IC641SWM306cpu模块现货供应物美价优

IC641SWM306cpu模块现货供应物美价优
IC641SWM306cpu模块现货供应物美价优



一、工作环境
1． 温度
PLC要求环境温度在0~55℃，安装时不能放在发热量大的元件下面，四周通风散热的空间应足够大，基本单元和扩展单元之间要有30mm以上间隔；开关柜上、下部应有通风的百叶窗，防止太阳光直接照射；如果周围环境**过55℃，要安装电风扇强迫通风。
2． 湿度
为了保证PLC的绝缘性能，空气的相对湿度应小于85%（无凝露）。
3． 震动
应使PLC远离强烈的震动源，防止振动频率为10~55Hz的频繁或连续振动。当使用环境不可避免震动时，必须采取减震措施，如采用减震胶等。
4． 空气
避免有腐蚀和易燃的气体，例如氯化氢、硫化氢等。对于空气中有较多粉尘或腐蚀性气体的环境，可将PLC安装在封闭性较好的控制室或控制柜中，并安装空气净化装置。
5． 电源
PLC供电电源为50Hz、220（110%）V的交流电，对于电源线来的干扰，PLC本身具有足够的抵制能力。对于可靠性要求很高的场合或电源干扰特别严重的环境，可以安装一台带层的变比为1：1的隔离变压器，以减少设备与地之间的干扰。还可以在电源输入端串接LC滤波电路。
FX系列PLC有直流24V输出接线端，该接线端可为输入传感器（如光电开关或接近开关）提供直流24V电源。当输入端使用外接直流电源时，应选用直流稳压电源。因为普通的整流滤波电源，由于纹波的影响，容易使PLC接收到错误信息。
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