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RS422: USB to RS-422 serial adapter
The USB-COMi converter is housed in a strong plastic enclosure designed for use in rugged application areas . USB-COMi adds a Windows serial Com port via its USB connection and can be configured to work with RS-422 and RS485 peripherals such as POS and Industrial Control devices. USB Plug and Play allows easy serial port expansion and requires no IRQ, DMA, or I/O port resources.
USB-COMi features a full set of RS422 / 485 data and control signals ( TX-, TX+, RX+, RX-, GND, RTS-, RTS+, CTS+,
CTS- ) on its DB9 male connector. For details of the DB9 connector pin-out and RS422/RS485 configuration information please refer to our installation guides page. USB-COMi has an internal 128 byte transmit buffer FIFO and a 384 byte receive buffer FIFO. It supports data transfer rates of up to 230K bps. No external power supply is required as USB-COMi takes its power from the USB bus. USB-COMi comes complete with drivers for Microsoft Windows '98, Windows ME, Windows 2000 and Windows XP. Drivers are also available for Apple OS-8, OS-9 and OS-X as well as Linux. See our drivers page for details. 1.8M cable included.
Signal pinouts of the DB-9 Male
Pin 1 = TxD- (A)
Pin 2 = TxD+ (B)
Pin 3 = RxD+ (B)
Pin 4 = RxD- (A)
Pin 5 = GND
Pin 6 = RTS- (A)
Pin 7 = RTS+ (B)
Pin 8 = CTS+ (B)
Pin 9 = CTS- (A)
Unit is easily removed from the case for configuatrion settings. Requires two screws to be removed, and the board easily slides out of the case. Board measures 3" by 2.4" with the two rear corners trimmed to fit into the case.
|12-Feb-2004 Steve Murray steve at synergyfilms.co.nz
USB-COMi RS422 and the Sony Professional Video decks RS422 Protocol.
Hi Don, Got it to work!!!
Butchered a standard DB9F to DB9M and crossed the pins as follows:
DB9F(USB-COMi) > DB9M(Sony vtr)
Pin 1 > Pin 8
Pin 2 > Pin 3
Pin 3 > Pin 7
Pin 4 > Pin 2
Pin 5 > Pin 4 & 6
Shell GND > Pin 1 & Shell GND (not sure how important this is...)
Remaining pins disconnected.
This was based on the published pinouts of both the USB-COMi and the Sony RS422 Protocol. Both are easily available on the web.
Feel free to share this as you wish...however as this is very much 'bush electronics' I take no responsibility whatsoever for any unforseen circumstances or damage! Others make use of it at their own risk... Cheers, Steve..
13-Feb-2004 Elliot Duff wrote: I am interested in purchasing the USB-COMi Converter, however I need a speed of 500kbps. On your page you mention a speed of 230K - whilst on the EasySync page they mention speeds of 1Mbps.
From: Keith Dingwall keith.dingwall at ftdichip.com
The USB-Comi uses two MAX3086 level converter chips which are capable of up to 10 Mega bps, so it should be capable of 1 MBps.
User Manual Download:
DOWNLOAD USER MANUAL
Download Page 1 setup Manual
Download Page 2 setup Manual
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