Customized 28AWG DB26 Male to 24AWG 4xDB9 Female Extension Cable for Medical Equpment
1. Product Overview
The DB26 to 4xDB9 cable is a multi-port conversion cable used to assign a 26-pin D-sub (DB26) connector to four standard 9-pin D-sub (DB9) connectors. This cable is often used in application scenarios where a single multi-pin interface needs to be expanded to multiple standard serial interfaces.
2. Detailed specifications
Specification |
Parameter details |
Connector type (main end) |
DB26 male |
Connector type (sub-end) |
4xDB9 female |
Cable length |
Usually 0.5m-3m (customized) |
Wire gauge |
Usually 28AWG-22AWG |
Shielding type |
Full shield or multi-layer shielding |
Insulation material |
PVC or other high-quality insulation material |
Temperature range |
-20°C to 80°C |
Rated voltage |
Usually 30V AC/DC |
Current capacity |
1A-3A per line |
Impedance |
Customized according to application requirements |
3. Main advantages
- Interface expansion: Expand a single DB26 interface to 4 standard DB9 interfaces
- Space saving: Saves more space than using multiple independent converters
- Simplified wiring: Reduces cable clutter and simplifies device connections
- Cost-effectiveness: more cost-effective than purchasing multiple independent converters
- Reliability: integrated design reduces connection points and improves reliability
- Flexibility: supports multiple devices to be connected at the same time
4. Typical applications
- Industrial automation: connect PLC, HMI and other control devices
- Data communication: for legacy network equipment and serial communication systems
- Test and measurement: connect a variety of test instruments and monitoring equipment
- Medical equipment: connect medical monitoring and diagnostic equipment
- Audio and video system: control interface for professional audio and video equipment
5. Purchase suggestions
1. Confirm gender matching: clearly need DB26 male to 4DB9 female, or other combinations
2. Cable length: select the appropriate length according to actual installation requirements
3. Shielding requirements: high-quality shielded cables should be selected in electromagnetic interference environments
4. Wire gauge selection: thicker wire gauge is required for long-distance transmission or high-current applications
5. Connector quality: gold-plated contacts can improve reliability and corrosion resistance
6. Customization options: customized pin assignments may be required for special applications
6. Precautions for safe use
- Power-off operation: Make sure the device is powered off before connecting or disconnecting the cable
- Avoid overloading: Do not exceed the rated current and voltage of the cable
- Proper connection: Confirm the pin assignment is correct to avoid incorrect connection
- Environmental considerations: Avoid use in hot, humid or corrosive environments
- Regular inspection: Regularly check the cable for signs of wear or damage
- Bending radius: Avoid excessive bending and maintain a minimum bending radius
- Grounding requirements: Make sure the system is properly grounded, especially shielded cables
7. Frequently Asked Questions (FAQ)
Q1: Can this cable be used in both directions?
A1: Usually not, unless it is specifically designed for bidirectional use. Most DB26 to 4DB9 cables are unidirectional signal assignments.
Q2: What is the maximum supported data transfer rate?
A2: Depends on the cable quality and length.
Q3: Can different numbers of DB9 ports be customized?
A3: Yes, some manufacturers offer custom configurations such as DB26 to 2DB9 or 3DB9.
Q4: Does this cable support hot-swapping?
A4: Hot-swapping is not recommended unless the device explicitly supports this feature.
Q5: How to distinguish between male and female connectors?
A5: Male connectors have pins and female connectors have corresponding jacks. Both DB26 and DB9 have both male and female types.
Q6: Will a cable that is too long affect signal quality?
A6: Yes, especially for high-speed signals. Long cables may cause signal attenuation and increased interference.

1. PVC environmentally friendly high-flexible wire tensile shield: 10,000 swing tests, 72-hour aging tests, 4-30KG tensile tests have a longer service life and always maintain flexibility under the protection of a strong outer jacket.
2. Multiple shielding and high-speed transmission: thickened tinned copper core, plus aluminum foil metal shielding braided mesh, multiple shielding and anti-interference, serial communication data transmission in seconds.
3. Gold-plated contacts: anti-oxidation and anti-corrosion, internal gold-plated contact welding optimizes the transmission channel
Using thickened oxygen free copper wire core effectively reduces resistance and makes the circuit less prone to overheating. Simultaneously coated with a fireproof layer, it remains safe and durable even in high-temperature and dry environments. Bold thread body, sturdy and resistant to bending, will not break after long-term use.

