Honeywell HM RHSE rate of rise thermal detector in ivory finish

Honeywell HM RHSE Rate of Rise Thermal Heat Detector

KTI00700100HME

Product Description

The Honeywell HM-RHSE is an intelligent analog addressable rate-of-rise thermal heat detector designed for reliable point fire detection in commercial and industrial fire alarm installations.

Make: Honeywell
Model: HM-RHSE
Detection Technology: Rate-of-rise (10°C/min) and fixed temperature (58°C threshold, EN 54-5 Class A1R)
Operating Voltage: 15 V DC to 32 V DC
Standby Current: 200 µA @ 24 V DC (no communication); 300 µA @ 24 V DC (LED blink enabled every 5 s)
Alarm LED Current: 3.5 mA @ 24 V DC
Remote Output: 22.5 V DC, 10.8 mA @ 24 V DC
Additional Base Loop Resistance: Typical 20 mΩ (max 30 mΩ) with B501AP base
Terminal Wire Gauge: Up to 2.5 mm²
Addressing: Decimal rotary decade address switches (01–99)
Status Indication: Dual integral red LEDs providing 360° visibility
Enclosure Material: PC/ABS plastic, Ivory finish
Operating Temperature Range: -30°C to +70°C (maximum continuous ambient 50°C)
Operating Humidity: 10% to 93% RH (non-condensing)
Mounting Compatibility: Honeywell B501AP plug-in base
Panel Compatibility: Honeywell Morley-IAS addressable fire alarm control panels
Standards: EN 54-5:2000 Class A1R, RoHS, WEEE

KTI00700100HME

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₹ 2,457.00 excl. GST

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Product Details
Available Brands	Honeywell
Unit	Numbers
HSN Code	85311020
Weight	0.12 kg
Dimension	L 10.2 x W 10.2 x H 6.1 cm cm ft in m
Warranty	12 Months No-Onsite Warranty
Tags/categories	Safety Fire Safety Solutions Smoke Detector

Usually dispatched within 8 days

About this product .

The Honeywell HM-RHSE thermal detector is engineered from durable PC/ABS thermoplastic in an ivory finish. Mounted into a standard B501AP plug-in base, the assembly maintains a low-profile aesthetic measuring 61 mm in height and 102 mm in diameter. Dual integral red light-emitting diodes are positioned diametrically opposite to provide 360-degree visual operational status indication across wide open spaces.
Equipped with an electronic thermistor and dedicated onboard microprocessor, the HM-RHSE continually tracks temperature dynamics. It issues a fire alarm response when the rate of ambient temperature increase exceeds 10°C per minute or when local ambient temperature crosses the fixed threshold of 58°C, conforming fully to EN 54-5 Class A1R criteria. This responsive dual-method sensing architecture ensures swift warning during fast-flaming thermal events.
The detector operates over an analog loop supply voltage ranging between 15 V DC and 32 V DC. Standby power consumption is tightly controlled at 200 µA at 24 V DC during quiescent periods, increasing to 300 µA when periodic loop polling LED flashes are enabled. In active alarm state, the LED indicators draw 3.5 mA, and the unit supports a dedicated 22.5 V DC remote annunciator output providing up to 10.8 mA.
Device addressing is established via two integrated decimal rotary decade switches, permitting quick and secure manual address assignment without the need for electronic programming tools. The sensor is engineered to integrate natively with Honeywell Morley-IAS addressable fire alarm control panels, communicating real-time analog heat level data for central supervisory analysis and threshold monitoring.
This rate-of-rise thermal detector is primarily utilized in environments where particulate-laden atmospheres, smoke, dust, steam, or exhaust fumes render optical smoke detectors susceptible to false alarms. Recommended application areas include boiler rooms, commercial kitchens, loading docks, multi-level parking garages, industrial process rooms, and manufacturing facilities.
Loop wiring terminates directly on the screw terminals of the B501AP mounting base, accepting conductor sizes up to 2.5 mm² and enabling cable termination prior to head installation. A built-in mechanical tamper-resistant locking tab protects the detector against unauthorized removal. Routine field maintenance is facilitated by an internal magnetic test switch that permits functional heat testing using an external test magnet.

Product Information .

Worship Places Industries, Factories Hospitals, Clinics Petrol Pumps Shopping Malls, Showrooms Government Buildings, Offices Banks Airports Railways, Bus Stations Construction, Builder Projects Pharma Industries Emergency Services

System Compatibility and Electrical Integration

The Honeywell HM-RHSE (KT Automation reference KTI00700100HME) is an intelligent addressable rate-of-rise thermal heat detector designed specifically for integration with compatible Honeywell Morley-IAS addressable fire alarm control panels (FACPs). The detector operates over proprietary analog addressable loop protocols, allowing continuous digital communication, device interrogation, and individual device polling between the panel and the detector electronics.

Fire Alarm Control Panel Interfacing

Proper functional operation requires connection to an intelligent fire panel running Honeywell Morley-IAS addressable loop communications. System addressing is established manually at the device head using integrated decimal rotary decade switches prior to insertion into the mounting base. System commissioning engineers must ensure device addresses match the system configuration and stay within the host panel’s allowable address parameters to prevent addressing conflicts or communication trouble faults.

Mounting Base and Mechanical Compatibility

The HM-RHSE is engineered to twist-lock directly into the standard Honeywell B501AP series plug-in base. Field wiring does not terminate onto the sensor head itself; instead, incoming and outgoing field cabling terminates onto the heavy-duty screw terminals integrated directly into the B501AP base. When seated into the B501AP base, the complete detector assembly measures 102 mm in diameter and 61 mm in overall height, with an installed weight of 88 g. The detector features a built-in mechanical tamper-resistant lock to prevent unauthorized removal from the B501AP base.

Loop Power and Electrical Compatibility

The HM-RHSE detector derives operating power directly from the signaling line circuit (SLC) loop:

Operating Voltage Range: 15 V DC to 32 V DC
Maximum Standby Current: 200 µA at 24 V DC (quiescent without communication)
Polled Standby Current: 300 µA at 24 V DC (with LED blink enabled once every 5 seconds)
Alarm Current: 3.5 mA at 24 V DC (dual integrated red LEDs continuously illuminated)
Series Loop Resistance: Introducing the detector into a B501AP base adds a typical contact resistance of 20 mΩ (maximum 30 mΩ) to the loop circuit

Remote Annunciation and Terminal Specifications

For installations requiring secondary external indication (such as above false ceilings or inside locked plant rooms), the detector provides an active auxiliary remote output circuit. The remote output delivers 22.5 V DC at a 24 V DC supply voltage and is rated to sink or drive up to 10.8 mA of remote output current. The mounting base terminals accept solid or stranded conductors up to a maximum wire gauge of 2.5 mm².

Environmental and Operational Limits

The detector is certified under EN 54-5:2000 Class A1R, providing rapid response when temperature rise rates reach 10°C per minute or when static ambient heat exceeds 58°C. While the detector circuitry is built to withstand operating temperatures from -30°C to +70°C in non-condensing environments between 10% and 93% relative humidity, it must not be installed in locations where continuous normal ambient conditions exceed 50°C, to ensure full operational compatibility without false alarms.

Compatibility Parameter	System Specification
Compatible Control Panels	Honeywell Morley-IAS Intelligent Addressable Panels
Mounting Base Standard	Honeywell B501AP Series Base
Loop Operating Voltage	15 V DC to 32 V DC
Current Draw (Standby / Alarm)	200 µA (unblinked) / 300 µA (blinked) / 3.5 mA (alarm)
Remote Indicator Output	22.5 V DC @ 10.8 mA (at 24 V DC supply)
Field Terminal Capacity	Up to 2.5 mm² wire cross-section
Loop Contact Resistance	Typically 20 mΩ (max 30 mΩ) with B501AP

Installation and Wiring Guidelines for Honeywell HM-RHSE

Base Mounting and Mechanical Installation

The Honeywell HM-RHSE intelligent rate-of-rise thermal detector is engineered for rapid field deployment using the standard Honeywell B501AP plug-in mounting base. Field installation utilizes a twist-to-lock mating mechanism that secures the detector head directly onto the pre-wired base. When fully seated in the B501AP base, the detector assembly features a diameter of 102 mm, an installed profile height of 61 mm, and a total combined net weight of 88 g (packed shipping weight is 0.12 kg). The exterior enclosure is manufactured from durable PC/ABS plastic finished in ivory.

To prevent unauthorized field detachment, vandalism, or accidental dislodgement in high-vibration industrial spaces, the assembly incorporates an integrated mechanical tamper-resistant locking tab. Once this locking feature is engaged during ceiling mounting, the detector head cannot be rotated or removed from the B501AP base without the intentional release of the tamper latch.

Loop Wiring and Electrical Termination

All analog addressable communication loop wiring terminates onto heavy-duty screw terminals located within the B501AP base prior to inserting the detector head. The terminal contacts accommodate field conductor sizes up to a maximum wire gauge of 2.5 mm². Utilizing the B501AP base introduces a minimal additional loop resistance of typically 20 mΩ (maximum 30 mΩ), which must be accounted for during fire alarm system loop resistance and voltage drop calculations.

The HM-RHSE operates across an addressable signaling line circuit (SLC) operating voltage range of 15 V DC to 32 V DC. At 24 V DC, maximum standby current consumption is 200 µA when loop communication is idle, and 300 µA when the panel initiates LED polling blinks once every 5 seconds. In an active alarm state, the LED current draw increases to 3.5 mA at 24 V DC. The device also provides dedicated auxiliary output terminals designed to drive an external remote LED indicator, supplying a remote output voltage of 22.5 V DC and a remote output current of 10.8 mA at 24 V DC.

Rotary Decade Address Configuration

Address assignment is achieved via dual decimal rotary decade address switches situated directly on the detector body. Before twisting the detector into the B501AP mounting base, commissioning engineers must manually set the unique loop address (01 to 99) using a standard screwdriver. This manual decimal addressing method avoids the need for specialized handheld programming tools or software-based soft addressing, eliminating field misconfigurations and allowing immediate verification of the device address on Honeywell Morley-IAS addressable fire alarm control panels.

Environmental Placement Criteria and Commissioning

The HM-RHSE is rated for operation across a wide thermal range of -30°C to +70°C and a non-condensing relative humidity envelope of 10% to 93%. However, because this model operates under Class A1R response parameters (triggering an alarm at a 10°C/minute rate of rise or upon reaching a fixed threshold of 58°C), it must never be installed in physical locations where the continuous normal ambient temperature exceeds 50°C. Installing the detector in spaces exceeding 50°C ambient heat will cause false alarm conditions or sensor degradation.

Post-installation verification is streamlined by two integral red LEDs that provide clear 360-degree visual indication of device status from any vantage point beneath the detector. Functional field testing during system handover can be performed using an external test magnet applied to the detector's built-in magnetic test switch, initiating an alarm condition and signaling the control panel without requiring artificial heat sources.

Installation Technical Reference

Parameter	Specification / Requirement
Mounting Base Compatibility	Honeywell B501AP Series Base
Installed Dimensions (H x D)	61 mm x 102 mm (including B501AP base)
Installed Weight	88 g (including base)
Maximum Wire Gauge	2.5 mm²
Loop Operating Voltage	15 V DC to 32 V DC
Additional Base Loop Resistance	Typically 20 mΩ (30 mΩ max)
Remote Output (at 24 V DC)	22.5 V DC @ 10.8 mA
Maximum Normal Ambient Limit	50°C (Do not exceed)
Addressing Method	Integrated Rotary Decade Switches

Maintenance, Functional Testing, and Inspection Guidelines

Routine Field Inspection and Visual Diagnostics

Periodic maintenance of the Honeywell HM-RHSE intelligent rate-of-rise thermal heat detector ensures long-term operational readiness across Morley-IAS addressable loop systems. Maintenance personnel must conduct regular visual checks of the ivory PC/ABS plastic enclosure to verify that heat entry paths around the thermistor assembly remain unobstructed by physical debris, grease, or heavy particulate accumulation. The compact physical profile (102 mm diameter and 61 mm height when fitted in the B501AP base) allows quick spatial evaluation in industrial plant rooms, parking garages, and manufacturing bays.

Visual diagnostics are facilitated by the dual integral red LEDs that provide 360-degree visibility from ground level. During normal quiescent operation, if panel-configured LED blinking is enabled, the LEDs will pulse once every 5 seconds, drawing 300 µA at 24 V DC (compared to 200 µA at 24 V DC when polling without visual blink). In a confirmed alarm state, the LEDs latch continuously illuminated, drawing 3.5 mA at 24 V DC. Failure of an LED to pulse during panel interrogation indicates a communication fault, base terminal contact resistance issue, or loop address conflict requiring diagnostic intervention.

Functional Testing Procedures

Commissioning and routine periodic service require functional testing to verify both microprocessor communication and physical thermal sensing performance under EN 54-5 Class A1R operating standards:

Magnetic Test Switch Verification: The HM-RHSE incorporates a built-in functional test switch designed to be activated using an external test magnet. Positioning the magnet against the designated exterior zone of the housing triggers the internal test circuitry, simulating a thermal event and initiating an alarm signal back to the fire alarm control panel to verify loop transmission.
Heat Response Testing: Field functional heating tests must be conducted using specialized, approved portable thermal testing equipment. Apply heat evenly to verify activation of both the 10°C per minute rate-of-rise response and the fixed static alarm limit of 58°C. Confirm that the Morley-IAS addressable panel registers the point alarm and activates the remote output (rated at 22.5 V DC and 10.8 mA at 24 V DC loop power) if wired to an external remote indicator.
Panel Reset: Following successful heat or magnet testing, initiate a system reset at the panel to clear the latched state and return the detector to its quiescent standby profile.

Base Removal, Terminal Servicing, and Address Verification

When dismounting the detector head from the Honeywell B501AP plug-in base for maintenance or cleaning, disengage the built-in mechanical tamper-resistant lock if it was activated during initial installation. Twist the detector counterclockwise to release it from the base terminals. Inspect the internal contacts of the base for corrosion or mechanical distortion that could increase loop resistance beyond the typical 20 mΩ (maximum 30 mΩ).

Check the decimal rotary decade switches located on the detector body. Confirm that the address switches match the commissioning schedule and panel point tables. Address configuration errors, unseated rotary dials, or duplicated loop addresses will trigger communication trouble faults at the control panel. Concurrently inspect field wiring terminals in the base to ensure that conductor terminations (supporting wire gauges up to 2.5 mm²) remain torqued and secure.

Environmental Operational Limits and Reference Values

Ensure that ambient conditions around installed detectors remain within manufacturer operational boundaries. The device operates across a broad temperature range of -30°C to +70°C; however, to prevent false alarms or sensor drift, the detector must never be operated in locations where the sustained normal ambient continuous temperature exceeds 50°C. Operating relative humidity must be maintained between 10% and 93% non-condensing.

Operational Maintenance Parameter	Specified Engineering Value
Loop Operating Voltage Range	15 V DC to 32 V DC
Standby Current (No Communication)	200 µA @ 24 V DC
Standby Current (LED Blink Every 5s)	300 µA @ 24 V DC
Alarm LED Current Draw	3.5 mA @ 24 V DC
Remote Output Electrical Ratings	22.5 V DC @ 10.8 mA (at 24 V DC loop)
Rate-of-Rise Alarm Response	10°C / minute (EN 54-5 Class A1R)
Static Alarm Threshold	58°C
Additional B501AP Base Resistance	Typ. 20 mΩ (Max. 30 mΩ)
Maximum Terminal Wire Gauge	2.5 mm²
Maximum Normal Ambient Continuous Temp.	50°C

Target Industrial and Commercial Applications for the Honeywell HM-RHSE

The Honeywell HM-RHSE (ERP code KTI00700100HME) is an intelligent addressable Class A1R rate-of-rise thermal fire detector designed for open-area protection across installations where airborne contaminants preclude the use of standard optical smoke sensors. Operating on a 15 V DC to 32 V DC loop protocol compatible with Honeywell Morley-IAS addressable fire alarm control panels, the unit utilizes dual-thermistor and microprocessor processing to trigger alarms either upon detecting a rapid temperature escalation exceeding 10°C per minute or when ambient temperatures reach the fixed static threshold of 58°C.

Mechanical Plant Rooms and Boiler Rooms

Plant spaces and boiler utility rooms consistently generate operational heat cycles, steam, and ambient airborne particulates that lead to nuisance tripping in traditional optical smoke detection devices. The HM-RHSE delivers targeted thermal monitoring without false activations from exhaust or boiler vapor. Because its certified operating range spans -30°C to +70°C (with a maximum recommended ambient installation threshold of 50°C), it functions reliably in unconditioned utility areas subject to wide temperature swings.

Commercial Kitchens and Food Processing Areas

Commercial cooking environments, baking lines, and food manufacturing facilities produce continuous steam, cooking vapors, and particulate matter that instantly contaminate optical chambers. Installing the HM-RHSE inside the B501AP twist-to-lock base provides dependable Class A1R heat detection. The dual integral red LEDs offer 360-degree visual annunciation from ceiling heights, while terminal connections supporting up to 2.5 mm² wiring allow seamless integration into commercial facility loops.

Parking Garages and Logistics Loading Bays

Enclosed automotive facilities, multi-deck parking structures, and distribution loading docks present severe challenges for smoke detectors due to heavy diesel fumes, vehicle exhaust emissions, and outdoor dust intrusion. The HM-RHSE tolerates harsh atmospheric environments with non-condensing relative humidity levels between 10% and 93%. It responds promptly to rapid-growth vehicle or cargo fires without registering false alarms from exhaust gases.

Manufacturing Plants and Dusty Industrial Warehouses

Facilities handling woodworking, dry batch chemical processing, textiles, or bulk dry goods storage routinely expose ceiling infrastructure to high dust concentrations. The sealed PC/ABS construction of the HM-RHSE prevents particulate accumulation inside sensing chambers. Furthermore, for partitioned storage sections or locked process rooms, the device supports an external remote indicator via its onboard 22.5 V DC, 10.8 mA remote output connection to provide status indication outside the immediate zone.

Application Suitability Matrix

Environment	Operational Challenge	HM-RHSE Functional Advantage
Boiler Rooms & HVAC Plants	Transient hot air blasts, trace moisture	Fixed 58°C threshold and Class A1R rate-of-rise sensing eliminate false optical trips.
Commercial Kitchens	Airborne cooking fats, steam, open heat	Thermistor sensing ignores optical particulates while identifying rapid heat spikes (>10°C/min).
Loading Docks & Garages	Combustion by-products and diesel exhaust	Exhaust fumes bypass heat-sensing thermistors; dual 360° LEDs ensure clear bay visibility.
Industrial Warehouses	Ambient dust load, wide temperature swings	Functions across -30°C to +70°C environments (up to 50°C continuous ambient).

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