Communications Function; Connections With Configurator - Toshiba LF620 B Series Instruction Manual

11. Communications Function

The LF62*B Series Electromagnetic Flowmeter uses the HART*1 protocol to transmit digital signals
over the 4-20mA output line. The BF100 configurator is used to communicate with the LF62* using the
HART protocol. Through remote operation, you can check or change the various parameters, calibrate
the flowmeter or monitor the measurement value.
For detailed operation and specifications of configurator, refer to the instruction manual of the BF100
configurator for sensor with communication function.
*1 HART protocol:
HART, Highway Addressable Remote Transducer, is a communication protocol for industrial
sensors recommended by FieldComm Group .
"HART" is a registered trademark of FieldComm Group.
By adding an optional Modbus communication board to the converter, the converter can be used as a
Modbus slave device to communicate digital data withModbus master device .
For details of Modbus communication, refer to the instruction manual of PROFIBUS or Modbus
Communication for LF62*B.

11.1 Connections with configurator

Connect the input cable of configurator across the load resistance connected from the current output
terminals (+ and −). Since the cable end is a pair of clips, use a junction terminal or terminal block to
connect with the load resistance. To connect the configurator directly to the flowmeter, use the terminals
+ and −. The configurator input cable has no polarity.
See Figures 11.1 and 11.2 for connection examples.
Regarding the release of the successor model of the BF100 type configurator, please contact our sales
office or distributor.
4 to 20 mAdc
( communication line ) →
Load resistance
BF 100
Configurator
Terminal block or
junction terminal
Figure 11.1 Connections to the Current Output Line
－ 139 －
6 F 8 A 0 9 9 7