Pilz – 407704 – Standstill-Monitoring Relay (Standstill Monitor)

The Pilz 407704 is a standstill-monitoring relay designed to detect and signal when machinery or drive spindles come to a standstill. It operates at dual voltages (110 V or 230 V AC) and mounts conveniently on a DIN Top-hat rail, effectively monitoring process continuity and enabling safe transitions in automated systems.  

Key Technical Specifications:

• Function: Standstill (“Stillstand”) monitoring relay

• Supply Voltage: 110 V to 230 V AC  

• Mounting: DIN Top-hat rail  

• Application: Detects spindle or process standstill; prevents mode switching when process is still active (“Process in progress… switching the operating mode is not possible”)