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USB Interface Board for Laurel Electronics 1/8 DIN Instruments
The Laureate USB serial communication board allows a Laureate 1/8 DIN digital panel meter, counter or timer to be interfaced to a PC with an available USB port. Its primary use is as an alternative to the Laureate RS232 board for programming, since most new computers now feature multiple USB ports as opposed to RS232 ports. As for the RS232 board, connection to a PC allows programming via Laurel's free Windows-based Instrument Setup Software, or to output readings to a PC for display and datalogging. The USB board is shipped with a driver on a mini CD ROM.
A single USB meter is normally connected to a host computer via an off-the-shelf USB line with A and B connectors. The line can be up to 5.0 m (16.4 ft) long according to the USB standard. Laurel's driver will assign a COM port address to the connected device, which is then treated like an RS232 device.
Multiple USB meters can also be connected to the host computer by using powered hubs, which can branch the original USB line from the computer into multiple lines. Theoretical limits are up to four hubs in series for five tiers of lines, a maximum line length of 5 m per tier (up to 25 m total), and up to 127 devices including the hubs. Laurel's driver will assign a unique COM port address (out of an available 256 addresses) to each connected device, which is then addressed as a single device on a port.
Multiple meters can also be digitally addressed using alternative interface boards: Ethernet board, Ethernet-to-RS485 converter board, USB-to-RS485 converter board, RS485 board with dual RJ11 connectors, and RS485 Modbus board with dual RJ45 connectors. A USB board is recommended if the objective is to interface a single meter to a PC with an available USB port.
Three serial protocols are user-selectable: Modbus RTU, Modbus ASCII, and Laurel ASCII. The Laurel ASCII protocol is the simplest and is recommended if Laureates are the only devices on the network. For more information, please see our Modbus Protocol Serial Communications Manual and our Serial Communications Manual.
The Laureate USB 2.0 board provides a USB Type-B connector for plug-and-play connection to the USB port of a PC. It is ideal for use with a PC to program a Laureate meter using Instrument Setup Software. The required USB cable is readily available in computer stores and also from Laurel as P/N CBL05.
Laurel Software Requiring a Communications Board
Specifications Back to top
Protocol Specifications (implemented on meter main board)
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