Black Box MD940A-F
Async RS232 Extender Over Fiber – DB25 Female, ST Multimode
The Black Box MD940A-F Async RS232 Extender over Fiber offers a robust and secure method to extend serial communication distances beyond traditional copper limitations. Utilizing multimode fiber with ST connectors and a DB25 female interface, this Extender provides reliable, long-distance RS232 connectivity ideal for industrial automation, remote device management, and network infrastructure applications.
Features :
Designed for seamless integration into existing serial communication setups, the MD940A-F converts RS232 signals into fiber-optic transmissions, eliminating susceptibility to electromagnetic interference and ground loops. Its multimode fiber support allows for cost-effective, high-speed data transfer over considerable distances, making it suitable for factory floors, remote sites, or complex network environments requiring serial data extension.
Advanced Options :
Built for demanding environments, the MD940A-F ensures stable and noise-free data transmission over fiber optic links. Its galvanic isolation prevents electrical faults from affecting connected equipment, while the fiber interface maintains signal integrity over long distances. This Extender guarantees consistent performance for critical serial communication tasks in industrial and enterprise settings.
Product Key Features
- Extends RS232 serial signals over fiber optic cables
- Supports asynchronous communication at standard RS232 levels
- Uses ST multimode fiber connectors for high-speed, long-distance connectivity
- Equipped with a DB25 female connector for easy integration with serial devices
- Provides galvanic isolation to protect against electrical interference
- Compact and durable design suitable for industrial applications
Reliability & Performance :
Built for demanding environments, the MD940A-F ensures stable and noise-free data transmission over fiber optic links. Its galvanic isolation prevents electrical faults from affecting connected equipment, while the fiber interface maintains signal integrity over long distances. This Extender guarantees consistent performance for critical serial communication tasks in industrial and enterprise settings.
Key Features :
- Extends RS232 signals over multimode fiber optic cable
- Supports asynchronous communication standards
- DB25 female connector for serial device connection
- ST multimode fiber connectors for reliable, high-speed links
- Galvanic isolation for electrical noise immunity
- Compact, rugged design for industrial environments




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