Tera Grand
Tera Grand - Premium USB 2.0 to RS232 Serial DB9 Adapter Cable 6 Feet - Supports Windows 11, 10, 8, 7, Vista, XP, 2000, 98, Linux and Mac - Built with FTDI Chipset and Thumbscrews
Bottom line: The Tera Grand - Premium USB 2.0 to RS232 Serial DB9 Adapter Cable 6 Feet ($15.99 on Amazon as of 2026-10-21 16:13 UTC): FTDI chipset with support for Linux 2.4.0+, OpenBSD 2.9+ and FreeBSD 4.7+; main trade-off: thumbscrew plug won't fit ports that need female hex jack nuts.
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*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
Pros & Cons
Pros
- ✓ FTDI chipset with support for Linux 2.4.0+, OpenBSD 2.9+ and FreeBSD 4.7+
- ✓ Covers Windows 98 through Windows 11, plus Mac OS 8 or higher
- ✓ Full RS-232 signal set: TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND
- ✓ Installs as a standard Windows COM port that legacy serial software can address
- ✓ 6 ft cable with thumbscrews that lock onto DB9 serial ports
Cons
- ✗ Thumbscrew plug won't fit ports that need female hex jack nuts
- ✗ Fixed 6 ft length; longer runs need a separate serial extension
- ✗ Latest driver must be downloaded from Tera Grand's website
- ✗ DB9 only; DB25 serial equipment needs an extra adapter
Manufacturer description
The Tera Grand USB 2.0 to RS232 serial adapter gives a modern computer a working DB9 COM port. You can use it to connect modems, ISDN terminal adapters, PDAs, bar code scanners, label printers and other gear that still talks over RS-232. It is built on an FTDI chipset, draws power from the USB port, and Windows installs it as a standard COM port. Legacy software that expects COM1-style hardware can usually find it without any extra setup. The adapter passes the full set of RS-232 signals: TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI and GND. That means modem control and hardware handshaking work…
SpecPicks Verdict
SpecPicks scored Tera Grand - Premium USB 2.0 to RS232 Serial DB9 Adapter Cable 6… using a rating × review-volume × price-fit model applied to published specs and reviews across the cables & connectors category. Tera Grand's cables & connectors lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for cables & connectors of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Will this Tera Grand serial adapter work on Windows 11?
Yes. Tera Grand lists support for Windows 11, 10, 8, 7, Vista, XP, 2000 and 98. The adapter installs as a standard Windows COM port. You can download the latest driver from the Tera Grand website.
Does it work with Linux or a Mac?
Yes. The listing covers Apple Mac OS 8 or higher, Linux 2.4.0 and later, OpenBSD 2.9 and later, and FreeBSD 4.7 and later. It uses an FTDI chipset.
Does it support hardware flow control and modem signals?
Yes. It carries the full RS-232 modem control and data signals: TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI and GND. That means RTS/CTS handshaking and modem status lines both work.
Can I use this cable to connect a VGA monitor?
No. It is for RS-232 serial devices with DB9 ports only. It will not work with monitors that use a 15-pin HDB15 VGA connector, even though the plugs look similar.
Will the connector fit my serial device?
It depends on your device's port. This cable has a DB9 connector with thumbscrews. Some devices need a cable with female hex jack nuts instead, and the two styles do not fit each other. Check your device's port before you buy. The cable is 6 feet long.
Key Features
- OS SUPPORT - Supports Windows 11, 10, 8, 7, Vista, 2000, XP, 98, Apple MAC OS8 or higher, Linux 2.4.0 and later, OpenBSD 2.9 and later & FreeBSD 4.7 and later. This cable is not intended for use with VGA monitors which use a HDB15 (15-pin) VGA connector.
- USB2 TO RS232 - Installed as a standard Windows COM ports, Full RS-232 modem control signals, RS-232 data signals; TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND
- CONNECT SERIAL DB9 DEVICES - Provides instant connectivity with modems, ISDN terminal adapter, PDA, bar code scanner, label printer, and devices with DB9 SERIAL ports. This cable is NOT used for VGA monitors which use a HDB15 (15-pin) VGA connector.
- FTDI CHIPSET - Built with FTDI chipset, Powered by USB port, Download the latest driver from the Tera Grand website. This cable is NOT used for VGA monitors which use a HDB15 (15-pin) VGA connector.
- IMPORTANT - This cable is NOT used for computer VGA monitors which use a HDB15 (15-pin) VGA connector. This cable is used for RS232 serial devices. Please double check if your RS232 Serial device needs a cable with Male Thumbscrews or Female Hex Jack Nuts. These connector styles are not interchangeable.
Full Specifications
| Brand | Tera Grand |
|---|---|
| Color | Black |
| Unit Count | 1 Count |
| Connectivity | USB |
| Model Number | USB2-RS232TS-06 |
| Compatibility | Mac, Linux |
| Input Voltage | 5 volts |
| Built-In Media | Tera Grand 6' Premium USB 2.0 to RS232 Serial DB9 Adapter Cable with Male Thumbs |
| Connector Type | DB9 Serial Connector |
| Item Dimensions | 5.5 x 1.5 x 9 inches |
| Mfr Part Number | USB2-RS232TS-06 |
| Number of Items | 1 |
| Number of Ports | 1 |
| Power Plug Type | No Plug |
| Compatible Devices | RS232 Serial Devices |
| Item dimensions L x W x H | 5.5 x 1.5 x 9 inches |
| Global Trade Identification Number | 06933194404757 |
Ready to buy?
Tera Grand - Premium USB 2.0 to RS232 Serial DB9 Adapter Cable 6 Feet - Supports Windows 11, 10, 8, 7, Vista, XP, 2000, 98, Linux and Mac - Built with FTDI Chipset and Thumbscrews is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
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