P0914BA

描述

（1）继电器输出：

优点是不同公共点之间可带不同的交、直流负载，且电压也可不同，带负载电流可达2A／点；但继电器输出方式不适用于高频动作的负载，这是由继电器的寿命决定的。其寿命随带负载电流的增加而减少，一般在几十万次至Jl百万次之间，有的公司产品可达1000万次以上，响应时间为10ms。

（2）晶闸管输出：

带负载能力为0.2A/点，只能带交流负载，可适应高频动作，响应时间为1ms。

（3）晶体管输出：

最大优点是适应于高频动作，响应时间短，一般为0.2ms左右，但它只能带DC5—30V的负载，最大输出负载电流为0．5A/点，但每4点不得大于0.8A。

当你的系统输出频率为每分钟6次以下时，应首选继电器输出，因其电路设计简单，抗干扰和带负载能力强。当频率为10次／min以下时，既可采用继电器输出方式；也可采用PLC输出驱动达林顿三极管（5—10A），再驱动负载，可大大减小。

2、抗干扰与外部互锁当PLC输出带感性负载，负载断电时会对PLC的输出造成浪涌电流的冲击，为此，对直流感性负载应在其旁边并接续流二极管，对交流感性负载应并接浪涌吸收电路，可有效保护PLC。当两个物理量的输出在PLC内部已进行软件互锁后，在PLC的外部也应进行互锁，以加强系统的可靠性。

3、“GOM“点的选择不同的PLC产品，其“COM”点的数量是不一样的，有的一个“COM”点带8个输出点，有的带4个输出点，也有带2个或1个输出点的。当负载的种类多，且电流大时，采用一个“COM”点带1—2个输出点的PLC产品；当负载数量多而种类少时，采用一个“COM”点带4—8个输出点的PLC产品。这样会对电路设计带来很多方便，每个“COM”点处加一熔丝，1—2个输出时加2A的熔丝，4—8点输出的加5—10A的熔丝，因PLC内部一般没有熔丝。

欧美品牌停产的，常用的“PLC”备品备件

我司产品应用于以下领域：

1,《发电厂DCS监控系统》

2,《智能平钢化炉系统制造》

3,《PLC可编程输送控制系统》

4,《DCS集散控制系统》
​
5,《智能型消防供水控制系统》

6,《化工厂药液恒流量计算机控制系统》

7,《电气控制系统》造纸,印染生产线,变电站综合自动化控制系列

本特利，英维思，伍德沃德，福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐，ACSO，力士乐等各大品牌的DCS系统配件，机器人系统配件，大型伺服系统备件。

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Advanced B12

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