User Manual for LEVIFLOW
®
LFSC-D Flowmeters
www.levitronix.com
PL-4507-00, Rev08, DCO# 20-024
13
1. If communication over the RS485 bus is used, check the address settings of the potentiometers on
the front panel of the converter (see
). The total address is:
“High ADRS” x 10 + “Low
ADRS” x 1.
2. The
Levitronix
®
Service Software
can be used to debug and configure the flowmeter over the RS485.
For communication with RS485 the MODBUS protocol can be requested at
Levitronix
.
3.1.2 Instructions for Electrical Installation
1. Remove the DC power from the converter.
2. Remove the interface connector (see
) from the converter.
3. Attach the necessary wires (AWG 14-26) according to the pin specifications in
. Strip the
sheath approximately 3 mm from the wires end. Insert core into terminal to the end and tighten the
screw. Confirm that the wires are securely fixed by pulling it gently by hand.
4.
Note: The Field Ground (FG) represents an additional ground potential, which is connected internally
to the signal ports of the converter via varistors. Depending on the specific setup, it might be
advantageous from an EMC perspective to connect the FG to the PE. However, in case the FG is
connected to PE the entire grounding concept of the field installation must be considered in order to
avoid stray and compensating currents triggered by electrical potential differences. If compensating
currents between PE and Ground may occur, the FG should not be connected.
5. For usage of a fuse at the power input (24 VDC) a 200 mA slow-blow type is recommended. The
peak current (inrush current) after power on of the converter (as specified in
) has to be
considered, when choosing the fuse type and the AC/DC power supply.
6. Mount the interface connector to the converter and tighten the 2 connector screws.
7. To attach the sensor to the converter extension cables according to
increase robustness against disturbance from other devices or to reduce cross-talking between
multiple flowmeters, the converter comes delivered with an EMI ferrite, which shall be attached to the
sensor cable near to the converter (see
Figure 12: Assembly of EMI ferrite
8. Before powering on check again all wiring connections. Confirm that the terminals are securely
fastened and that there is no possibility of short circuit.
