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SIMODRIVE VSA-MODULE 4/8A
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6SN1135-1BA12-0GA0
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.组合代换
组合代换就是把同一型号的多块IC内部未受损的电路部分,重新组合成一块完整的IC,用以代替功能不良的IC的方法。对买不到原配IC的情况下是十分适用的。但要求所利用IC内部完好的电路一定要有接口引出脚。
非直接代换关键是要查清楚互相代换的两种IC的基本电参数、内部等效电路、各引脚的功能、IC与外部元件之间连接关系的资料。实际操作时予以注意:
⑴集成电路引脚的编号顺序,切勿接错;
⑵为适应代换后的IC的特点,与其相连的外围电路的元件要作相应的改变;
⑶电源电压要与代换后的IC相符,如果原电路中电源电压高,应设法降压;电压低,要看代换IC能否工作。
⑷代换以后要测量IC的静态工作电流,如电流远大于正常值,则说明电路可能产生自激,这时须进行去耦、调整。若增益与原来有所差别,可调整反馈电阻阻值;
⑸代换后IC的输入、输出阻抗要与原电路相匹配;检查其驱动能力。
⑹在改动时要充分利用原电路板上的脚孔和引线,外接引线要求整齐,避免前后交叉,以便检查和防止电路自激,特别是防止高频自激;
[7]在通电前电源Vcc回路里**再串接一直流电流表,降压电阻阻值由大到小观察集成电路总电流的变化是否正常。
厦门盈亦自动化科技有限公司
6372625电话 0592-6372625 厦门打6372625
手机 18030129917
QQ 3001408750
手机 18030129917
电话0592-6372625
QQ 3001408750
Zoom 6SN1130-1AA11-0GA0现货
9-032-217
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OKUMA SW-OSP PC-1611-0. INR- BOARD
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E4809-032-218
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OKUMA SW-OSP PC-1612-D. DATA- BOARD
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E4809-032-219
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OKUMA SW-OSP PC-1613-L. FILE- BOARD
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E4809-032-277
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OKUMA SW-OSP. PC-1630-2B RELAY CIRT
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E4809-032-293
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OKUMA OSP 2000. PC- 1638-F REED. RELAY-1
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E4809-032-295
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OSP 2000 PC-1640-H. PANEL & D-A-1
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E4809-032-319
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OKUMA PPS-8A. SERVO AMPLIFIER
E4809-032-352
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OSP 2000 PC-1656-C. POSITION READ -2.
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E4809-032-390
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PPS-60A
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E4809-032-394
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OKUMA OS P2000. PUNCHER & EC & DA.
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E4809-032-396
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OKUMA PCB
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E4809-032-452-C
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OPUS 5000
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E4809-032-496-C
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OPUS 5000 SERVO PROCESSER
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E4809-032-498-A
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Zoom 6SN1130-1AA11-0GA0现货
根据监视器产品供应商、用户端(包括工程商/集成商、设计单位、终端用户等)所做的【2008年中国监视器市场大调查】,从各主流厂家所得监视器销售额,并根据一定比例计算,获得的统计结果显示,2008年中国监视器市场达到7亿元人民币(出厂价)。
另外,据预测,有50%的人计划2009年会追加采购,平均上升15%,因此,在排除价格变化因素的情况下,可预估2009年的中国监视器市场规模达8亿元人民币。
SVC BOARD FOR BDU
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E4809-045-004
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OSP 2000 PC-1653-C. PTR & MDI-1
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E4809-045-010-B
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OSP 3000 PC-1660 E/C I/O ISOLATION
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E4809-045-035
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OKUMA PCB
E4809-045-035-C
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OKUMA PCB
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E4809-045-038
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OKUMA PCB
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E4809-045-048C
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OPUS 3000/2000 C-MOS MEMORY BOARD
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E4809-045-057
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OKUMA PCB
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E4809-045-057-D
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OPUS 5000 SVP CARD (E-PR.SENSOR)
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E4809-045-057-E
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