Using A Backup Capaciter In Case Of Interruptions In The Power Supply; Figure 24: Infeed For Profisafe I/O Modules 75X-66X With Backup - WAGO -I/O-SYSTEM 750 Manual
4fdi/4fdo 24v/2a profisafe v2 ipar, fail-safe 4/4 channel digital input/output, 24 vdc, 2 a, profisafe v2.0 ipar