MTL 8939-HN Fiber Optic Extender IOTA
The MTL 8939-HN is a fiber optic extender IOTA (I/O Termination Assembly) designed for the Honeywell Series 8 I/O system. It extends the I/O Link communication distance between the S8 C300 controller and remote Series 8 I/O modules by converting electrical signals to optical signals transmitted over multimode fiber. This allows remote I/O cabinets to be placed up to 2 kilometers away from the controller, overcoming the distance limitations of traditional copper cables while providing complete immunity to electromagnetic interference.
Technical Specifications
Product Type: Fiber optic extender IOTA (I/O Termination Assembly)
System Compatibility: Honeywell Series 8 I/O system
Compatible Controller: S8 C300
Transmission Medium: Multimode fiber optic (62.5/125 µm or 50/125 µm)
Interface (Controller side): Combo cable interface for I/O Link
Interface (Remote I/O side): Fiber optic interface (multimode)
Maximum Transmission Distance: Up to 2 km (depending on fiber type)
Supported Protocol: I/O Link
Power Supply: Powered by Series 8 I/O system backplane
Operating Temperature: -20°C to +70°C
Mounting: Honeywell Series 8 I/O system compatible
EMI Immunity: Complete galvanic isolation via fiber optic transmission
Remote I/O Extension
The MTL 8939-HN enables the placement of remote I/O cabinets in locations far from the main controller, reducing cable runs and installation costs. By using fiber optic transmission, the extender provides complete galvanic isolation between the controller and remote I/O, eliminating ground loops and providing immunity to electromagnetic interference common in industrial environments. The extender is typically used in pairs, with one unit connected to the controller and another connected to the remote I/O chassis. The module supports both 62.5/125 µm and 50/125 µm multimode fiber, providing flexibility for different cabling infrastructures.
Application Domains
The MTL 8939-HN is used in large chemical plants and refineries for connecting remote I/O racks across process units, oil and gas pipelines for monitoring remote valve stations, power plants for distributed I/O in turbine halls and boiler houses, water treatment facilities for remote pumping stations, and mining operations for underground automation systems.
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