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USB
to RS232/RS485 Converters
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USB-COMi (USB to
RS485)
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The
USB-COMi is
a USB to RS485 converter. It
allows easy serial port expansion without requiring IRQ, DMA, or I/O port
resources. The converter allows the user to easily and economically connect
RS485 devices to a host using USB. The RS485 communications standard is
used by DGH sensor based data acquisition modules and many industrial
control devices.
The
converter is based on a single chip USB UART for transferring serial data
over the Universal Serial Bus without the need for card-slots. The
converter has an internal 128 byte transmit buffer FIFO and a 384 byte
receive buffer FIFO. It supports baud rates of up to 230K. External power
is not required since USB-COMi takes its power from the bus.
Connection to USB is via a 3-foot detachable cable. Connection to
RS485 is thru the converters DB-9 male connector.
The converter is housed in a plastic enclosure designed for rugged
applications.
The
converter can interface all DGH ASCII protocol (not Modbus) RS485 modules to a host
using a USB connection. When using the USB-COMi with a DGH module or any
RS485 device that requires wiring, DGH recommends its’ CA-3 cable. The
CA-3 is a 3-foot serial cable with a female DB-9 connector and tinned
wires ready for connection to RS485.
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USB-COM
(USB to RS232)
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The USB-COM is a USB to
RS232 converter. It is designed to make serial port expansion quick, easy and simple. Connecting to a USB port on your computer or USB hub, the USB-COM instantly adds a
RS232 serial communication port to your system. By taking advantage of the USB bus, the converter makes it easier than ever to add serial ports and serial devices, like DGH data acquisition modules, to your system with easy plug-and-play and hot plug features.
The converter is automatically detected and installed upon connection to the USB port. There are no IRQ & COM port conflicts, since the port do not require any additional IRQ, DMA, memory as resources on the system. The converter is powered by the USB port-no external power required.
The converter can interface any DGH ASCII protocol (not
Modbus) RS232 module to a host using a USB connection. When using the
converter with a DGH module DGH recommends its’ CA-3 cable. The CA-3 is a 3-foot serial cable with a female DB-9 connector and tinned wires ready for connection to
RS485.
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Model |
Description |
Purchase |
| USB-COM |
USB-to-RS-232
Serial Communications Converter |
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| USB-COMi |
USB-to-RS-485
Serial Communications Converter |
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| Use
With: |
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| CA-3 |
RS-232
Serial Cable, 9 Pin-F to tin leads |
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