USE AND MAINTENANCE MANUAL – DLC
NET
Series
LOGIC S.r.l. - M0145Db.docx
Mod. L0006A01 of 30/05/2016
2.7 Technical specifications
2.7.1 General
specifications
The conditioner and digital weight transmitter DLC
NET
is designed for interfacing to
strain gauge transducers with collecting data or industrial automation systems via
Profibus-DP
®
or Profinet
®
interface.
The board is calibrated in factory in the range of 0 ÷ 4 mV/V and does not
require no further adjustment by the customer.
The board is available in aluminum case for DIN rail mounting.
The instrument allows the transmission of data weight and diagnostics via fieldbus.
The maximum number of DLC
NET
Profibus-DP
®
is 128. The maximum number of
Profinet
®
nodes is limited by application.
In addition to these functionality, the board can be interfaced with a remote display
as a weight repeater (to be installed in safe or hazardous area) through a serial
port RS-485 (in addition to the fieldbus connection).
2.7.2 Principle of operation
The DLC
NET
module is a load cells signal amplifier. The supply voltage of the
transducer is 5 Vdc with the possibility of 4 or 6 wire connection. With six-wire
connection, you make a correct voltage drop compensation on the connecting
cables, for greater accuracy.
The fieldbus and power supply of the load cell are galvanically isolated via DC /
DC converter, among the 24 Vdc power supply. This allows the connection of
several weighing systems to a data collection system (PLC or PC) with the use of
the same power supply (+24 Vdc) common to other devices without any kind of
problem.
Figure 2. Diagram of operation and power supplies
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