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Perle 27083394 PSI-MOS-RS485W2/FO 850 E Transceiver/Media Converter - 1 ST Duplex Port - Multi-mode 850 nm Fiber - 4. 20 km Distance - Rail-mountable
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Product Features
Technical Overview
This media converter features one ST duplex optical port, providing a clear conversion path for RS-485 serial data. It supports standard multi-mode fiber cables with 50/125 µm or 62.5/125 µm core/cladding specifications, ensuring compatibility with common campus and building backbone cabling.
The device achieves a maximum supported distance of 4.20 km (2.61 miles) over fiber, significantly extending the reach of RS-485 networks beyond the typical limitations of twisted-pair copper. Its compact, rail-mountable chassis is designed for efficient installation in control cabinets, server racks, or industrial enclosures.
This section brings together practical product details such as Total Number of Ports, Network (RJ-45), DVI, Media Type Supported, so buyers can judge configuration, deployment fit, and day-to-day suitability with less guesswork.
Key Product Advantages
This converter delivers critical benefits for extending and protecting serial communication networks. By transitioning to fiber optic media, it eliminates ground loop issues, suppresses electromagnetic interference, and secures data integrity over extended runs.
Extended Distance & Isolation
Transmit RS-485 signals up to 4.20 km with complete electrical isolation between endpoints, protecting sensitive equipment from voltage surges and ground potential differences.
- 4.20 km maximum distance
- Electrical noise immunity
- Ground loop elimination
Industrial-Grade Design
The rail-mountable metal enclosure is built for reliability in demanding environments, supporting stable operation in temperature-controlled industrial settings.
- Rail-mountable form factor
- Durable metal construction
- Suitable for control cabinets
Deployment / Use Cases
The PSI-MOS-RS485W2/FO 850 E is ideal for modernizing or extending legacy serial networks where copper distance limits or environmental interference are concerns. It serves as a transparent bridge, allowing existing RS-485 devices to communicate over a fiber backbone.
Common applications include connecting PLCs, motor drives, or SCADA system components across separate buildings in an industrial campus. It is also deployed in transportation systems, water treatment facilities, and security networks where long-distance, noise-immune serial links are required.
Industrial Automation
Extend RS-485 networks between control rooms and remote field devices like sensors, actuators, or HMIs across a manufacturing plant or utility site.
Building Management Systems
Connect HVAC controllers, access control panels, or lighting systems over fiber to central monitoring stations, avoiding interference from electrical machinery.
Physical Profile
The converter features a compact, vertical design optimized for DIN rail mounting within standard industrial enclosures. Its small footprint (1.38" wide by 3.90" high by 4.13" deep) conserves valuable panel space. The unit includes integrated mounting clips for secure attachment to 35 mm DIN rails, facilitating organized, serviceable installations in control cabinets and patch panels.
- Width
- 1.38" (35 mm)
- Depth
- 4.13" (105 mm)
- Height
- 3.90" (99 mm)
- Weight
- 8.97 oz (254.30 g)
- Length
- 850 nm
What's in the Box
The package includes all necessary components for immediate deployment.
Highlights
- Converts RS-485 serial signals to optical fiber for extended distance communication.
- Features 1 ST duplex port for multi-mode fiber connectivity.
- Supports transmission distances up to 4.20 km (2.61 miles).
- Operates at 850 nm wavelength compatible with standard multi-mode fiber.
- Rail-mountable form factor for easy installation in industrial enclosures.
- Includes a 24VDC power adapter for immediate operation.
- Provides electrical isolation to protect connected equipment.
- Compliant with RoHS, REACH, and China RoHS environmental standards.
- Manufactured in Germany with a 1-year limited warranty.
- Compact dimensions: 1.38" W x 3.90" H x 4.13" D.
Specifications
| Specifications | |
|---|---|
| Manufacturer | Perle Systems, Inc |
| Manufacturer Part Number | 27083394 |
| Brand Name | Perle |
| Product Model | PSI-MOS-RS485W2/FO 850 E |
| Product Name | PSI-MOS-RS485W2/FO 850 E Transceiver/Media Converter |
| Packaged Quantity | 1 |
| Product Type | Transceiver/Media Converter |
| Interfaces/Ports | |
| Total Number of Ports | 2 |
| Network (RJ-45) | No |
| DVI | No |
| USB | No |
| Management Port | No |
| Number of ST Ports | 1 |
| ST Port Type | Duplex |
| Media & Performance | |
| Media Type Supported | Optical Fiber |
| Fiber Mode Supported | Multi-mode |
| Fiber Optic Cable Wavelength | 850 nm |
| Maximum Distance Supported | 4.20 km (2.61 Mile) |
| Fiber Optic Cable Core/Cladding Specification | 50/125 µm,62.5/125 µm |
| Power Description | |
| Power Source | Power Supply |
| Physical Characteristics | |
| Form Factor | Rail-mountable |
| Height | 3.90" (99 mm) |
| Width | 1.38" (35 mm) |
| Depth | 4.13" (105 mm) |
| Weight (Approximate) | 8.97 oz (254.30 g) |
| Miscellaneous | |
| Package Contents | PSI-MOS-RS485W2/FO 850 E Transceiver/Media Converter 24VDC USA Wall Power Adapter |
| Environmentally Friendly | Yes |
| Environmental Compliance | China Restriction of Hazardous Substances (China RoHS),Restriction of Hazardous Substances (RoHS),Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) |
| Country of Origin | Germany |
| Warranty | |
| Limited Warranty | 1 Year |
FAQ
What type of signal does this Perle converter support?
This converter is specifically designed for RS-485 serial communication signals. It converts the electrical RS-485 data stream from connected devices into an optical signal for transmission over fiber optic cable, and then converts it back to electrical RS-485 at the far end.
What is the maximum distance this media converter can support?
The Perle PSI-MOS-RS485W2/FO 850 E supports a maximum transmission distance of 4.20 kilometers, which is approximately 2.61 miles, when using compatible multi-mode fiber optic cable. This far exceeds the typical distance limits of standard copper RS-485 cabling.
What type of fiber optic cable is compatible with this unit?
This converter is compatible with standard multi-mode fiber optic cables. It supports cables with 50/125 micrometer or 62.5/125 micrometer core/cladding specifications. It uses an 850 nm wavelength and requires cables terminated with ST duplex connectors.
How is this media converter powered?
The converter is powered by an included 24VDC USA wall power adapter. The unit itself does not have an internal power supply or battery; it relies on this external adapter, which plugs into a standard North American electrical outlet.
What does 'rail-mountable' mean for installation?
Rail-mountable means the converter chassis is designed to be securely attached to a standard 35 mm DIN rail, which is commonly used inside industrial control cabinets, server racks, and electrical enclosures. This allows for neat, organized, and serviceable installations without requiring separate shelf space or drilling.
What is included in the package with this converter?
The package includes the PSI-MOS-RS485W2/FO 850 E Transceiver/Media Converter unit itself and a 24VDC USA Wall Power Adapter. These are the core components needed to install and operate the device immediately upon receipt.
| Qty | Price | Available |
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