《1391-DES45-DI》

发布时间:2017-07-06

1391-DES45-DI

1391-DES45-DI

1391-DES45-DI

(1)温度:PLC要求环境温度在055℃,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。

  (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1055 Hz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。

  (4)空气:避免有腐蚀和易燃的气体,例如化学的酸碱等。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。例如电厂的干排渣、干除灰等,在基建后期增加了封闭小屋。

  (5)电源:PLC对于电源线带来的干扰具有一定的抵制能力。在可靠性要求很高或电源干扰特别严重的环境中,可以安装一台带屏蔽层的隔离变压器,以减少设备与地之间的干扰。一般PLC都由直流24 V输出提供给输入端,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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