Model MRI-5251RB provides both 135°F fixed and rate-of-rise thermal detection. These thermal detectors provide cost effective, intelligent property protection in a variety of applications
• Sleek, low profile design
• Smoke detectors are available with photoelectric or ionization technology
• Heat detectors are available as fixed temperature or fixed temperature with rate-of-rise detection
• Low profile base provides easy interchangeability
• Rotary address switches
• Superior EMI protection
Mounting Bases Features:
• SEMS screws provide easy wiring connection
• Multiple accessory options provide mounting flexibility
Intelligent Low Profile Detectors Specifications:
| Voltage Range | Thermal Ratings | |||||||||
| 15 – 32 volts DC peak | Fixed Temperature Setpoint: 135°F (57°C) Rate of Rise Detection: 15°F/min. (8.3°C/min.) High Temperature: 190°F (88°C) | |||||||||
| Standby Current | ||||||||||
| Ion/Thermal: 150 uA @ 24 VDC (without communication, LED off) 200uA@ 24 VDC (one communication every 5 sec. with LED enabled) |
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| Operating Temperature Range | ||||||||||
| Ion/Photo: 32°F to 120°F (0°C to 49°C) Photo with Thermal: 32°F to 100°F (0°C to 38°C) Thermal: -4°F to 100°F (-20°C to 38°C) High Temperature: -4°F to 150°F (-20°C to 66°C) Pinnacle: 32°F to 100°F (0°C to 38°C) |
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| Photo/Photo with Thermal: 250 uA @ 24 VDC (without communication, LED off) 300 230 μA @ 24VDC (without communication) 330 μA @ 24VDC (one communication every 5 sec. with LED enabled) |
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| UL Listed Velocity Range | ||||||||||
| Ion: 0 – 1200 fpm (0 – 6.1 m/sec) Photo/Photo with Thermal: 0 – 4000 fpm (0 – 20 m/sec) Pinnacle: 0 – 4000 fpm (0 – 20 m/sec) |
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| LED Current (max.) | ||||||||||
| 6.5 mA @ 24 VDC (on) | ||||||||||
| Insect Screen Hole Size | ||||||||||
| Height | ||||||||||
| Photo: 0.016 inch (0.41mm) nominal Ion: 0.035 inch (0.89mm) nominal | ||||||||||
| 2.0 inches (51 mm) 1.66 inches (42 mm) – Pinnacle |
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| Self Diagnostics (PinnacleTM) | ||||||||||
| 9 levels: 0.02, 0.03, 0.05, 0.10, 0.20, 0.50, 1.00, 1.50, 2.00%/ft. obscuration (0.06, 0.10, 0.16, 0.33, 0.66, 1.65, 3.24, 4.85, 6.41%/m obscuration) |
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| Shipping Weight | ||||||||||
| Heat: 4.8 oz. (137 g) Photo/Photo with Heat: 5.2 oz. (147 g) Ion: 5.4 oz. (154 g) Pinnacle: 5.6ox. (159 g) |
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Drift Compensation (Pinnacle B224RB/B224BI Electrical Ratings
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