Simatic S7-1518 failsafe CPU with 10 MB of memory handles up to 128 drive axes, operates isochronously in 250 µs and has 1-ns bit performance. It has a Profinet interface with a two-port switch for communication with the field level, two Profinet interfaces and one Profibus interface. Programs are created with standardized Step 7 Safety Advanced V13 engineering tool, and the device is certified to EN 61508 (2010) for functional safety, and is suitable in safety-relevant applications up to SIL 3 per IEC 62061 and PL e per ISO 13849.
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