Profile: ORR Protection Systems, Inc. is engaged in the designing, installation and servicing of fire & explosion protection systems. We are ISO 9001 certified. Our products include fire alarm control panels, smoke detectors, horn/strobe alarms, voice evacuation control units and remote annunciators. The NFS-640 fire alarm control panel is available as standard 80-character display, 640-character large display or display-less. It features 6.0 amp switch mode power supply with four class A/B built-in notification appliance circuits (NAC).