The Honeywell Morley-IAS MI-DISO loop isolation module (KTI07001001ISOL) is engineered for direct deployment across Morley-IAS intelligent analogue addressable fire alarm networks. Built on the standardized System Sensor 200 series mechanical and electrical platform, the module provides bidirectional short-circuit protection to preserve loop integrity across commercial, industrial, and institutional fire safety infrastructures.
Fire Alarm Control Panel Interoperability
The MI-DISO isolator module operates seamlessly on Morley-IAS intelligent analogue addressable fire alarm control panels, including the Morley-IAS ZX series and DXc series panels. When incorporated into the signaling line circuit (SLC), the module operates within an analogue loop voltage window of 15 to 30 V DC. It imposes a low quiescent load on the panel's loop driver circuits, drawing a maximum standby current of 200 µA at 24 V DC with a minimal switch-on resistance of 0.065 Ω maximum at 15 V DC. Between any two adjacent isolator modules, system designers can deploy up to 25 addressable loop devices or sensors without degrading loop communications or threshold detection.
Mechanical Mounting and Enclosure Hardware
Because the bare MI-DISO module is supplied as an unhoused unit measuring 93 mm (Height) x 94 mm (Width) x 23 mm (Depth) with a weight of 62 g, proper site installation requires dedicated mechanical mounting hardware from the 200 series accessory range:
- Surface Wall Mounting: Requires the M200E-SMB surface mount box (or M200E-SMB-KO knock-out variant). Installing the bare module (rated standalone at IP30) into the M200E-SMB enclosure upgrades the assembly to an IP50 ingress protection rating. The enclosure design allows viewing of the tri-colour status LED and address switches in two planes without detaching the cover.
- DIN Rail Mounting: Requires the M200E-DIN mounting clip adapter to secure the module directly onto standard 35 mm symmetric DIN rails inside auxiliary control enclosures and marshalling cabinets.
- Panel Mounting: Compatible with the M200E-PMB mounting bracket clip for custom equipment rack and enclosure chassis integration.
Field Wiring and Terminal Capacity
The unit features detachable plug-in screw terminal blocks designed for rapid wiring termination, loop testing, and servicing without disconnecting field cores individually. The terminal blocks accept solid or stranded conductors up to a maximum wire gauge capacity of 2.5 mm², maintaining continuous contact across field operating temperatures from -20 °C to +60 °C and non-condensing relative humidity levels from 0% to 95%.
Standards and Regulatory Compliance
The electrical and functional performance of the MI-DISO conforms strictly to regional and international fire safety life-safety standards:
- EN 54-17:2005: Certified for short-circuit isolators under Construction Products Regulation (CPR) certificate 0786-CPR-21643.
- Third-Party Approvals: Certified by VdS under approval certificate G202142 and certified by the Loss Prevention Certification Board (LPCB).
- European Specifications: Fully compliant with GEA GEI 1-082 and CEA GEI 1-084 technical specifications.
- Trade Harmonization: Categorized under HSN/Customs tariff classification code 85311020.
