System Sensor 2151T RAFA Optional dual action Lift and

Optional dual action Lift and Pull or Break Glass adapter offer added security against unwanted activation without complicating the overall pull station operation

— KI-SB Detector Mounting Base - Standard

The connections for the external power supply and the communication loop are isolated to prevent electrical interaction between them

with versions that include an AC transformer (such as the WT5500D)

System Sensor 2151T RAFA Optional dual action Lift andModel 2151 (photoelectric sensor) and model 2151T (photoelectric sensor with thermal) can be used with a variety of adapter bases in several wiring configurations and voltages. Other features include: low current draw, stable performance in high air velocities, built in tamper resistant base design, remote LED option, removable cover and built in test switch.