WEIGHING INSTRUMENTS

WTD3

DIGITAL WEIGHT TRANSMITTER
FOR LOAD CELLS

WTD3 is a strain gage load cells conditioner with weight digital transmission, by RS485 serial interface. Easy installation and immediate use make this product suitable for specific requests of industrial applications. It is available with plastic box for bus mounting through special connector for DIN rail mounting.

Diagnostics LED for power supply and communication verification

DIN rail mounting and serial bus connection

The system is equipped with terminal blocks for the RS485 bus and 24V dc power supply interconnections.

The maximum number of connectable devices is 31 on the communication bus

GENERAL CHARACTERISTICS

DIGITAL WEIGHT TRANSMITTER FOR LOAD CELLS
 DIN rail mounting, with galvanic isolation

  • Factory calibration range: 0 – 4 mV/V
  • Dip switch setup: digital filter configuration, module address and baude rate
  • Low profile DIN rail mounting (h 7,5 mm)
  • Up to 4: 350 ohm load cells connected
  • RS485 serial interface ModBus RTU protocol
  • Compliant with EMC Directive 2004/108/EC and it was tested according to EN 61000-4 and EN 61000-6 harmonized standards for industrial environment

Galvanic isolation through DC/DC converter between 24V dc power supply, the load cell and the RS485 bus for a better reduction of possible interferences coming from the PLC interface. The transmitter is factory calibrated and no calibration procedure is required from the user.


TECHNICAL CHARACTERISTICS

Power supply:

24 Vdc + 10%  3W max

Max current:

150 mA

Thermal range:

from 0°C to +45°C

Load cells supply:

5 Vdc

Input signal:

from  – 4mV/V to + 4mV/V

 RS485 output:

19 bit + sign

Communication protocol:

ModBus RTU

Linearity:

0,01 %

Baud rate:

9600, 19200, 57600, 115200

Conversions:   

10 samples per sec

Digital filter:

8, 16, 32, 64 averaged values

Dimensions:

23 x 99 x 111 mm (W x H x D)

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