1757-SRM 亿问如触电

1757-SRM 亿问如触电

分析原有系统的工作原理 

了解被控设备的工艺过程和机械的动作情况，根据继电器电路图分析和掌握控制系统的工作原理。

2．PLC的I/O分配 

确定系统的输入设备和输出设备，进行PLC的I/O分配，画出PLC外部接线图。

3．建立其它元器件的对应关系 

确定继电器电路图中的中间继电器、时间继电器等各器件与PLC中的辅助继电器和定时器的对应关系。

以上（2）和（3）两步建立了继电器电路图中所有的元器件与PLC内部编程元件的对应关系，对于移植设计法而言，这非常重要。在这过程中应该处理好以几个问题：

1）继电器电路中的执行元件应与PLC的输出继电器对应，如交直流接触器、电磁阀、电磁铁、指示灯等；

2）继电器电路中的主令电器应与PLC的输入继电器对应，如按钮、位置开关、选择开关等。热继电器的触点可作为PLC的输入，也可接在PLC外部电路中，主要是看PLC的输入点是否富裕。注意处理好PLC内、外触点的常开和常闭的关系。

SQUARE D LAL36350 THERMAL-MAGNETIC MOLDED CASE CIRCUIT BREAKER 350A 350 AMPS  

Square D LAL36350 Circuit Breaker - NIB (  IN BOX)

SQUARE D LAL36350 Circuit Breaker

Square D LAL363008041 3 Pole 300 Amp Circuit Breaker

Square D LAL36300 Circuit Breaker - NIB (  IN BOX)

SQUARE D LAL36300 Circuit Breaker

Square D LAL36250 Circuit Breaker - NIB (  IN BOX)

SQUARE D LAL36250 Circuit Breaker

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Square D LAL36200 Circuit Breaker - NIB (  IN BOX)

SQUARE D LAL36200 Circuit Breaker

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Square D LAL34400MC Circuit Breaker -   Surplus

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Square D LAL34225MC1021 Circuit Breaker -   IN BOX

SQUARE D LAL-2640036M   LAL2640036M

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Square D LAL26225MB 225 Amp 2 Pole Adjustable Trip Circuit Breaker (CIR2066)

SQUARE D LAL26225 Circuit Breaker

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SQUARE D LAL26200 Circuit Breaker

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SQUARE D LAF3640032MV1027   LAF3640032MV1027

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Square D LA36350 Circuit Breaker - NIB (  IN BOX)

Square D LA36350 Circuit Breaker -   Surplus

Square D LA36300 Circuit Breaker - NIB (  IN BOX)

Square D LA36300 Circuit Breaker -   Surplus

Square D LA36250 Circuit Breaker - NIB (  IN BOX)

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SQUARE D LA26400AB Circuit Breaker

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SQUARE D LA26350AC   LA26350AC

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SQUARE D LA LA363001021 LA36300-1021 LA36300 3 POLE 300 AMP SHUNT BREAKER label

SQUARE D KOHLER BREAKER X-6305-145 600 AMP POWERPACT

SQUARE D KOHLER BREAKER GM85432-7 600 AMP LG600 POWERPACT

SQUARE D KIP36250   KIP36250

Square D KIL36225 3p 225a 600v Circuit Breaker 1-yr Warranty  

Square D KIL36225 -  

Square D KIL36200 Circuit Breaker - Reconditioned

SQUARE D KIL-36110   KIL36110

Square D KI36250 Circuit Breaker - Reconditioned

SQUARE D KI36225   KI36225

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SQUARE D KI36150   KI36150

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SQUARE D KHL3625025DC1422   KHL3625025DC1422

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SQUARE D KHL3612517DC1616   KHL3612517DC1616

SQUARE D KHL361251212 MOLDED CASE CIRCUIT BREAKER 125A 3P 250/600V   IN BOX

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SQUARE D KHL36000M1590   KHL36000M1590

SQUARE D KHL36000M1380   KHL36000M1380

Square D KHB36125 125A 3-Pole 600V Circuit Breaker *1 YEAR WARRANTY*

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SQUARE D KH-36150   KH36150

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SQUARE D KCP KCP34150 3 POLE 150 AMP 480 VOLT 65KAIC LOAD LUGS * *

Square D KCL34250 Circuit Breaker - Reconditioned

Square D KCL34225 Circuit Breaker -   Surplus

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SQUARE D KCL342008002   KCL342008002

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SQUARE D KCL-34150   KCL34150

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Square D KC34250G Circuit Breaker - Reconditioned

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Square D KC34250 Circuit Breaker - Reconditioned

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SQUARE D KC342251021   KC342251021

SQUARE D KC34225 CIRCUIT BREAKER 225 AMP 3-POLE 480V  

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Square D KC34200 -  -

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Square D KC34200 Circuit Breaker -   Surplus

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Square D KC34175 175A 3-Pole 480V Circuit Breaker

SQUARE D KC34150 CIRCUIT BREAKER 100KA@240 65K@480

Square D KC34150 Circuit Breaker -   Surplus

SQUARE D KC341251021   KC341251021

Square D KC34110 110A 3-Pole 480V Circuit Breaker *1 YEAR WARRANTY*

Square D KC34110 -  

SQUARE D KC-24225AC   KC24225AC

SQUARE D KC-24150AC   KC24150AC

SQUARE D KC-24125AC   KC24125AC

Square D KAL36250 Molded Case Circuit Breaker 250 amp 250a Schneider  

Square D KAL36250 Circuit Breaker -   Surplus

SQUARE D KAL-362251616   KAL362251616

Square D KAL36200 Circuit Breaker - NIB (  IN BOX)

SQUARE D KAL36175-6168   KAL361756168

SQUARE D KAL361751380   KAL361751380

Square D KAL36175 175A Thermal Magnetic Circuit Breaker

SQUARE D KAL36150G USNT

SQUARE D KAL361501212 MOLDED CIRCUIT BREAKER 150A 600V *  IN A BOX*

Square D KAL361501027 Circuit Breaker -   Surplus