Featuring cULus approvals, SAFESERIES SIL Relays include single and dual channel, 22 mm wide DIN-rail mounted modules suitable for switching safety related circuits up to SIL3 level as per IEC61508. Units accept 24 Vdc safety inputs and offer monitoring circuit option with wide-range input voltages from 24–230 Vac/Vdc. Single-channel models operate in de-energize-to-safe mode, while dual-channel model is designed for use in energize-to-safe or de-energize-to-safe mode.