Connecting The Load Cells - Siemens SIWAREX WT241 Manual

Connecting

6.3 Connecting the load cells

6.3 Connecting the load cells
Overview
Pickups can be connected to the SIWAREX WT241 electronic weighing system which are
equipped with strain gauges (full bridge) and meet the following requirements.
● Characteristic value 1 to 4 mV/V
● A supply voltage of 5 V is permitted
● Maximum cable length between WT241 and junction box 1 000 m
The power supply for the load cells is 4.85 V.
The following condition must be satisfied in order to check the maximum possible number of
load cells which can be connected to a WT241:
● Scale operation without Ex interface: (input resistance of load cell) / (number of load
cells) > 40 Ohm
● Scale operation with Ex interface: (input resistance of load cell) / (number of load cells) >
50 Ohm
28
SIWAREX WT241
Manual, 05/2015, A5E36046748A