The MHR and MHW mini-horns are ideal for residential, hotel or
motel fire system applications, where a smaller notification device
is desired. The mini-horns come in versions that offer high and low
volume settings, temporal or non-temporal tones, synchronization
and silencing to meet the intent of the National Building Code
Section 3.2.4.18.9. The mini-horns can be mounted to single gang
back boxes for aesthetically sensitive applications. Synchronization
is provided on certain models when using the MDLA module. Minihorns
with silencing have an accelerated silence test feature which
allows testing of the silence operation without waiting for the entire
time-out period.
The MHR and MHW mini-horns can operate between 0 to 49C (32
to 120F) from a regulated DC or full-wave rectified, unfiltered power
supply. They are listed to Underwriter’s Laboratories of Canada
CAN/ULC S525.
• 12 and 24V operation
• High and low volume settings
• Temporal and non-temporal tones
• Mounts to single gang back box
• Low current draw
• Accelerated silence test feature on silencable models
• Mechanically and electrically compatible with PA400 series
Mini-Alert™ sounders
Specification
Physical Specifications
Dimensions
See Mechanical Drawing
Weight
2.67 oz.
Operating Temperature Range
0°C to 49°C (32°F to 120°F)
Mounting
Single-gang
Electrical Specifications
Input Terminals
12 to 18 AWG
Nominal Voltage
Regulated 12DC/FWR or regulated 24DC/FWR
Operating Voltage
8–33
Operating Voltage with MDLA
9–33
Sounder Frequency
3 KHZ(nominal)
Silence Time(MHRZA/MHWZA)
10 minutes max.
Silence ResetPower down Time
(MHRZA/MHWZA)
4 seconds