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MRI-5251RB Low Profile Intelligent Thermal Sensor

Applications:
From the smallest business to the largest facility or campus, small conventional panels feature large capacity power supplies and easy front panel programming while large intelligent systems lead the market in sophisticated features including distributed emergency audio and are remarkably easy to configure and program. In addition to systems, Secutron™ also offers the most complete line of advanced detection industry with the advanced system features required by emerging fire codes and new protection design practices. Large intelligent networked systems support fully redundant network modularity, graphic display annunciation/monitoring, building management system integration, programmable smoke control and multi-channel emergency communications across buildings, campuses or communities. Secutron™ systems are also supported with the largest selection of detectors, signaling devices and accessory devices, including intelligent power supplies.
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  • Overview
  • Features
  • Specifications

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)
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)
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)
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)
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
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)
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)
Drift Compensation (Pinnacle  B224RB/B224BI Electrical  Ratings

Operating Voltage
15 to 32 VDC (powered by SLC)
Standby Current
170/450 µA max.
Set Time (B224RB only)
Short Delay: 60 to 100 msec
Long Delay: 6 to 10 sec
Reset Time (B224RB only)
20 msec max.
Relay Characteristics (B224RB only)
2 coil latching relay 1 Form C contact UL/ULC Rating:
0.5 A @ 125 VAC
0.9 A @ 125 VDC 3 A @ 30 VDC