D-Sub 9p F/F Connector Tecline 50403

The Tecline D-Sub 9p F/F Connector Tecline 50403 is a double female D-Sub adapter designed to join two 9-pin D-Sub (DB9) cables without altering signal wiring. The unit combines a blue plastic shell with stainless steel fastening elements to provide a compact, durable joiner suitable for serial data and control signal connections. Its two female D-Sub 9-pin ports enable straightforward extension or coupling of male-ended cable assemblies for RS-232, RS-485 and similar low-voltage communication lines where a standard DB9 interface is used.

Advantages

The connector's metal fastening hardware ensures secure mechanical contact and reliable alignment between connected cables while the molded blue housing resists everyday impacts and abrasion. Its passive, gender-changing adapter design requires no power or configuration, preserving pin mapping and signal integrity when linking two male DB9 connectors. The compact form factor minimizes added bulk inline and enables placement in tight installations.

Suitable for

• Extending or joining serial RS-232/RS-485/TTL DB9 cable runs
• Temporary field connections and quick equipment swaps
• Industrial control panels and test bench cabling
• Legacy computer and instrumentation interfaces

Key specifications

• Connector type: Female-to-female D-Sub 9-pin (DB9) adapter
• Number of ports: 2 female DB9 ports
• Housing material: blue molded plastic
• Fastening: stainless steel screws and thumbscrews for secure mating
• Function: passive passive gender adapter, preserves pin mapping
• Typical applications: serial data and control signal coupling

How to use

To use the Tecline D-Sub 9p F/F Connector, align the male DB9 plug on each cable with the female ports, then engage the fastening screws to secure the connection. Ensure the pins align correctly and avoid forcing connectors together to prevent bent pins. The adapter is intended for low-voltage signal connections; do not use it where power-carrying or high-voltage circuits are present without appropriate isolation. Remove the adapter by loosening the thumbscrews and gently separating the cable ends.

Usage recommendations

Use the adapter in dry, clean environments and inspect connectors periodically for bent pins or corrosion. For long-term or vibration-prone installations, verify screw tightness and consider strain relief on cable entries to reduce mechanical stress on the adapter and connected equipment.