Flintec FAD-30 - Manual (Page 11)

FAD-30 Technical Manual, Rev. 1.06 December 2012 Page 11 of 48
The quality of the instrument‟s ground will determine the accuracy and the safety of your measuring system. A
proper ground connection is needed to minimize extraneous electrical noise effects on the measurement. A
poor ground can result in an unsafe and unstable operation. It is important that the instrument should not share
power lines with noise-generating equipment such as heavy load switching, motor control equipments,
inductive loads, etc. If the condition of the power line in the plant is poor, prepare a special power line and
grounding. Before interfering the instrument, turn off the power and wait at least for 30 seconds.
4.2.2. Load Cell Connection
To avoid damages, the load cell wiring should be made carefully before energizing the instrument. Load cell
connection details are shown below in figure 4.2. In 4-wire installations the sense and excitation pins with the
same polarity should be short circuited at the connector side. If you have a junction box in your system, use a 6
wire cable between FAD-30 and the junction box, and short circuit these pins at junction box for better
performance.
Load Cell
Connector 4 wire LC connection 6 wire LC connection
Warning: Connect the load cell cable shield to the reference ground or the
shield pin of the load cell connector.
Figure 4.2
– Load cell connection
4.2.3. Communication Interface
Please refer to the corresponding chapter:
FAD-30 (RS485) see chapter 6.2
FAD-30MB (Modbus RTU) see chapter 6.2
FAD-30PB (Profibus) see chapter 7.2
FAD-30PN (ProfiNet) see chapter 8.2
FAD-30EN (Ethernet and Modbus TCP) see chapter 9.2
FAD-30CO (CANopen) see chapter 10.2
4.3. Commissioning
PRECAUTION: Please read this manual carefully before energizing the instrument. Perform the commissioning
operation according the procedure given in this chapter. Only trained persons are allowed for cleaning,
commissioning, checking and servicing of the instrument. The interference of untrained person may cause
some unwanted damages or injuries.
Before energizing the instrument, please make the required mechanical and electrical installations. After power
on, you have to setup your FAD-30 instrument before you can start to use the bus interface.
Install the xFace software onto your PC as described in chapter 5 Setup. The xFace software is used for setup,
calibration and testing of FAD-30xx instruments.
After you have successfully checked the performance of the instrument with xFace, you can begin to use the
instrument in your application.