Black Box MD940A-F Async Rs232 Extender Over Fiber – Db25 Female, St Multimode

Part No:MD940A-F Write a Review

Condition:New

Brand:Black Box

Weight:1.4 lbs

Product Type:Multimode fiber

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

BrandBlack Box
Model NumberMD940A-F
SKUMD940A-F
ConditionNew
Dimensions3.7 × 2.7 × 1 in
Weight1.4 lbs
InterfaceRS232 asynchronous over fiber
Connector (Device Side)DB25 Female
Fiber InterfaceST multimode fiber connector
Transmission DistanceUp to several kilometers depending on fiber length
Fiber TypeMultimode fiber
Power SupplyExternal power adapter (if required)
Environmental RatingIndustrial-grade, suitable for harsh environments

Warranty

Products include the manufacturer warranty where applicable. Warranty coverage, term, and service options may vary by manufacturer and product condition.

Returns

We guarantee free replacements on all new/refurbished equipment in case of any defects.

  • Returns must be requested within 30 days of the original invoice date.
  • Merchandise must be unused and in original packaging; bulk-packed and refurbished items must have unbroken sealing tape.
  • A 25% restocking fee applies to non-defective merchandise returned by mistake.
  • Discontinued, close-out, and custom printed items are non-returnable unless defective.
  • Customer is responsible for return freight costs.

View full return policy

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