Model USB P/N LNET1 -High-Speed Ethernet Board

Ethernet operation complies with IEEE 802.3 and utilizes an industry-standard RJ45 jack for a 10/100 Base-T connection to a local area network (LAN) or directly to a PC or HMI. Multiple instruments, each with their own assigned IP address, can be individually addressed and polled. Data rates can be 10 or 100 Mbits/sec depending on the router. Using Ethernet and Modbus TCP, the LNET1 board can be polled every 2 msec.

A mini-USB connector is standard and can be used for meter programming or for data polling as a Modbus slave at 38400 baud in parallel with polling via Ethernet. To connect to the USB port of a PC, use our cable CBL07 or another readily available A-male to Mini-B USB cable.

Cached operation is a key feature of the LNET1 board. It allows the host meter to be polled at the maximum rate allowed by the meter`s main board, and in turn to be polled asynchronously at a much faster rate using external Ethernet or USB communications and Modbus RTU/TCP commands. These are document in our LNET1 & LNET1-485 user manual. Updated analog readings can be retrieved every 18 or 21 msec, depending on the meter`s 60 Hz or 50 Hz AC line noise rejection setting. Cashed counter readings can be retrieved every 10 msec.

Setup of WiFi, USB and RS485 communications uses our free Laurel Network Setup (LNS) utility. It automatically discovers the board`s Ethernet IP address assigned by the WiFi router, the COM port used for USB communications, the meter type, and the signal conditioner type. The USB or RS485 ports can also be used with our free Instrument Setup (IS) software to set up the host instrument and remote instruments on an attached RS485 bus.

• Fits all Laureate 1/8 DIN size instruments.
• Allows Laureate instruments to be polled using Modbus commands.
• Network speeds of 10 or 100 Mbits/sec.
• Can be polled via Ethernet every 2 msec.
• Includes Mini-USB port for programming or data transfer at 38400 baud.