NIB! System Sensor M500M Intelligent Monitor Module SIMPLEX 4090-9001 It is the Simplex 565-247

It is the Simplex 565-247 power supply interface board mounted on the Simplex 636-341 power supply

The System Sensor 1151 ionization detector uses state-of-the-art sensing chambers

— BH501BHT-2 Same as B501BH-2

plastic doors and mounting brackets

These sensors are designed to provide open area protection with 50-foot spacing capability as approved by UL 521

NIB! System Sensor M500M Intelligent Monitor Module SIMPLEX 4090-9001 It is the Simplex 565-247The System Sensor M500M Monitor Module provides an interface to contact devices, such as security contacts, waterflow switches, or pull stations. Rotary Switch Addressing Standby Current: 400 A max @ 24 VDC (one communication every 5 sec. with 47k EOL); 600 A max @ 24 VDC (one communication every 5 sec. with EOL<1k); 5. 5 latched on). Mounts in a standard 4 in 4 in 218 in junction box.