1756-CN2R ALLEN BRADLEY 设备连锁

ALLEN BRADLEY 1756-EN2TR/C
ALLEN BRADLEY 2711P-T12W22D9P
ALLEN BRADLEY 1756-CN2R
ALLEN BRADLEY 1756-CN2R
ALLEN BRADLEY 2711P-T12W22D9P
ALLEN-BRADLEY 1746-HSCE
ALLIED TELESIS AT-8000S/24POE
ALSTOM EP3-E-4-A
ALSTOM EP3-E-4-A
ALSTOM EP3-E-4-A
ALSTOM MMLG01
ALSTOM MVAX31S1DE0754A
ALSTOM DFI-110-340F
ALSTOM MMLB01

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Description

用PLC比用DCS,其成本要低一些(大约能省40%左右)。PLC没有专用操作站,它用的软件和硬件都是通用的,所以维护成本比DCS要低很多。一个PLC的控制器,可以接收几千个I/O点(最多可达8000多个I/O)。如果被控对象主要是设备连锁、回路很少,采用PLC较为合适。

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