The Wisualarm DHI-HY-MRF50-R8 is a wireless interconnect module that fits into the base of a compatible Wisualarm mains-powered smoke or heat alarm, giving it the ability to join the 868MHz WisuLink wireless mesh alongside battery-powered wireless alarms. It's the bridge component for hybrid installations, where some detectors are hardwired together and others communicate wirelessly, without needing every alarm on the same physical interconnect line.
The module is powered directly from the host alarm head, so it needs no separate battery or power supply of its own, and links wirelessly with up to 24 other WisuLink-compatible devices. A flashing red LED indicates active RF transmission, giving a clear visual confirmation that the module is communicating with the rest of the network.
868MHz
RF Frequency
24
Max Interconnected Units
1000m
RF Range (Open Air)
11.9g
Weight
Powered
From Host Alarm Head
CE / UKCA
Certifications
Bridging Wired and Wireless Zones
Fitting this module to a mains-powered Wisualarm smoke or heat alarm — such as the HT5MA, HT5MB, SA5MA or SA5MB — lets that hardwired unit also communicate with battery-powered wireless alarms elsewhere in the property. This is particularly useful in retrofit projects where running new interconnect cable to every room isn't practical, but whole-property alarm coverage is still required.
Powered From the Host Alarm
Draws its power directly from the alarm head it's fitted into, requiring no separate battery or mains connection of its own.
868MHz WisuLink Wireless
Communicates over the same 868MHz WisuLink frequency used across the Wisualarm wireless range, ensuring full compatibility with other -R8 devices.
Up to 24 Interconnected Devices
Links wirelessly with up to 24 other WisuLink-compatible devices, extending a hardwired alarm's reach into a mixed wired/wireless network.
Long RF Range
Rated for a wireless range of up to 1000 metres in open, interference-free conditions, giving reliable coverage across most residential and small commercial properties.
Clear RF Status Indicator
A flashing red LED confirms active RF transmission, giving installers and occupants a simple visual check that the module is communicating correctly.
Compact, Low-Profile Fit
At just 53.5mm × 38.2mm × 11.7mm and 11.9g, the module fits discreetly into the compatible alarm's base without adding noticeable bulk.
Product Identity
Model number
DHI-HY-MRF50-R8 (also listed as HY-MRF60-R8)
Brand
Wisualarm (by Dahua)
Product type
Wireless interconnect module
Power
Power supply
Powered from host alarm head
Wireless
RF frequency
868MHz (-R8 variant) / 925MHz (-R9 variant)
RF range
Up to 1000 metres in open, interference-free area
Maximum interconnected units
Up to 24 WisuLink RF devices
RF visual indicator
Flashing red LED during RF transmission
Physical & Environmental
Dimensions
53.5mm × 38.2mm × 11.7mm
Weight
11.9 g
Colour / casing
White, PC+ABS
Operating temperature
-10°C to +55°C
Operating humidity
≤95% RH, non-condensing
Certification
Certifications
CE, UKCA, PSTI, RCM
What does this module do?
It's a wireless interconnect module that fits into the base of a compatible mains-powered Wisualarm smoke or heat alarm, giving that hardwired unit the ability to also communicate wirelessly with other WisuLink devices at 868MHz.
Which alarms is this module compatible with?
It's designed for mains-powered Wisualarm smoke and heat alarms with a compatible base, such as the HT5MA, HT5MB, SA5MA and SA5MB, allowing them to join a wireless network alongside battery-powered wireless alarms.
Does the module need its own power source?
No. The module is powered directly from the host alarm head once fitted, so it doesn't require a separate battery or mains connection.
How many devices can this module connect to?
It links wirelessly with up to 24 other WisuLink-compatible devices, matching the maximum interconnect capacity of the wider Wisualarm wireless range.
Is HY-MRF60-R8 a different product?
No — Dahua's own documentation and datasheets reference the DHI-HY-MRF50-R8 and HY-MRF60-R8 part numbers for the same physical wireless interconnect module, sharing identical specifications.
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
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