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Figure 5. Separate type converter LF622 and LF622F
External Connections
Combined type LF430/LF620 flowmeter and LF434/LF620F flowmeters
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
or Modbus
Digital output 2
Signal common for DI and DO
Digital output 1
Grounding with 100Ω or less
ground resistance
*1 Locate an external double-pole power switch on the power line near the flowmeter within easy reach of operation.
Use the appropriate switch rating as shown below:
Switch rating: 250Vac, 6A or more
In rush current: 15A or more
Figure 6. Combined type LF430/LF620 and LF434/LF620F flowmeters Wiring Diagram
Attachment
LCD display
Plate
IR Switch
Digital input
(20～30Vdc)
I/O cable
(CVV-S)
Note: Cable glands are not provided for LF622F cFMus approved type.
Refer to the part Cable connection port at detector.
NOTE:
In the case of the integral type, the signal line
( A, B, G ) and the excitation line ( E, X, Y ) are
the connector joints.
Power cable
(CVV)
TIC-LF434H
I/O cable ground
Excitation cable ground
Power supply
Signal cable ground
cable ground
Option cable ground
2
Ⅳ wire 5.5mm
or more
Grounding with 100Ω or less
ground resistance
7
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