Description
HONEYWELL A/S
RS232-RS422
ISOI OPTISK ISOLATOR
REV 2.0
POWER SUPPLY: DC 12 – 30V, 20 mA
POWER – IS CONNECTED TO RS 232,0V
The Honeywell ISOI Optical Isolator is a serial communications interface converter designed to bridge RS232 and RS422 signal protocols with full galvanic optical isolation between circuits. Operating at Rev 2.0, this unit is engineered for use within gas detection systems aboard marine vessels, providing reliable, noise-immune serial data transmission between control panels, sensors, and monitoring equipment. In marine environments where electromagnetic interference, ground loops, and voltage differentials can compromise signal integrity, optical isolation is essential for maintaining accurate and uninterrupted communication across the detection network. This component plays a critical role in ensuring the operational reliability of onboard gas detection infrastructure.
Key Features
✓ Provides optical galvanic isolation between RS232 and RS422 serial communication lines, protecting connected equipment from ground loops and electrical interference.
✓ Operates on a DC power supply of 12–30V at 20 mA, with power connected to the RS232 side at 0V reference, as specified in the original product data.
✓ Compatible with Honeywell gas detection system architectures; exact panel and controller compatibility is subject to confirmation based on system model and revision.
✓ Suitable for installation in control rooms, instrument panels, and equipment enclosures typical of marine gas detection systems; mounting context and environmental ratings should be confirmed against vessel-specific documentation.
✓ As a Rev 2.0 component, it may serve as a direct replacement within existing Honeywell ISOI installations — compatibility with earlier or later revisions should be verified prior to fitting.
Marine Applications
✓ Gas detection and monitoring systems aboard LNG carriers, tankers, and vessels carrying flammable or toxic cargo where serial communication integrity is safety-critical.
✓ Engine room and machinery space gas detection networks requiring isolated serial data links between field sensors and central monitoring panels.
✓ Offshore support vessels and platform supply vessels fitted with Honeywell gas detection infrastructure requiring RS232-to-RS422 signal conversion.
✓ Retrofit and upgrade projects where legacy RS232 equipment must interface with RS422-based control or monitoring systems within an existing gas detection architecture.
✓ Naval and commercial vessel communication backbones where signal isolation is required to maintain data integrity across electrically noisy environments.
Why Marine Engineers Choose
The Honeywell ISOI Optical Isolator is a purpose-built interface component that addresses a common and critical challenge in marine serial communications — maintaining clean, isolated data links in electrically demanding environments. Its optical isolation design eliminates ground loop interference without compromising signal quality, making it a trusted choice for engineers maintaining gas detection systems to operational and safety standards.
Ideal For
LNG and chemical tankers, offshore supply and support vessels, bulk carriers, cruise ships, naval vessels, and any commercial or industrial marine application operating Honeywell gas detection systems with RS232 and RS422 serial communication requirements.
Technical Support & Compliance
Technical assistance is available for remote troubleshooting, onboard diagnostics, testing and commissioning, component replacement, and system integration support for Honeywell gas detection installations. Retrofit and upgrade guidance can be provided to assist with integrating this isolator into existing serial communication architectures, subject to confirmation of system compatibility. To confirm suitability for your application, buyers are encouraged to share nameplate photographs, the original part number or revision label, system model and software version, relevant wiring diagrams or drawings, and vessel name or IMO number where applicable. All compatibility assessments are subject to confirmation based on the information provided.
