SCHROFF PCB945/0/0 352MC3241 REV.3+MAP40-1005C

主营产品，备件供应，充足库存

Foxboro（福克斯波罗）：I/A Series系统，FBM全系列（现场输入/输出模块）

顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、

数据通信及处理等。

Westinghouse（西屋）：1C31系列DCS系统、CPU、OVATION系统、WDPF系统、

WEStation系统备件。

Triconex（英维思）:冗余容错控制系统、基于三重模件冗余（TMR）结构的现代化的容错控制器。

EMERSON（艾默生）:模块、卡件、驱动器等各类备件。

XYCOM：XVME系列

Bently（本特利）：3500/3300系统。

Rockwell（罗克韦尔）：ICS系统。

ABB：PM全系列DCS系统、IGCT高压变频器系列、工业机器人备件DSQC系列、INFI 90等。

Bailey（贝利）：BRC系列DCS系统等。

Allen-Bradley：1756、1785、1771、1746全系列系统等。

Yokogawa（横河）：CP系列等。

Honeywell（霍尼韦尔）：TK/TC/CC系统等。

Reliance（瑞恩）：57C系列等。

Schneider（施耐德）：140系列处理器、控制卡、电源模块等。

Modicon（莫迪康）：AS系列PLC系统备件。

Siemens(西门子)：6ES5/6ES7414/6ES7415/6ES7416系列PLC系统备件、

Siemens MOORE，Siemens Simatic C1，Siemens数控系统等。

Motorola（摩托罗拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。

XYCOM：I/O、VME板和处理器等。

GE（通用电气）：IC698/IC697全系列PLC系统、模块、卡件、驱动器等各类备件。

Yaskawa（安川）：伺服控制器、伺服马达、伺服驱动器。

Bosch Rexroth（博世力士乐）：Indramat，I/O模块,PLC控制器,驱动模块等。

Woodward（伍德沃德）：SPC阀位控制器、PEAK150数字控制器。

Generally speaking, PLC is an extremely reliable equipment with low failure rate, but it can also be damaged due to external factors.
(1) A proximity switch with 220 V working power supply shares a 4-core cable with the two lead wires of its input PLC signal contact and the 220 V power line of the proximity switch. The proximity switch is damaged at one time. When the electrician replaced it, he mistakenly adjusted the zero line of the power supply and the common line of the input PLC, resulting in burning out three PLC input points during power transmission.
(2) The zero line row of the primary system power transformer was stopped due to corrosion, resulting in the plc220v power supply rising to 380V, which burned the power module at the bottom of the PLC, and the 380 / 220V isolation control transformer was added during the rectification.
(3) PLC output common terminal label 1L, 2L, etc., operation computer for acl1n indicates, + 24 V power supply for L + m indicates simple mistake for beginners or inexperienced. If l + m is taken as the 220 V power supply terminal by mistake, the plc24 V power supply will be burnt out in the moment of power transmission.
(4) According to the author's long experience, the probability of PLC, CPU and other hardware damage or software operation error is almost zero. If the PLC input point is not caused by the invasion of strong current, it will not be damaged. If the normally open point of PLC output relay is not the external load short circuit or unreasonable design, the load current exceeds the extra range, and the contact life is also very long. Therefore, we find the electrical fault point, the key point should be placed on the PLC peripheral electrical components, do not always doubt the PLC hardware or program, which is very important for the rapid repair of defective equipment, rapid recovery of production, so the author talked about the PLC control circuit electrical fault maintenance, the key point is not in the PLC itself, but the PLC control circuit in the peripheral electrical components.