ABB AC500-S Safety User Manual page 122

Safety programmable logic controllers system

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AC500-S Safety Modules

DX581-S digital safety input/output module > Circuit examples

- With readback contact: Max reachable (ISO 13849, IEC 62061, EN 954) ➔ without error exclusion (you

can reach higher levels up to PL e, SIL 3, Cat. 4 with error exclusion) MTTFd = High; DC = High

- With readback contact: Max reachable SIL acc. IEC 61508 (Typ A components are required) ➔ without

error exclusion (you can reach higher level up to SIL 3 with error exclusion)

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