福州卓凯电子科技有限公司是一家全球贸易合作伙伴。公司通过多年的努力，已在锅炉控制、化工、水泥、水、造纸印刷、制机械、起重、食品饮料、环保、冶金、激光机床、金属切削机床及专用机床等多个行业积累了丰厚的控制系统解决方案，是一家集科、工、贸于一体的综合性自动化公司。
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3-Changeover Contact as photo, sn:7922, NEW Promotion
ABB CP-E24/20
SEIWA OPTICAL Correct Tokyo 0
在我们刚一开始接触到51单片机的时候对P0口必须加上上拉电阻，否则P0就是高阻态。对这个问题可能感到疑惑，为什么是高阻态？加上拉电阻？今天针对这一概念进行简单讲解。高阻态高阻态这是一个数字电路里常见的术语，指的是电路的一种输出状态，既不是高电平也不是低电平。如果高阻态再输入下 电路的话，对下级电路无任何影响，和没接一样，如果用万用表测的话有可能是高电平也有可能是低电平，随它后面接的东西定。高阻态的实质电路分析时高阻态可做开路理解，你可以把它看作输出（输入）电阻非常大。
5KW 400V in box
1PC NEW TOSHIBA IGBT MG400Q2YS60A Power supply module
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PARKER COMPUMOTOR OEM6200 2-AXIS INDEXER PCB as photo, sn:3002, untested, dφm
Parker Compumotor GV-U6E-NK, GV Gemini Servo Drive, sn: 0043
VERMES MDC 3200A, Microdispensing missing accessories as photo,sn:1589, DHLtoUS
CCS PFB2-20W30-F-J, LED Light Controller & DC Supply as photo, sn:A042, dφm cmb
CCS PFB2-20W30-F-J, LED Control& DC supply& SCHOTT Light Guide as photo, sn:A042
CCS PD-3024-2 & HLV-2M-RB, 2-channel Digital Control LED, as photos,SN:0079,dφm2
CCS PD-3012-2, Lamp controller as photo,sn:2406, Tested, DHLtoUS
3/4P-M12P1 photoelectric sensor In Box Free Shipping
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漏电开关只有在有人触电时才会动作。错。漏电开关－漏电断路器，是配电系统中常用的电气元件。人体电阻比较大，漏电电流达不到漏电保护器动作值时不会跳闸。家用漏电保护器漏电电流为30MA。只要漏电电流达到30MA漏电开关会立刻动作。30MA=0.03A。当发生触电时，电阻超过多少欧姆漏电开关不会跳 上计算的是 值，超过这个电阻，触电时漏电保护器就不会跳闸。
Yaskawa SGMAS-02A2A2C-Y1, AC Servo motor as photo, sn:0001
SCANLAB dyn Axis M, Galvanometer scanners XY Mirror as photo, sn:5052, dφm
SCANLAB dyn Axis M, Galvanometer scanners & Controller as photo, sn:1076
Cognex DM100S, Barcode Code Reader Sensor as photo, sn:0073
NAVITAR 12X, Zoom Lens as photo, sn:2074, For part not working, need clean, dφm
National Instru nterface VME Card as photo, sn:ADBD
5x, Machine Vision as photo, sn:3329
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实践中，对于额定电压，一定要仔细确认，不能凭经验。第四，原理。它的大致原理跟灯泡没多大区别。灯开关闭合，灯工作；灯开关断开，灯熄灭。这样做对比，比较形象些。真正的原理，是电磁感应。有时，只要把动作的先后顺序记住了，思路自然就清晰了。如果不懂内部构造，可以拆个旧的看一看，和上面的图片差别不大。交流接触器的原理搞懂了，各种继电器，也就容易理解了。第五，方法。接触器的类别，数不胜数。把每一种低压配件都写出来，不现实。
6 CR, Digital input card as photo, sn:0034, dφm
SMC ZM101H-A5LZ-X111, Vacuum Value Module Mounted as photo, NEW in BAG
Keyence VT3-Q5S, Interface Touch Panel as photo, sn:0070, Tested, sφs
KEYENCE VT3-Q5M, Touch Panel Dis y ted, Promotion
IAI RCA2-TWA4N-I-20-2-30-A1, electric cylinder as photo,sn:5138, DHLtoUS
3/4P Photoelectric switch In Box Free Shipping
1PC New For Leuze ET318B
5x, Lens missing Coaxial as photo, sn:14D3
002mm as photo, sn: set C, dφm jer11
PCI0 PZT WD MODULE as photo, sn:4754, Unknown data
用两个或非门交叉耦合，也可构成基本RS触发器，其电路结构和逻辑符号。图与或非门构成的基本RS触发器RD和SD分别为复位（置0）和置位（置1）端，它们均是高电平有效。其信号输入也有四种组合。当RD=0，SD=1时，触发器置1；当RD=1，SD=0时，触发器置0；当二者都为1时，触发器状态不确定（为非法电平）；当RD=0，SD=0时，触发器保持原状态不变。与普通门、受控门电路相比，前者输入为常态信号，输出状态取决于即时输入；后者输入为“瞬态”信号，有触发特性，输出有保持功能，输出为输入的“过去时”，输入条件 ower Panel Tested in Good Condition
1 PC Used For B&R 4PP420
5HP 1PHA
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1PC Delta VFD Inverter VFD007L21B free shipping
1PC Delta Unmanaged Ethernet Switch DVS-G005I00A 1-Year Warranty
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1Pc Delta Servo Drive ASD-B2-3023-B 1-Year Warranty
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1PC Delta Servo Drive ASD-A2-
