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Small black DB9 adapter with RS-232 to TTL conversion circuitry

GearMo

GearMo GM-1010-B RS-232 to TTL Converter 5V USB Converter

SKU CH-A854-X4E9J

Converts RS-232 signals to 5 V TTL levels at up to 115.2 Kbps without external power, operating from -40 to 85 °C

  • ColorBlack
  • Converts RS-232 signals to 5 V TTL levels without external power
  • Draws power directly from the RS-232 port for cable-free operation
  • Handles 300 to 115.2 Kbps for legacy and modern gear
  • Works across all operating systems with plug-and-play simplicity
  • Operates reliably from -40 to 85 °C in up to 95 % humidity

RS-232 to TTL 5V Converter

The GearMo GM-1010-B converts RS-232 TXD and RXD signals to 0-5V TTL or CMOS levels. It draws power directly from the RS-232, RS-485 or RS-422 port using charge-pump technology, so no external supply is needed. The adapter operates at baud rates from 300 to 115.2Kbps and works with existing communication software without driver installation.

Who It Suits and Who It Does Not

Engineers and hobbyists who need a compact DB9 adapter for legacy industrial, networking or embedded equipment will find it fits directly into current RS-232 full-duplex setups. Builders who require hardware flow-control lines such as RTS or DTR should look at a different model because this unit handles data direction automatically without handshake signals. Applications needing voltage levels other than 5V or galvanic isolation are also outside its design scope.

Key Specification: Port-Powered Operation

The converter harvests energy from the serial port itself, eliminating a separate power cable and the need to initialise the port before use. This makes it practical for tight enclosures, field-service kits or any installation where an extra supply would add cost or complexity. Operating temperature spans -40 to 85 and relative humidity tolerance reaches 95 percent.

Highlights

  • Converts RS-232 signals to 5 V TTL levels without external power
  • Draws power directly from the RS-232 port for cable-free operation
  • Handles 300 to 115.2 Kbps for legacy and modern gear
  • Works across all operating systems with plug-and-play simplicity
  • Operates reliably from -40 to 85 °C in up to 95 % humidity

Specifications

BrandGearmo
ModelGM-1010-B
ColorBlack

Questions about this item

Does the DB9 connector fit a standard RS-232 serial port?

Yes, the mini-sized DB9 connector plugs directly into a standard RS-232 TIA/EIA serial port for TTL conversion.

How is the GM-1010-B powered during installation?

It draws power from the RS-232 port itself using charge-pump technology, so no external supply or port initialization is required.

Will the converter need replacement if used continuously at high temperatures?

The operating range is -40 to 85 with 5% to 95% relative humidity; sustained use near the upper limit may reduce lifespan.

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