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實際的物理量，除了開關量、模擬量，還有運動控制。如機床部件的位移，常以數字量表示。
運動控制，有效的辦法是NC，即數字控制技術。這是50年代誕生于美的基于計算機的控制技術。當今已很普及，并也很完善。目前，先進的金屬切削機床，數控化的比率已超過40％～80％，有的甚至更高。PLC也是基于計算機的技術，并日益完善。故它也完全可以用于數字量控制。
PLC可接收計數脈沖，頻率可高達幾k到幾十k赫茲。可用多種方式接收這脈沖，還可多路接收。有的PLC還有脈沖輸出功能，脈沖頻率也可達幾十k。有了這兩種功能，加上PLC有數據處理及運算能力，若再配備相應的傳感器（如旋轉編碼器）或脈沖伺服裝置（如環形分配器、功放、步進電機），則完全可以依NC的原理實現種種控制。
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FESTO 32mm BORE 10mm STROKE PNEUMATIC CYLINDER ADV-32-10-A NNB
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MASTERDRIVE LOCK BUSHING MDI 2012 19MM NIB
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PERCEPTRON MODULE 500-0243 REV. A
HUBBELL TWIST-LOCK DUPLEX GROUNDING RECEPTACLE 4700
FASTENAL * * SHCS 1/4 - 28 X 1"
PARKER 300 PSI 150F 1 INCH NPT PNEUMATIC PRESSURE REGULATOR, 53R525RA1
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BECKHOFF 24VDC DIGITAL INPUT MODULE KL1104
WIKA * PRESSURE GAUGE 0-100KPA * 0-15PSI
DIAMOND * SPRING CLIP * C-446603CL-08-P
CLAMPETTE * IPS REPAIR CLAMP * 4X6
EXTROL 125PSI AT 240DEG. BOILER EXPANSION TANK AX-15
TAIYO 70H-8 HYDRAULIC CYLINDER 1FA63BB195-BD
FANUC REVISION B CORDSET WE-0959-502-14 NNB
KYOHO HCI-XD HYDRAULIC CYLINDER 50X165-TC / 5XH50392
NUMATICS REPLACEMENT UNIT 081RQ100J016W NIB
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TIMKEN TAPERED ROLLER BEARING 566 NIB
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SMC AXT511B-3
J 3 7/16 BUSHING
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NUMATICS PNEUMATIC VALVE 122BA400R061D61
WEATHERHEAD * LOW PRESSURE HOSE 8 IN * 1/4 H10104
MOELLER STEAM 1/2", 250SWP, .50-11M-01, STRAINER
TEXAS INSTRUMENT EQUIPMENT PROTECTION MODULE 50AA1C1A2
BIMBA * FLAT -1 CYLINDER * FO-170.5-3RCFT
POTTER BRUMFIELD * POWER RELAY * PRD-11DHO-24
DICHTOMATIK TCM OIL SEAL 35X52X10TC NIB
0-11 BAR 0-160LBS./SQ.IN BRASS BACK FITTING GUAGE
LEVITON * LIGHT SWITCH COVER LOT OF 8 * 002-P38-W
TAIYO FLOATING JOINT F-JOINT RFH-20
GETTYS CIRCUIT BOARD, 14-0024-103
PEES RAMPTIME POSITIONING BOARD AN 115
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