MRI-4021 SECUTRON

The Secutron MRI-4021 is an intelligent, non-isolated addressable photoelectric smoke and heat multi-sensor detector built for the Secutron 4000 series lineup. Operating over a 15–30 VDC range, it consumes a minimal 160 µA standby current and 3.2 mA in alarm.
It is compliant with UL 268 (7th Edition) and CAN/ULC S529 (Rev 4) standards, utilizing internal software algorithms to reject nuisance alarms caused by dust, insects, or construction debris. The thermal component features two installer-selectable configurations: a fixed 135°F (57°C) setting or a 135°F setting
with Rate-of-Rise (ROR) tracking. The detector features dual 360-degree visible status LEDs (Green for normal, Red for alarm, Amber for trouble) and is compatible with standard 4-inch (MRI-4002) and 6-inch (MRI-4001) mounting bases, as well as relay and sounder bases.