The Siemens 3RT1916-2FL11 is a SIRIUS auxiliary switch — a clip-on accessory for contactors and motor starters that adds a signal contact for status feedback, interlocking, or PLC input. It carries a 1 A rating at 24 V, dropping to 0.2 A at 125 V and 0.1 A at 250 V, so for a 24 VDC control circuit it handles the typical PLC input or relay coil draw without issue. The adjustable time range of 0.05 to 1 s lets you set an ON-delay for sequencing or staggered starts right on the device, no separate timer module needed.
Dimensions and mounting
At 45 mm wide, 38 mm high, and 75 mm deep, this switch clips onto the front of a SIRIUS contactor or overload relay — no DIN-rail space consumed beyond the base device. The IP20 terminal protection means it's safe for finger contact inside an enclosed panel, but not for washdown areas. Mounting position is any, which helps when the contactor is oriented sideways in a tight gland-plate layout.