德国西门子802Dsl数控机床报F0003故障维修-上海系统维修，西门子6SN1123启动报607故障维修，西门子驱动器报608故障维修，西门子驱动器报A607故障维修，西门子驱动器报A608故障维修，西门子840D伺服驱动器报警维修，西门子840D伺服驱动器电源6SN1145坏维修，西门子数控系统840D进不了系统死机维修，西门子840D操作面板无显示维修，西门子840D数控开不了机维修，西门子840D伺服控制器6SN1123维修，6SN1118控制卡维修，6FC维修，西门子NCU过热报警维修，上电数码管显示1故障维修。
德国西门子802Dsl数控机床报F0003故障维修-上海系统维修，西门子840D系统伺服电机维修，编码器维修，刹车维修，上电关不了门维修，跳闸维修，放炮维修，滤波器维修，电源故障维修，黄灯不亮维修，红灯报警维修，CCU维修，主板维修，驱动板维修，控制板维修，功率板维修，操作系统面板维修等。NCU（6FC5357)，CCU(6FC5410)，电源模块(6FC1145)和功率模块(6FC1123及6FC1118），802D，802S/Cbaseline，PCU50及所有系列的OP，西门子数控系统802S，802C，802D，810D/840D各类部件如：驱动电源6SN1145/6SN1146系列，NCU/CCU如:6FC5357/6FC5410系列主板，轴卡6SN1118/6SN1121系列，功率模块6SN1123/6SN1124系列，各类HMI如PCU210/PCU20/PCU50/PCU70，操作控制显示面板6FC5203系6FC5357-0BB11-0AE0NCU571.2数控主板
6SN1123-1AA00-0AA0维修销售 SIMODRIVE 611 1 AXIS 15 A
6SN1123-1AA00-0AA1维修销售SIMODRIVE 611 1 AXIS 15 A
6SN1123-1AA00-0BA0维修销售SIMODRIVE 611 1 AXIS 25 A
6SN1123-1AA00-0BA1维修销售SIMODRIVE 611 1 AXIS 25 A
6SN1123-1AA00-0CA0维修销售SIMODRIVE 611 1 AXIS 50 A
6SN1123-1AA00-0CA1维修销售SIMODRIVE 611 1 AXIS 50 A
6SN1123-1AA00-0DA0维修销售SIMODRIVE 611 1 AXIS 80 A
6SN1123-1AA00-0DA1维修销售SIMODRIVE 611 1 AXIS 80 A
6SN1123-1AA00-0EA0维修销售SIMODRIVE 611 1 AXIS 160 A
6SN1123-1AA00-0EA1维修销售SIMODRIVE 611 1 AXIS 160 A
6SN1123-1AA00-0FA0维修销售SIMODRIVE 611-A/D 1 AXIS 200 A
6SN1123-1AA00-0GA0维修销售SIMODRIVE 611-A/D 1 AXIS 120 A
6SN1123-1AA00-0HA0维修销售SIMODRIVE 611 1 AXIS 8 A
6SN1123-1AA00-0HA1维修销售SIMODRIVE 611 1 AXIS 8 A
6SN1123-1AA00-0JA0维修销售SIMODRIVE 611 1 AXIS 300 A
6SN1123-1AA00-0JA1维修销售SIMODRIVE 611 1 AXIS 300 A
6SN1123-1AA00-0KA0维修销售SIMODRIVE 611 1 AXIS 400 A
6SN1123-1AA00-0KA1维修销售SIMODRIVE 611 1 AXIS 400 A
6SN1123-1AA00-0LA0维修销售SIMODRIVE 611-A/D 1 AXIS 180 A
6SN1123-1AA00-0LA1维修销售SIMODRIVE 611 1 AXIS 180 A
6SN1123-1AA01-0FA0维修销售SIMODRIVE 611 1 AXIS 200 A
6SN1123-1AA01-0FA1维修销售SIMODRIVE 611 1 AXIS 200 A
6SN1123-1AA02-0FA0维修销售SIMODRIVE 611 1 AXIS 200 A
6SN1123-1AA02-0FA1维修销售SIMODRIVE 611 1 AXIS 200 A
6SN1123-1AB00-0AA0维修销售SIMODRIVE 611 2 AXES 15 A
6SN1123-1AB00-0AA1维修销售SIMODRIVE 611 2 AXES 15 A
6SN1123-1AB00-0BA0维修销售SIMODRIVE 611 2 AXES 25 A
6SN1123-1AB00-0BA1维修销售SIMODRIVE 611 2 AXES 25 A
6SN1123-1AB00-0CA0维修销售SIMODRIVE 611 2 AXES 50 A
6SN1123-1AB00-0CA1维修销售SIMODRIVE 611 2 AXES 50 A
6SN1123-1AB00-0HA0维修销售SIMODRIVE 611 2 AXES 8 A
6SN1123-1AB00-0HA1维修销售SIMODRIVE 611 2 AXES8 A
为什么要“左零右火”？与其说“左零右火”是一种规定，倒不如说是一种约定俗成的习惯。正是这种习惯久了，就成了规定。如果非要说原因，倒有如下三点——统一接线。不管是左零右火还是左火右零，总要规定一种，从而使所有插座的零火线位置都一样。只有这样，用电器才能选择自己所需的零火线。触电概率。确实有组织做过统计，认为右手大拇指触电的概率。将右手大拇指Zui容易碰到的那个插脚做成零线，而在插头插入插座不深时，零线是不带电的。