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- Connector Conversion: Converts a DB25 female (25-pin) interface to a DB9 male (9-pin) interface.
- Compact Form Factor: Miniature, low-profile design allows installation in tight spaces or directly on equipment ports without additional cabling.
- Passive Adapter: No active electronic components; maintains direct pin-to-pin continuity for signal integrity.
- Durable Construction: Metalized shell or nickel-plated housing provides mechanical strength and electromagnetic shielding.
- Universal Compatibility: Complies with standard D-Sub connector dimensions and pin assignments, ensuring compatibility with RS-232, RS-422, and RS-485 serial communication systems.
- Ease of Use: Plug-and-play design requires no configuration or external power.
- Corrosion Resistance: Gold-plated or tin-plated contacts (depending on manufacturer variant) ensure long-term conductivity and resistance to oxidation.
- Secure Connection: Precision-machined connectors with threaded jack screws for secure mating with corresponding D-Sub connectors.
- Signal Integrity: Maintains low contact resistance and minimal signal loss across the interface.
- Versatile Application: Suitable for computer serial ports, industrial controllers, instrumentation, and legacy communication equipment.
- Compact Form Factor: Miniature, low-profile design allows installation in tight spaces or directly on equipment ports without additional cabling.
- Passive Adapter: No active electronic components; maintains direct pin-to-pin continuity for signal integrity.
- Durable Construction: Metalized shell or nickel-plated housing provides mechanical strength and electromagnetic shielding.
- Universal Compatibility: Complies with standard D-Sub connector dimensions and pin assignments, ensuring compatibility with RS-232, RS-422, and RS-485 serial communication systems.
- Ease of Use: Plug-and-play design requires no configuration or external power.
- Corrosion Resistance: Gold-plated or tin-plated contacts (depending on manufacturer variant) ensure long-term conductivity and resistance to oxidation.
- Secure Connection: Precision-machined connectors with threaded jack screws for secure mating with corresponding D-Sub connectors.
- Signal Integrity: Maintains low contact resistance and minimal signal loss across the interface.
- Versatile Application: Suitable for computer serial ports, industrial controllers, instrumentation, and legacy communication equipment.
1. Product Overview
Product Name: Mini Gender Changer DB25F to DB9M
Model: MG25-9
Series: MG Series – D-Sub Mini Gender Changers
Article Number: MG25-9
Manufacturer: (Typically produced by multiple OEM and connectivity component manufacturers; compatible with standard D-Sub interface systems)
The MG25-9 Mini Gender Changer is a compact, precision-engineered D-Sub interface adapter designed to convert a DB25 female connector to a DB9 male connector. It serves as a passive, mechanical interface solution for adapting between two common D-Sub connector formats used in serial communication, data acquisition, and industrial control systems. The device is engineered for high reliability, signal integrity, and mechanical durability, making it suitable for both commercial and industrial applications where space-saving and robust connectivity are required.
2. Key Features
- Connector Conversion: Converts a DB25 female (25-pin) interface to a DB9 male (9-pin) interface.
- Compact Form Factor: Miniature, low-profile design allows installation in tight spaces or directly on equipment ports without additional cabling.
- Passive Adapter: No active electronic components; maintains direct pin-to-pin continuity for signal integrity.
- Durable Construction: Metalized shell or nickel-plated housing provides mechanical strength and electromagnetic shielding.
- Universal Compatibility: Complies with standard D-Sub connector dimensions and pin assignments, ensuring compatibility with RS-232, RS-422, and RS-485 serial communication systems.
- Ease of Use: Plug-and-play design requires no configuration or external power.
- Corrosion Resistance: Gold-plated or tin-plated contacts (depending on manufacturer variant) ensure long-term conductivity and resistance to oxidation.
- Secure Connection: Precision-machined connectors with threaded jack screws for secure mating with corresponding D-Sub connectors.
- Signal Integrity: Maintains low contact resistance and minimal signal loss across the interface.
- Versatile Application: Suitable for computer serial ports, industrial controllers, instrumentation, and legacy communication equipment.
3. Technical Specifications
- Connector Type 1: DB25 Female (D-Sub 25-pin socket)
- Connector Type 2: DB9 Male (D-Sub 9-pin plug)
- Pin Configuration: Straight-through, pin-to-pin mapping (1:1 continuity where applicable)
- Contact Material: Brass or phosphor bronze with gold or tin plating
- Shell Material: Steel or zinc alloy with nickel plating for EMI/RFI shielding
- Insulator Material: High-temperature thermoplastic (UL94V-0 rated)
- Dimensions (approximate):
- Length: 30–35 mm
- Width: 13–15 mm
- Height: 16–18 mm
- Weight: Approximately 15–25 g depending on housing material
- Operating Temperature Range: -25°C to +85°C
- Storage Temperature Range: -40°C to +85°C
- Dielectric Withstanding Voltage: ≥ 1000 V RMS at sea level
- Insulation Resistance: ≥ 5000 MΩ at 500 V DC
- Contact Resistance: ≤ 30 mΩ typical
- Mechanical Durability: ≥ 500 mating cycles
- Mounting Hardware: #4-40 UNC threaded jack screws (standard D-Sub hardware)
- Compliance: Conforms to IEC 60807-3 (D-Subminiature connectors standard)
4. Functionality
The MG25-9 Mini Gender Changer functions as a passive mechanical adapter that allows direct interconnection between devices or cables with mismatched D-Sub interfaces. Specifically, it enables a DB25 female connector (commonly found on older serial ports, parallel interfaces, or industrial controllers) to connect to a DB9 male connector (commonly used for RS-232 serial communication on PCs and embedded systems).
Use Cases and Applications:
- Serial Communication: Adapts legacy RS-232 DB25 interfaces to modern DB9 serial ports.
- Industrial Automation: Connects control modules, PLCs, and diagnostic tools with differing connector standards.
- Networking Equipment: Used in console connections, serial device servers, and communication gateways.
- Instrumentation: Facilitates data acquisition systems and test equipment requiring D-Sub interface adaptation.
- Computer Peripherals: Enables compatibility between older printers, modems, and serial devices.
- Embedded Systems: Provides a compact interface solution for development boards and embedded controllers.
Compatibility:
- Compatible with standard D-Sub connectors conforming to EIA/TIA-232, EIA/TIA-449, and MIL-C-24308 specifications.
- Works with both shielded and unshielded D-Sub cables.
- Can be used with serial adapters, extension cables, or directly on device ports.
5. Components & Accessories
Included Items:
- 1 × MG25-9 Mini Gender Changer (DB25F to DB9M)
Optional Accessories (depending on supplier):
- D-Sub dust covers or protective caps
- Panel-mount brackets or retention clips
- Extension cables (DB25M–DB25F or DB9M–DB9F)
- Screw-lock hardware kits (#4-40 UNC)
- EMI/RFI shielding accessories
Connectors and Interface Details:
- DB25F side: 25-pin female socket with recessed contacts
- DB9M side: 9-pin male plug with protruding pins
- Both connectors feature metal shells with integrated grounding tabs for EMI suppression.
6. Installation & Setup
Requirements:
- Compatible D-Sub connectors (DB25 male and DB9 female counterparts)
- Adequate clearance for connector housing and screw locks
- No external power or software configuration required
Mounting Options:
- Direct in-line connection between two D-Sub connectors
- Can be panel-mounted using standard D-Sub hardware if required
- Suitable for use in confined spaces due to its compact form
Configuration:
- Plug the DB25F side into the corresponding DB25 male connector.
- Plug the DB9M side into the corresponding DB9 female connector.
- Secure both sides using the integrated jack screws to ensure mechanical stability and electrical continuity.
- No driver or firmware setup is necessary; the adapter functions as a passive electrical bridge.
Installation Notes:
- Ensure correct orientation of connectors before mating to prevent pin damage.
- Avoid excessive torque on jack screws to maintain connector integrity.
- For high-vibration environments, use locking hardware or strain relief accessories.
7. Performance & Capabilities
Signal Transmission:
- Maintains full signal continuity across all connected pins.
- Supports standard RS-232 signal levels (±12 V typical).
- Suitable for low-frequency data transmission up to 115.2 kbps or higher depending on cable quality and system design.
Electrical Performance:
- Low insertion loss and minimal crosstalk due to short signal path.
- High insulation resistance ensures minimal leakage current.
- Stable contact resistance ensures consistent signal quality over repeated use.
Mechanical Performance:
- Rugged metal shell resists mechanical stress and provides EMI shielding.
- High mating cycle rating ensures long service life in repetitive connection/disconnection environments.
Limitations:
- Passive device; does not perform signal conversion (e.g., voltage level shifting or protocol translation).
- Pin mapping is direct; users must ensure correct pin assignments for their specific application.
- Not suitable for high-speed differential signaling beyond standard D-Sub serial communication rates.
Efficiency and Reliability:
- Zero power consumption.
- Maintenance-free operation.
- Reliable under standard environmental conditions for industrial and office use.
8. Standards & Compliance
- Connector Standard: IEC 60807-3 / MIL-C-24308 (D-Subminiature connectors)
- Electrical Interface: EIA/TIA-232, EIA/TIA-449 compliant (depending on system configuration)
- Flammability Rating: UL94V-0 for insulating materials
- RoHS Compliance: Meets Restriction of Hazardous Substances Directive (2011/65/EU)
- REACH Compliance: Conforms to EC Regulation No. 1907/2006
- Quality Assurance: Manufactured under ISO 9001 certified processes (typical for OEM suppliers)
- Environmental Compliance: Lead-free, halogen-free variants available depending on supplier specification
9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1–2 years) covering defects in materials and workmanship.
- Warranty terms may vary by distributor or OEM brand.
Support:
- Technical documentation available from most D-Sub component manufacturers.
- Pinout diagrams and mechanical drawings provided upon request.
- Customer support available through authorized distributors for compatibility and installation guidance.
Maintenance:
- No active maintenance required.
- Periodic inspection recommended for contact cleanliness and mechanical wear.
- Clean contacts with isopropyl alcohol and lint-free swabs if oxidation occurs.
Updates and Product Lifecycle:
- The MG25-9 is a standardized passive component with a stable design and long product lifecycle.
- Compatible with legacy and modern systems, ensuring continued availability and interoperability.
- Future revisions may include enhanced plating materials or improved shell designs for EMI performance.
Summary
The MG25-9 Mini Gender Changer (DB25F to DB9M) is a compact, robust, and reliable D-Sub adapter engineered for seamless interface conversion between 25-pin and 9-pin serial connectors. Its precision-machined contacts, durable metal housing, and compliance with international connector standards make it an essential accessory for technicians, engineers, and system integrators working with serial communication equipment. Designed for plug-and-play operation, it ensures mechanical stability, electrical continuity, and long-term reliability in both industrial and commercial environments.
This adapter provides a cost-effective, maintenance-free solution for adapting legacy hardware, extending the usability of existing equipment, and simplifying connectivity in mixed-interface systems.
Product Name: Mini Gender Changer DB25F to DB9M
Model: MG25-9
Series: MG Series – D-Sub Mini Gender Changers
Article Number: MG25-9
Manufacturer: (Typically produced by multiple OEM and connectivity component manufacturers; compatible with standard D-Sub interface systems)
The MG25-9 Mini Gender Changer is a compact, precision-engineered D-Sub interface adapter designed to convert a DB25 female connector to a DB9 male connector. It serves as a passive, mechanical interface solution for adapting between two common D-Sub connector formats used in serial communication, data acquisition, and industrial control systems. The device is engineered for high reliability, signal integrity, and mechanical durability, making it suitable for both commercial and industrial applications where space-saving and robust connectivity are required.
2. Key Features
- Connector Conversion: Converts a DB25 female (25-pin) interface to a DB9 male (9-pin) interface.
- Compact Form Factor: Miniature, low-profile design allows installation in tight spaces or directly on equipment ports without additional cabling.
- Passive Adapter: No active electronic components; maintains direct pin-to-pin continuity for signal integrity.
- Durable Construction: Metalized shell or nickel-plated housing provides mechanical strength and electromagnetic shielding.
- Universal Compatibility: Complies with standard D-Sub connector dimensions and pin assignments, ensuring compatibility with RS-232, RS-422, and RS-485 serial communication systems.
- Ease of Use: Plug-and-play design requires no configuration or external power.
- Corrosion Resistance: Gold-plated or tin-plated contacts (depending on manufacturer variant) ensure long-term conductivity and resistance to oxidation.
- Secure Connection: Precision-machined connectors with threaded jack screws for secure mating with corresponding D-Sub connectors.
- Signal Integrity: Maintains low contact resistance and minimal signal loss across the interface.
- Versatile Application: Suitable for computer serial ports, industrial controllers, instrumentation, and legacy communication equipment.
3. Technical Specifications
- Connector Type 1: DB25 Female (D-Sub 25-pin socket)
- Connector Type 2: DB9 Male (D-Sub 9-pin plug)
- Pin Configuration: Straight-through, pin-to-pin mapping (1:1 continuity where applicable)
- Contact Material: Brass or phosphor bronze with gold or tin plating
- Shell Material: Steel or zinc alloy with nickel plating for EMI/RFI shielding
- Insulator Material: High-temperature thermoplastic (UL94V-0 rated)
- Dimensions (approximate):
- Length: 30–35 mm
- Width: 13–15 mm
- Height: 16–18 mm
- Weight: Approximately 15–25 g depending on housing material
- Operating Temperature Range: -25°C to +85°C
- Storage Temperature Range: -40°C to +85°C
- Dielectric Withstanding Voltage: ≥ 1000 V RMS at sea level
- Insulation Resistance: ≥ 5000 MΩ at 500 V DC
- Contact Resistance: ≤ 30 mΩ typical
- Mechanical Durability: ≥ 500 mating cycles
- Mounting Hardware: #4-40 UNC threaded jack screws (standard D-Sub hardware)
- Compliance: Conforms to IEC 60807-3 (D-Subminiature connectors standard)
4. Functionality
The MG25-9 Mini Gender Changer functions as a passive mechanical adapter that allows direct interconnection between devices or cables with mismatched D-Sub interfaces. Specifically, it enables a DB25 female connector (commonly found on older serial ports, parallel interfaces, or industrial controllers) to connect to a DB9 male connector (commonly used for RS-232 serial communication on PCs and embedded systems).
Use Cases and Applications:
- Serial Communication: Adapts legacy RS-232 DB25 interfaces to modern DB9 serial ports.
- Industrial Automation: Connects control modules, PLCs, and diagnostic tools with differing connector standards.
- Networking Equipment: Used in console connections, serial device servers, and communication gateways.
- Instrumentation: Facilitates data acquisition systems and test equipment requiring D-Sub interface adaptation.
- Computer Peripherals: Enables compatibility between older printers, modems, and serial devices.
- Embedded Systems: Provides a compact interface solution for development boards and embedded controllers.
Compatibility:
- Compatible with standard D-Sub connectors conforming to EIA/TIA-232, EIA/TIA-449, and MIL-C-24308 specifications.
- Works with both shielded and unshielded D-Sub cables.
- Can be used with serial adapters, extension cables, or directly on device ports.
5. Components & Accessories
Included Items:
- 1 × MG25-9 Mini Gender Changer (DB25F to DB9M)
Optional Accessories (depending on supplier):
- D-Sub dust covers or protective caps
- Panel-mount brackets or retention clips
- Extension cables (DB25M–DB25F or DB9M–DB9F)
- Screw-lock hardware kits (#4-40 UNC)
- EMI/RFI shielding accessories
Connectors and Interface Details:
- DB25F side: 25-pin female socket with recessed contacts
- DB9M side: 9-pin male plug with protruding pins
- Both connectors feature metal shells with integrated grounding tabs for EMI suppression.
6. Installation & Setup
Requirements:
- Compatible D-Sub connectors (DB25 male and DB9 female counterparts)
- Adequate clearance for connector housing and screw locks
- No external power or software configuration required
Mounting Options:
- Direct in-line connection between two D-Sub connectors
- Can be panel-mounted using standard D-Sub hardware if required
- Suitable for use in confined spaces due to its compact form
Configuration:
- Plug the DB25F side into the corresponding DB25 male connector.
- Plug the DB9M side into the corresponding DB9 female connector.
- Secure both sides using the integrated jack screws to ensure mechanical stability and electrical continuity.
- No driver or firmware setup is necessary; the adapter functions as a passive electrical bridge.
Installation Notes:
- Ensure correct orientation of connectors before mating to prevent pin damage.
- Avoid excessive torque on jack screws to maintain connector integrity.
- For high-vibration environments, use locking hardware or strain relief accessories.
7. Performance & Capabilities
Signal Transmission:
- Maintains full signal continuity across all connected pins.
- Supports standard RS-232 signal levels (±12 V typical).
- Suitable for low-frequency data transmission up to 115.2 kbps or higher depending on cable quality and system design.
Electrical Performance:
- Low insertion loss and minimal crosstalk due to short signal path.
- High insulation resistance ensures minimal leakage current.
- Stable contact resistance ensures consistent signal quality over repeated use.
Mechanical Performance:
- Rugged metal shell resists mechanical stress and provides EMI shielding.
- High mating cycle rating ensures long service life in repetitive connection/disconnection environments.
Limitations:
- Passive device; does not perform signal conversion (e.g., voltage level shifting or protocol translation).
- Pin mapping is direct; users must ensure correct pin assignments for their specific application.
- Not suitable for high-speed differential signaling beyond standard D-Sub serial communication rates.
Efficiency and Reliability:
- Zero power consumption.
- Maintenance-free operation.
- Reliable under standard environmental conditions for industrial and office use.
8. Standards & Compliance
- Connector Standard: IEC 60807-3 / MIL-C-24308 (D-Subminiature connectors)
- Electrical Interface: EIA/TIA-232, EIA/TIA-449 compliant (depending on system configuration)
- Flammability Rating: UL94V-0 for insulating materials
- RoHS Compliance: Meets Restriction of Hazardous Substances Directive (2011/65/EU)
- REACH Compliance: Conforms to EC Regulation No. 1907/2006
- Quality Assurance: Manufactured under ISO 9001 certified processes (typical for OEM suppliers)
- Environmental Compliance: Lead-free, halogen-free variants available depending on supplier specification
9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1–2 years) covering defects in materials and workmanship.
- Warranty terms may vary by distributor or OEM brand.
Support:
- Technical documentation available from most D-Sub component manufacturers.
- Pinout diagrams and mechanical drawings provided upon request.
- Customer support available through authorized distributors for compatibility and installation guidance.
Maintenance:
- No active maintenance required.
- Periodic inspection recommended for contact cleanliness and mechanical wear.
- Clean contacts with isopropyl alcohol and lint-free swabs if oxidation occurs.
Updates and Product Lifecycle:
- The MG25-9 is a standardized passive component with a stable design and long product lifecycle.
- Compatible with legacy and modern systems, ensuring continued availability and interoperability.
- Future revisions may include enhanced plating materials or improved shell designs for EMI performance.
Summary
The MG25-9 Mini Gender Changer (DB25F to DB9M) is a compact, robust, and reliable D-Sub adapter engineered for seamless interface conversion between 25-pin and 9-pin serial connectors. Its precision-machined contacts, durable metal housing, and compliance with international connector standards make it an essential accessory for technicians, engineers, and system integrators working with serial communication equipment. Designed for plug-and-play operation, it ensures mechanical stability, electrical continuity, and long-term reliability in both industrial and commercial environments.
This adapter provides a cost-effective, maintenance-free solution for adapting legacy hardware, extending the usability of existing equipment, and simplifying connectivity in mixed-interface systems.
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