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Small rectangular ABS module with DB9 and terminal block connectors, light grey finish

Vszerda

Vszerda DTECH DT-9000 RS232 to RS485 Data Converter

SKU CH-21J9-QYDFA

Passive RS232 to RS485 converter with 600W surge protection, 15KV ESD protection, and automatic half-duplex data flow control up to 115.2kbps over 1200m

  • Surge protection up to 600W per line and 15KV ESD
  • Extends RS-485 links to 1200m while RS-232 stays within 15m
  • Supports 300 to 115.2kbps data rates for flexible throughput
  • Powered from the RS-232 port so no external supply is needed
  • Compact ABS housing at 6.4 x 3.3 x 1.7mm fits tight spaces

Interface & Purpose

The Vszerda DTECH DT-9000 is a passive bidirectional module that bridges RS232 and RS485 serial standards. It enables equipment using one protocol to communicate with devices on the other without requiring an external power source. The converter is aimed at engineers and integrators linking legacy serial gear to longer-distance differential buses.

Fit & Limits

This unit suits installations where a single RS232 port must drive a two-wire half-duplex RS485 network up to 1200m at rates between 300 and 115.2kbps. It is not for systems that need full-duplex four-wire RS485 operation, multi-drop RS232 cabling, or transmission distances beyond the stated 15m on the RS232 side. Buyers requiring optical isolation or powered repeater functions should look elsewhere.

Sustained Behaviour

Built-in TVS diodes absorb 600W surge events per line and provide roughly 15KV electrostatic protection during continuous operation. The automatic I/O direction control and zero-delay transceiver switching maintain stable half-duplex flow without software overhead. Because the module draws power from the RS232 charge pump, sustained throughput depends on the host port maintaining adequate drive current over the full cable run.

Highlights

  • Surge protection up to 600W per line and 15KV ESD
  • Extends RS-485 links to 1200m while RS-232 stays within 15m
  • Supports 300 to 115.2kbps data rates for flexible throughput
  • Powered from the RS-232 port so no external supply is needed
  • Compact ABS housing at 6.4 x 3.3 x 1.7mm fits tight spaces

Specifications

No published specifications for this item yet.

Questions about this item

What RS-232 device must I already have to connect this converter?

You need a host with a standard RS-232C port such as a PC serial port or USB-to-RS-232 adapter to drive the converter's charge-pump power.

Will the 1200 m RS-485 range still work if I keep older 15 m RS-232 cables on the other side?

Yes, the RS-232 side stays within 15 m while the RS-485 side reaches up to 1200 m; the converter bridges the two segments transparently.

How can I verify the 300 to 115.2 kbps link is running without errors after wiring?

Send a test data stream from the RS-232 host and confirm the remote RS-485 device receives identical bytes at the chosen baud rate.

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