Simplex 2190 9172 Wiring Diagram. Screw terminals for in/out wiring, 18 to 12 awg wire. Web simplex 2190 9163 wiring diagram. Simplex 21909172 Wiring Diagram from wiringall.com Screw terminals for in/out wiring, 18 to 12 awg wire. Fire alarm resources has free fire alarm pdf. This part is compatible with 4100, 4120, and 4020 series […]