A 15-pin serial cable refers to a cable that uses a 15-pin connector—typically DB15—for data or signal transmission. While not as commonly used as DB9 or DB25 in RS-232 serial communications, DB15 connectors are still widely used in legacy control systems, game controllers, audio/video equipment, and industrial interfaces.
15 pin serial cable
In this guide, we’ll explain what a 15-pin serial cable is, its types, applications, and how to choose the right one for your needs.
What Is a 15-Pin Serial Cable?
A 15-pin serial cable typically uses a DB15 connector (D-subminiature 15-pin) and is used to transmit analog or digital signals between devices. The DB15 connector is arranged in two rows of pins (sometimes three), and should not be confused with the HD15 VGA connector, which is used for monitors.
Depending on the equipment and protocol, a DB15 cable may carry:
Serial communication signals (e.g., for CNC machines, PLCs)
Analog signals (e.g., joystick or game controller interfaces)
Custom industrial control signals
DB15 vs HD15: What's the Difference?
| Feature | DB15 Serial Connector | HD15 VGA Connector |
|---|---|---|
| Pin Layout | 2 rows of 7+8 pins | 3 rows of 5 pins |
| Common Use | Serial or control signals | Video output (monitors) |
| Also Known As | Game/MIDI port, joystick | VGA connector |
💡 Tip: Always check your device port shape and pin layout before purchasing, as DB15 and HD15 are not interchangeable.
Common Applications of 15-Pin Serial Cables
Legacy Game Ports – Older PC gamepads and joysticks used DB15 male connectors.
MIDI and Audio Equipment – Certain audio mixers and MIDI devices use DB15 serial cables.
CNC and Industrial Machines – Some automation systems use DB15 serial connectors for control signals.
RS-485/RS-422 Interfaces – Occasionally used with multi-pin DB15 connectors for serial networking.
KVM Switches or Control Boxes – DB15 connectors are used in switchboxes and control panels.
Types of 15-Pin Serial Cables
DB15 Male to DB15 Female: Common extension type.
DB15 Male to DB15 Male: For direct device-to-device communication.
Custom DB15 Breakout Cables: Split out each pin to terminal blocks or individual wires.
DB15 to Other Interfaces: Adapt DB15 to RJ45, BNC, or 9-pin serial as needed.
Pinout of a DB15 Serial Connector (Typical)
Pinout may vary by application, but here's a general idea:
| Pin | Typical Use (varies) |
|---|---|
| 1–15 | Control, TX/RX, GND, or vendor-defined signals |
You should always consult the user manual or technical specs of your equipment before wiring or using a DB15 cable.
How to Choose the Right 15-Pin Serial Cable
Connector Gender: Check whether your port is male or female.
Pin Configuration: Ensure compatibility with your equipment’s pinout.
Cable Shielding: Important for signal integrity in industrial environments.
Length: Available in standard sizes (e.g., 3ft, 6ft, 10ft) or custom lengths.
Application-Specific Needs: Some devices require molded connectors or panel-mount types.
Where to Buy High-Quality 15-Pin Serial Cables?
At TOT Wire & Cable, we provide:
DB15 serial cables with customizable wiring
Bulk OEM supply and industrial-grade materials
Connector options: straight or right-angle, molded or open-end
Fast lead time and competitive pricing
👉 Contact us for technical advice or to request a custom quote.
Conclusion
Although not as widespread as DB9 or USB in today’s market, 15-pin serial cables are essential in many legacy systems, industrial controls, and specialized applications. Understanding your equipment’s interface and the correct DB15 configuration can help ensure smooth communication and long-term reliability.
