FY-ENC-KSU Fast Ethernet RJ-45 to OptoLock® POF Optical Media Converter
- Technology
- Fibre optic cables, connectors and assemblies
- Partner
- Firecomms
The FY-ENC-KSU Fast Ethernet RJ-45 to OptoLock® POF media converter is a standalone Fast Ethernet converter that links traditional copper Ethernet ports to plastic optical fibre links. Designed for ease of use, it offers one 10/100Base-TX RJ-45 port and a connectorless OptoLock® POF interface, allowing you to extend network connectivity over duplex plastic optical fibre without the complexity of glass fibre installations.
This plug-and-play device requires no configuration or drivers – simply connect your Ethernet cable on one side and slide the bare POF cable into the OptoLock slot on the other. Powered via a standard 5 V USB supply (with both a USB cable and adapter provided), it’s convenient to deploy in offices, labs, or even on factory floors. Typical uses include home or office network extensions, connecting isolated or EMI-sensitive equipment in industrial and medical environments, and any application where electrical isolation or noise immunity is critical. The FY-ENC-KSU’s compact, robust design and included installation kit mean you can set up a secure 100 Mbps fibre link swiftly and confidently in almost any setting.

Range features
A high level overview of what this range offers
- RJ-45 to POF bridging – Seamlessly connects standard 10/100 Ethernet devices to a plastic optical fibre link, extending networks into new areas
- OptoLock connectorless design – Accepts bare 2.2 mm duplex POF cable directly, eliminating the need for fibre connectors and simplifying installation and maintenance
- 100 Mbps over 50 m – Delivers full Fast Ethernet speed over POF runs up to 50 metres, providing reliable short-distance links with the benefits of fibre
- Plug-and-play operation – No configuration or software needed; simply connect the cables and the converter automatically establishes the copper-to-fibre link for immediate network connectivity
- USB-powered convenience – Runs on 5 V DC via USB, so it can draw power from any USB port or the included mains adapter, removing the need for a dedicated power outlet
- Complete installation kit – Supplied with a USB power adapter & cable, a POF cutting tool, and an Ethernet patch lead for quick out-of-the-box setup without extra tools
- EMI immunity & isolation – The POF link is immune to electromagnetic interference and provides galvanic isolation between network segments, improving reliability in noisy electrical environments and protecting sensitive equipment
- Compact and robust – Small-footprint, durable enclosure that fits easily into office or equipment spaces and can be moved as needed for temporary or permanent installations
Downloads
for FY-ENC-KSU Fast Ethernet RJ-45 to OptoLock® POF Optical Media Converter
What’s in this range?
All the variants in the range and a comparison of what they offer
| Specification | Value |
|---|---|
Copper Ethernet | 10/100Base-TX (RJ-45 port) |
POF Ethernet | 100Base-FX over 2.2 mm OptoLock® POF interface |
Supported data rate | 100 Mbps Fast Ethernet (full duplex) |
Maximum POF length | 50 m (using standard 1 mm core step-index POF cable) |
Housing | Black enclosure (desktop module) |
Power input | 5 V DC via USB (adapter and cable included) |
Included accessories | 5 V USB power adapter, USB cable, POF cutter, RJ-45 patch cable |
FAQs
for FY-ENC-KSU Fast Ethernet RJ-45 to OptoLock® POF Optical Media Converter
This media converter uses a connectorless OptoLock® slot for the fibre. To attach the fibre, first trim the duplex POF cable flat using the provided cutter. Then simply insert each bare fibre end into the OptoLock port until it clicks into place. There’s no need for any special fibre connectors – the mechanism securely holds and aligns the bare plastic fibre for you.
It supports Fast Ethernet data rates of 100 Mbps (full duplex) over plastic optical fibre runs up to 50 metres in length (using standard 1 mm core step-index POF cable). This covers typical short-range network needs – for example, linking rooms in a home or office, or connecting equipment across a factory floor. Even at the full 50 m distance, you can expect a stable 100 Mbps connection, effectively equivalent in performance to a standard 100Base-FX fibre link but achieved with flexible plastic fibre.
In most scenarios, yes. To create a point-to-point Ethernet link over POF, you would use two identical converters – one at each end of a duplex plastic fibre cable – allowing two distant RJ-45 devices to communicate via the fibre. Alternatively, if you have another device that already includes a compatible POF optical port (for instance, a switch or router with a POF interface), you could use a single converter at the other end of the link. Generally, using a matched pair of converters is the simplest way to extend a copper Ethernet connection over plastic fibre.
It is designed specifically for plastic optical fibre. The OptoLock interface accommodates bare 2.2 mm POF cable and isn’t compatible with traditional glass-fibre connectors or cable types. You’ll need to use standard duplex plastic optical fibre for the link – you cannot directly use glass fibre (such as typical Ethernet SFP modules or SC/ST connectors) with this converter.
No. The FY-ENC-KSU converter is completely plug-and-play. It operates transparently as a media bridge, so you don’t need any drivers or special configuration. Just power it via USB, plug in your RJ-45 Ethernet cable and the POF fibre, and the device will automatically establish the link with no additional setup.
The converter comes as a complete kit for quick deployment. In the box, you’ll find the FY-ENC-KSU converter unit, a 5 V USB power adapter and USB cable for powering it, a duplex POF razor cutter for preparing the fibre ends, and an Ethernet patch cable. This means you have everything needed to set up a POF link immediately, without hunting for extra tools or components.
Using POF offers certain advantages that standard copper Ethernet can’t provide. First, a fibre link is immune to electromagnetic interference and provides galvanic isolation between devices – ideal in industrial or medical environments where electrical noise or ground potential differences can be problematic. POF is also safe and easy to handle: it’s lightweight, can be cut to exact length on site, and poses no electric shock or laser eye hazard (since it typically uses visible light LEDs). For runs up to 50 m, a POF link lets you achieve the benefits of fibre (immunity and isolation) with a minimum of cost and complexity, making it a great solution for extending networks into electrically noisy or sensitive areas.






