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Light-grey cable with 3.5 mm TRS plug on one end and DB9 female socket on the other, 1.83 m long

Aurora Multimedia

Aurora Multimedia 3.5 mm TRS to DB9 Female Null-Modem Cable 1.83 m

SKU CH-MQW6-D487K

Connects a 3.5 mm TRS port to a DB9 female port with null-modem pin-out over 1.83 m

  • Connects 3.5 mm TRS devices to DB9 female ports
  • Null-modem wiring enables direct device-to-device communication
  • Pin 2 transmits and pin 3 receives for accurate data flow
  • 83 m length gives flexible equipment placement
  • Durable construction withstands regular use

Purpose and audience

This cable connects a device with a 3.5 mm TRS port to equipment using a DB9 female serial interface. It serves installers and technicians who need a null-modem link for data or control signals between mismatched connectors.

Build and daily use

The 1.83 m length gives enough slack for rack or desktop routing without excessive coils. A null-modem pinout routes DB9 pin 2 to transmit and pin 3 to receive, so connected ports communicate directly without a separate crossover adapter.

What the bundle changes

No additional adapters, drivers or software are included; the cable alone provides the physical link. Users must confirm that their host and peripheral expect this exact TRS-to-DB9 wiring before installation.

How it compares

Measured against everything we stock in S-Video & Mini-DIN Cables, at today’s prices. Recalculated every night.

Price $21.99
Cheaper than about 92% of the 1,035 comparable items (median $59.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What signals does the 3.5 mm TRS to DB9 female cable carry on pins 2 and 3?

Pin 2 on the DB9 end transmits data and pin 3 receives data, giving a null-modem crossover between the TRS plug and the DB9 socket.

What physical space is needed for the DB9 female connector?

The DB9 female end requires a standard D-sub 9-pin panel cut-out or mating male connector; the cable itself is 1.83 m long.

How do you connect the cable and which orientation mistake is common?

Plug the 3.5 mm TRS jack into the source device and the DB9 female onto a male DB9 port; the frequent error is reversing the transmit and receive lines by using a straight-through adapter instead of the null-modem wiring.

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