The Secutron MRI-4020 is an intelligent multi-sensor detector combining photoelectric smoke and heat sensing in one unit. It serves Secutron MRI-4000 series addressable fire alarm panels. Specifically, the detector reports air obscuration and ambient temperature to the panel over a fully digital protocol. As a result, one device covers two detection methods at a single address.
Secutron MRI-4020 Detection Modes
The photoelectric chamber offers four sensitivity levels, from 2.0 to 3.5 %/ft. In addition, the heat element can report alarm at 135°F (57°C). Alternatively, configure 135°F with rate-of-rise operation per UL 268. Operating mode and levels are selected at the panel through its configuration tool. Furthermore, advanced software algorithms protect against nuisance alarms from dust, insects, or debris.
Each device takes one address from 1 to 240 on the SLC loop. First, set the address with the MIX-4090 hand-held programmer. Then mount the detector on its base. A panel-controlled remote output can drive an RA100Z remote LED. However, the remote indicator needs at least 18 V at the detector.
Specifications
- Normal operating voltage: 15 to 30 VDC
- Standby current: 160 µA (LED flashing)
- Maximum alarm current: 3.2 mA (LED on)
- Temperature range (no alarm): 32°F to 100°F (0°C to 37.8°C)
- Humidity: 10% to 93% non-condensing
- Dimensions: 4-1/4 in. diameter × 1-3/4 in. height
- Mounting: 4 in. square box, 2-1/8 in. deep, on an MRI-4001 or MRI-4002 base
- Wiring range: 22 to 12 AWG on all terminals
Compatibility and Options
This detector must be used with an MRI-4000 series compatible Secutron control panel. It also works with the full series of MRI-4000 input and control modules. Alternatively, the MRI-4020-ISO version adds a bi-directional short-circuit isolator against wiring faults. Each isolator-equipped device reduces allowable loop resistance by 0.22 ohms. Finally, Secutron lists UL, ULC, CSFM, and FM agency approvals for this detector line.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 0.2 lbs |
|---|---|
| Dimensions | 4.5 × 4.5 × 2 in |
| Condition | New |
| Manufacturers | Secutron |
| Part Type | Pull Station |
