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The Black Box MD940A-M fiber driver provides a robust solution for extending Async RS232 serial communication well beyond the typical 50-foot limit. Capable of transmitting data over multimode fiber distances up to 2.5 miles (4 kilometers) at speeds up to 76.8 kbps, it offers unmatched flexibility and performance for industrial, security, and remote monitoring applications. Its intelligent features, including auto-sensing power supply and switchable DTE/DCE modes, ensure maximum interoperability and ease of use in diverse environments.
Designed to overcome the restrictions of traditional RS232 cabling, the MD940A-M utilizes multimode fiber optics to deliver high-quality, long-distance serial data transmission. Its support for bidirectional asynchronous communication makes it ideal for connecting computers, peripherals, or remote devices across vast distances without degradation or interference.
The system features a versatile range select functionality that compensates for coupled power variations, maintaining stable and consistent data flow even under varying environmental conditions. The autosensing power supply automatically adjusts to local voltage standards, simplifying installation and ensuring continuous operation.
Built for demanding environments, the Black Box MD940A-M offers high reliability with its autosensing power supply and advanced power compensation features. Its fiber optic link guarantees immunity from electrical noise, radio frequency interference, and ground loops, ensuring data integrity over long distances. The switchable DTE/DCE functionality enhances compatibility with various systems, making it a versatile and dependable solution for critical data transmission needs.
| Specification | Details |
|---|---|
| Model Number | MD940A-M |
| Interface | RS-232 asynchronous, DTE/DCE configurable |
| Fiber Type | Multimode fiber (ST connector) |
| Max Distance | Up to 2.5 miles / 4 km |
| Data Rate | Up to 76.8 kbps |
| Power Supply | Autosensing 110–220V AC |
| Transmission Mode | Bidirectional asynchronous |
| Power Compensation | Range select feature to handle power variations |
| Environmental Rating | Rugged, industrial-grade |

All packages are shipped same day if the order is placed before 3PM CST
We use UPS/FedEx to ship the packages with different service levels offered by UPS/FedEx
Overnight Shipping take 1 business day
Expedited Shipping take about 2-3 business days
Ground shipping take about 3-5 business days
You can select the desired service level at Checkout and we will make sure the package is shipped as per the selected service level.
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iv) Check
v) Bank Transfer/ACH/Wire Transfer
To process the order through Paypal/CC, you can simply checkout and process the payment.
If you want to issue us Purchase Order/Check/Bank Transfer, Please contact us at the following details
Call: 469.458.9636
Email: sales@dcsupplies.net
If you have any queries, please contact us at the following details and we will be happy to help
Call
469.458.9636
469.458.9638
Email
sales@dcsupplies.net
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BLACK BOX MD940A-M ST to DB25 Male Fiber Driver
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