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A compact metal box with one DB9 input and four DB9 outputs, plus a power socket

DTech

DTech 8541673255 4-Port RS232 Splitter Data Adapter

SKU CH-PJ40-P1NAF

A DB9 serial expander turns one COM port into four independent hardware ports for simultaneous device control or data capture, with a metal-shielded enclosure and an included 5 V power adapter

  • SpecificationsRS232 Splitter, DTECH 4 Port Serial Expansion Box 1x4 COM Po
  • Connector ADB9
  • Connector BDB9
  • Terminal GenderDB9
  • Connector StyleDB9
  • FeaturesRS232 Splitter, DTECH 4 Port Serial Expansion Box 1x4 COM Po
  • Adds four hardware COM ports for simultaneous multi-device control
  • Bi-directional design lets one master drive four slaves or four masters share one slave
  • Metal housing with ±8 kV ESD protection shields signals and extends operating life
  • Driver-free plug-and-play operation works instantly with PCs, Macs and industrial equipment
  • Includes 5 V 1 A power adapter for stable, delay-free data transmission

Four-Port RS232 Expansion Box

The DTech 8541673255 adds four real hardware serial ports to a single DB9 connection on a PC or laptop. It suits engineers, integrators and hobbyists who must monitor or control several RS232 devices such as modems, scales or GPS receivers from one computer.

RS232 Electrical Limits Apply

The splitter passes signals at whatever baud rate and protocol the attached RS232C equipment uses, with no internal conversion or buffering. Cable length, noise immunity and maximum speed remain bound by the RS232 standard itself, so very long runs or high-speed links may still require signal conditioning.

Driver-Free Plug and Play

A supplied DC 5 V 1 A adapter powers the metal-housed unit, which includes ±8 kV ESD protection on the DB9 pins. Straight-through cables give a 1-to-4 fan-out, while null-modem cables enable a 4-to-1 combiner; mixing cable types or leaving ports unpowered are the common causes of no data.

Highlights

  • Adds four hardware COM ports for simultaneous multi-device control
  • Bi-directional design lets one master drive four slaves or four masters share one slave
  • Metal housing with ±8 kV ESD protection shields signals and extends operating life
  • Driver-free plug-and-play operation works instantly with PCs, Macs and industrial equipment
  • Includes 5 V 1 A power adapter for stable, delay-free data transmission

Specifications

BrandG-TECH
Series8541673255
Model8541673255
Part Number8541673255
SpecificationsRS232 Splitter, DTECH 4 Port Serial Expansion Box 1x4 COM Port Expander with Power Adapter for Sharing PCs and Capture Data; 8541673255; Guangzhou DTECH Electronics Technology Co.,Ltd; DB9; 8.6 L x 3.2 W x 1.5 H inches; 200 grams; 1 amps; DB9 RS232 devices; Monitor
Connector ADB9
Connector BDB9
Terminal GenderDB9
Connector StyleDB9
FeaturesRS232 Splitter, DTECH 4 Port Serial Expansion Box 1x4 COM Port Expander with Power Adapter for Sharing PCs and Capture Data
Dimensions28 in. x 28 in. x 25 in.
Weight200 grams
Package Quantity1
Package ContentsRS232 Splitter, DTECH 4 Port Serial Expansion Box 1x4 COM Port Expander with Power Adapter for Sharing PCs and Capture Data x 1

Questions about this item

Which version of the 4-port RS232 splitter should I choose for a standard DB9 setup?

The 8541673255 model provides four DB9 female output ports and one DB9 male input port, all using the standard 2-TxD, 3-RxD, 5-GND pinout, so a single version covers typical straight-through and null-modem cabling.

What does the “no baud-rate limit” claim mean once the box is installed in a real machine?

The splitter passes whatever baud rate and protocol the connected RS232C devices negotiate; it adds no driver overhead or conversion latency, so throughput matches the slowest endpoint on the chain.

What interface standard does the splitter use and what does it cap in practice?

It uses the RS232C electrical standard on DB9 connectors; practical cable length and maximum speed are capped by the RS232C specification and the connected equipment, not by the splitter itself.

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