Coupling Relay. 1-channel. Ident. no.: 7580622. The inputs are not polarized. Input E1 activates both outputs simultaneously. NE load connection: SIL 3 Safety Function for NE (Normally Energized) load (de-energized in safe state) is available. ND load connection: SIL 3 Safety Function for ND (Normally De-Energized) load (energized in safe state) is available. Complete galvanic isolation. Input reverse-polarity protected. Removable screw terminals. ATEX use in Zone 2. SIL 3