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Small rectangular adapter with female COM and RS485 ports, grey plastic casing

Vszerda

Vszerda RS232 to RS485 Adapter TXB027

SKU CH-HEYS-20D2P

Converts RS232 to RS485 using ZT323 and ZT485 chipsets, supports 300 to 115200 bps, port-powered or DC9V, operates from -10 to 55 °C

  • Industrial automation ready with RS232 and RS485 compatibility
  • Port-powered or optional DC9V input for flexible deployment
  • Surge protection built in for reliable data integrity
  • Compact 57 by 34 by 19 mm fits tight enclosures
  • Wide 300 to 115200 bps baud range supports legacy and modern gear

Industrial Serial Converter

The Vszerda TXB027 bridges a female RS232 COM port to an RS485 terminal using a ZT323 and ZT485 chipset. It supports baud rates from 300 bps up to 115200 bps and draws power from the port or an optional DC9V supply. The compact module measures 57 by 34 by 19 mm and operates from -10 to 55 °C. It targets integrators adding RS485 links to legacy serial equipment in automation, access control and point-of-sale systems.

Compatibility Checklist

Verify that the host device provides a standard RS232 female DB9 connector with the correct pinout for port-powered operation. Confirm the RS485 bus uses two-wire half-duplex wiring and that termination resistors are fitted at each end if required. Ensure the operating temperature range of -10 to 55 °C and 10 to 90 % non-condensing humidity suits the installation site. No driver installation is needed for the transparent conversion.

Upgrade Path

This adapter replaces a direct RS232 cable when the link distance exceeds the RS232 limit or when multi-drop networking is required. The jump is worthwhile when existing serial devices must join a 485 bus without redesigning the controller firmware. It does not suit applications needing isolated ports, three-wire full-duplex RS485 or baud rates above 115200 bps. Buyers who need optical isolation or wider temperature margins should look elsewhere.

Highlights

  • Industrial automation ready with RS232 and RS485 compatibility
  • Port-powered or optional DC9V input for flexible deployment
  • Surge protection built in for reliable data integrity
  • Compact 57 by 34 by 19 mm fits tight enclosures
  • Wide 300 to 115200 bps baud range supports legacy and modern gear

Specifications

No published specifications for this item yet.

Questions about this item

Does the TXB027 come with cables or a power supply, or must they be purchased separately?

The adapter includes the converter unit with a female COM port and an RS485 port; cables and an optional DC 9 V supply are not included and must be sourced separately.

Should I choose the port-powered mode or the DC 9 V input for a cabinet installation?

The TXB027 operates from the RS232 port power alone, but a DC 9 V input is available if the host port cannot supply enough current for the 0.15 W maximum draw.

What does the 115200 bps baud-rate limit mean for a 57 mm long converter in a 55 °C industrial cabinet?

The converter supports 300 to 115200 bps across its operating range of -10 to 55 °C, so the headline speed is maintained at the rated temperature extremes.

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