Laurel-electronics Laureate Digital Panel Meter for Load Cell & M Manual de usuario descargar pdf (Pagina 3)

LAUREL

ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 3

Serial Data I/O (optional)

Board selections

Protocols

Data rates

Digital addresses

Isolation

Ethernet, Ethernet-to-RS485 server, USB, USB-to-RS485 server, RS485

(dual RJ11), RS485 Modbus (dual RJ45), RS232.

Modbus RTU, Modbus ASCII, Laurel ASCII protocol

300 to 19200 baud

247 (Modbus), 31 (Laurel ASCII),

250V rms working, 2.3 kV rms per 1 min test

Signal Connections

Environmental

Operating temperature

Storage temperature

Relative humidity

Protection

0°C to 60°C

-40°C to 85°C

95% at 40°C, non-condensing

NEMA-4X (IP-65) when panel mounted

Load Cell Meter Connections

In 4-wire connection, the excitation and sense lines

are tied together. The meter can make ratiometric

corrections for supply voltage variations, but not

compensate for variations in lead resistance. This

connection is often used with short cable runs.

In 6-wire connection, the sense lines are separate

from the excitation lines, thereby eliminating effects

due to variations in lead resistance. This allows long

cable runs in outdoor environments with temperature

extremes.

For large scales, up to four 350 ohm load cells can

be powered by a single Laureate, whose excitation

output is rated 120 mA at 10 V. The excitation and

sense points of the four bridges are connected in

parallel through a summing box.

1 2 3 4 5

Sin comentarios

Laurel-electronics Laureate Digital Panel Meter for Load Cell & M Manual de usuario Pagina 3