西门子S7 300 故障安全型PLC有SIL2认证吗? s7 300 故障安全型plc经过tuv sud认证的,好像还是sil 3认证 the s7-300 fail-safe signal modules have also been certified for use in safety mode to: ● sil3 (safety integrity level) according to iec 61508:2000 上面是手册上一段话,不过是针对io signal module。查看更多