTS SPEED SWITCH CI-2120-IM/FK
MORSE 8020 FB 2-15/16" BORE 20 TOOTH
ENERTROLS Shock Obsorber, SNALD11/8X4p567 412324, SNALD 1-1/8 x 4 P567
SUPERIOR ELECTRIC SLOSYN SS421G3
ABB ASEA RXMH 2 24V Combiflex Relay RXMH2 RK 223 06
SICK NTA6-N312 REGIS SCANNER NTA6N312 NTA6
Heizelement 7 kW 3x 480V 011.325.016-10 Daetwyler ET1210199
IDEAL 12" Long 2" ID Stainless Steel Flexible Coupling SA182 B16 150 304 SS
GENERAL ELECTRIC CIRCUIT BOARD CARD IC3600SCBD2A 68A989109G1 REV. B
FOXBORO 761CSA-3A-1
INTRALOX SERIES 1100
Athena Controls Temperature Temp Controller 4000-F-E Range: 0-2000F K 120/240vac
CONDOR POWER MTC-253-0515F DC
MARTIN D12B25 2 3/4" BORE 25 TOOTH
ACDC Electronics Emerson 800 watt REV803B-2330-9002
Hoffman 12" Telescope Fitting Galvanized Steel F1212GAGV
CLEVELAND C33187 HSS End Mill, 2 In D, 2 In Cut L Center Cutting 360270
SKF 65037 Oil Seal New Grease Seal CR Seal CR-65037-USA
PACIFIC SCIENTIFIC P22NRXA-LNN-NS-00
ELECTROSWITCH 8847CB-001
HOFFMAN Straight Section Wireway Trough Galvanized 60" F88G60
Edwards Adaptahorn Horn B-N-8590-E5
MARTIN E50B25H 1" BORE 25 TOOTH
MARTIN D12C25 2 3/4" BORE 25 TOOTH
TAYLOR THREADED RELIEF VALVE 82D9241311 5000 PSI 3/4" STEEL 224gpm
FISHER ROSEMOUNT DIAPHRAM SIZE 60 19" OD 3 9 84 RPP 3-9-84-RPP
HONEYWELL 14004214-001
BEARING DISTRIBUTORS GEAR TST1680 TST-1680 5/8"
ACME ELECTRIC CORPORATION 5000VA TRANSFORMER TA-1-81221
Donaldson Air Cleaner Filter G092401
INTRALOX SERIES 1100 FLUSH GRID POLYPROPYLENE BELT 4" x 25' GD-8921-1
MASKA PULLEY 3B11.0 3B110 3B110 (SK) 3B110SK