如果在-一个系统中有不只一个的基板，那么增加的这些基板中必须是不含有CPU的扩展或远程类型.一个可插入式CPU基板缺省为0号机架.所有的此类CPU都有日期时间显示串行通讯口与RS485是兼容的，并且使用GE Faune SNP协议(90系列协议)，90-30 .系列所有CPU串口都将SNP作为默认协议
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NAMCO EE530-58420 PROXIMITY SWITCH, NIB
NAMCO EE530-58420 PROXIMITY SWITCH, NNB
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SIEMENS NF351SS I-T-E ENCLOSED SWITCH W/ CONTACTS INDOO
