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Separate type LF470/LF622 flowmeter
Instrument panel : Ordered separately
Grounding with 100Ω or less
ground resistance
Power switch
(External double-pole power switch)
Power supply
Current output (4～20mAdc)
or PROFIBUS
Digital input
(20～30Vdc)
or Modbus
Digital output 2
Signal common for DI and DO
Digital output 1
Grounding with 100Ω or less
ground resistance
Figure 6. Separate type LF470/LF622 flowmeters wiring Diagram
Power cable
I/O cable
Table 1. LF622 Converters Signal Table
Symbol
Description
L1 (＋)
Power supply
L2 (－)
GND
Ground (for arrester)
FG
Frame ground
DI
Digital Input (20～30Vdc)
DO1
Digital Output 1
DO2
Digital Output 2
COM
Signal Common for DI, DO1, DO2
＋
Current Output (4～20mAdc)
or PROFIBUS
－
X
Y
Excitation Output
E
A
B
Signal Input
G
Note: Symbol of the terminal is changed as follows for Modbus.
DO2 → T+,
DI → T-,
Symbol
Description
T+
Modbus(+)
T-
Modbus(-)
TG
Modbus(GND)
Connected detector
Cable
Power cable
I/O cable
Shielded cable for
PROFIBUS-PA
Excitation cable
(for LF622, LF622F only)
Signal cable
(for LF622, LF622F only)
COM → TG
Cable
Twist-pair polyethylene
insulated vinyl sheath cable
(JKEV,AWG24(0.2mm
TIC-LF470H
2
Ⅳ wire 5.5mm
or more
Grounding with 100Ω or less
ground resistance
Thick walled steel conduit
Signal cable
(2-wire shielded hard-rubber sheathed cable)
Excitation cable
(3-wire shielded hard-rubber cable)
2
))
5
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