Black Box Universal Async Fiber Optic Extender

Extend Serial Communications up to 8 Kilometers or More Through Noisy Areas

Low Price Guarantee

What's special about this fiber optic extender?

  • Ideal to use to extend your RS-232, RS-422, or RS-485 communications over a secure multimode fiber optic cabling, so you get great versatility of use and reduced errors in communications
  • Take advantage of the security offered by fiber as well as the inherent EMI/RFI resistance since light is immune to electrical interference
  • Ideal to use in point-to-point or in a multi-drop fiber ring configuration in which multiple serial devices communicate with one another
  • Click for More Features

The Black Box Universal Async Fiber Optic Extender allows you to extend serial communications up to 4 or more kilometers through noisy areas. This fiber optic extender gives you the flexibility to link RS-232, RS-422, or RS-485 async serial devices over multimode fiber optic cabling. You may use it point-to-point or in a multi-drop fiber ring configuration in which multiple serial devices communicate with another.


BB-ME610A-US Universal Async Fiber Optic Extender 4.3" H x 2.3" W x 1.0" D 0.10 lb

The Universal Async Fiber Optic will support full- or half-duplex communications over two fibers at distances up to 4 kilometers (2.5 miles)

  • Allows you to eliminate ground loops by using fiber and thus breaking the cooper connection between two areas with different ground potential. This way you eliminate the potential of damaging your equipment or corrupting your data
  • Supports full or half-duplex communications over two fibers at distances up to 4 km (2.5 miles) which increases equipment compatibility by being able to work with both types of equipment
  • Converts RS-232 to RS-422 / RS-485, allowing equipment that use different protocols to be able to communicate with each other. The RS-232 protocol is a point to point protocol with a limit of 50 feet, whereas the RS-422/RS-485 protocol is point to point or multipoint with a distance of 4000 feet
  • You can use this fiber optic extender with most multimode fiber
  • The LED emitter and photo detector operate in the 820 nm fiber wavelength
  • Set mode of operation for RS-422 or RS-485 with DIP switches, adding versatility since you will only need one unit to connect to these devices by only changing a few dip switches
  • Double Diamond Warranty


NOTE: If you want or need to extend a link farther, add the Fiber Optic Repeater (BB-ME611A-US). Used in the middle of a fiber link, it effectively doubles the transmission distance.


Fiber Cable Dual multimode optical cable
Fiber Optic Wavelength 820 nm
Maximum Fiber Ring Length 8 km (5 miles)
Operation Asynchronous, point-to-point, half- or full-duplex, or multipoint (fiber ring) half-duplex
Maximum Speed RS-232: 115.2 kbps
RS-422 / RS-485: 500 bps
CE Approval Yes
Interface RS-232, RS-485
Connectors Serial: (1) DB25 F
Fiber Optic: (1) pair of ST
Power 12V DC power supply (included)
Dimensions 4.3" H x 2.3" W x 1.0" D [10.9 x 5.8 x 2.5 cm]

No Manuals Available.



The Double Diamond Warranty is our no-questions-asked warranty that protects your BLACK BOX® brand products from accidental damage, including drops, water, and power surges. Most products come with a one- or two-year warranty. Some products, such as copper cables, manual switches, cabinets, and racks, are guaranteed for life! During the warranty period, Black Box will repair or replace your damaged equipment within one week of receipt at NO CHARGE!







Black Box Mini Fiber Optic ModemBlack Box Async Mini Fiber Optic Modem
Black Box Async Mini Fiber Optic Modem allows you to transmit your async RS-422 or V.11 data over multimode or single-mode fiber at up to 115.2 kbps full-duplex.

cleaning sticksCleaning Sticks / Combination Pack Cleaning Sticks
From per package
These sticks can be used to clean any connector on any configuration with ultra clean nibs to wick liquids and trap particulates. They feature a molded fibrous nib that is cleaner and more absorbent, and conform to end-face geometry, including APC.


indoor and outdoor fiber optic cables Black Box Indoor/Outdoor 12-Strand, 62.5-Micron Multimode Fiber Optic Cable
From / 1000 FT
The Black Box Indoor/Outdoor Multimode Fiber Optic Cable with 12-Strands and a 62.5-Micron is a tight buffered fiber cable that can be run both indoors and outdoors. Because it can be run anywhere, these cables are ideal for running communications between and within buildings as well as underground.

media converterBlack Box PoE PSE Media Converters
The Black Box PoE PSE Media Converter not only enables you to connect copper cables to long-distance fiber data links, but they also safely power compatible devices plugged in on the copper side. These media converters are fully compliant with the 802.3af Power over Ethernet (PoE) standard.

Black Box Fiber DriversBlack Box Fiber Drivers
The Black Box high performance fiber drivers are powered to ensure continuous, reliable transmission over fiber. These fiber drivers enable you to send RS-232 data across interference-free optical links, transmit data at up to 76.8 kbps, and reach distances of 2.5 miles at any speed.

Do you have any question about this product?
Let our experts and customers resolve all your doubts

Did you know that we can give you a quote for most of our products, including shipping?

You can also call us toll free 866.222.0030

What can make this page better?

We do everything we can think of to provide you with the product specs, images and ordering info you need, but if we're missing something or still have room to improve, please let us know. Your comments, suggestions and questions are the best tools we have for serving you better!