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.