Toshiba LF410/LF602 User Manual

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totalizer. 

Fixed-value outputs — Outputs fixed-values for 

current and pulse outputs. 

Zero adjustment — Executes zero adjustment 

(on-stream at zero flow rate). 

4–20mAdc (load resistance  0 to 750

Ω) 

Note: The current output cannot be used with 

the PROFIBUS-PA ccommunication. 

Digital outputs —  One point (std.) and one more 

point is optionally available as follows. 

Output type: Transistor open collector 

Number of outputs: One point 

Output capacity: 30Vdc, 200mA maximum 

Output type: Solidstate relay output (non 

polarity) 

Number of outputs: One point 

Output capacity: 150Vdc, 150mA maximum 

or 150 V ac (peak to peak), 100mA maximum 

DO1 and DO2 functions — One of the following 

functions can be assigned to DO1 (std.) and/or 

DO2 (opt.) 

• Pulse output (available only for DO1,DO2) 

Pulse rate:  3.6 to 36,000,000 pulses/hr (DO1) 

                     3.6 to      360,000 pulses/hr (DO2) 

(Over 3,600,000 pulses/hr, auto-setting) 

Pulse width: 0.5 to 500ms (but less than half of 

the period for 100% flow rate) 
Note: The same and simultaneous  pulse is not 

available between DO1 and DO2.) 

• Multi-range selection outputs (Note 1) 
• High, High high, Low, and/or Low low alarm 

• Empty pipe alarm output 
• Digital Output Active Status (DO1 and DO2) 

• Preset count output 
• Converter failure alarm output 

Note 1: Two outputs (DO1 and DO2) are needed for 

4-range switching and forward/reverse 

2-range switching. 

Note 2: Normal Open (default set) or Normal Close 

is selected for alarm outputs when 

programming. 

The Status when power failure is kept to 

Normal Open. 

Communications output ： 

• HART(std.) 

Digital signal is superimposed on 4–20mAdc 

current signal as follows: 

• Conforms to HART protocol 

Load resistance: 240 to 750

Ω 

Load capacitance: 0.25µF maximum 

Load inductance: 4mH maximum 

• PROFIBUS (opt.) 

Protocol : PROFIBUS-PA 

Baurate : 31.25kbps 

Bus voltage : 9-30Vdc 

Consumption electric current of bus:less than 

16mA 

Manufacture Ident-No. : 093B

HEX 

Standard Ident-No. : 9740

HEX

 

Slave address : 0-126 (Default address is 126) 

Profile : Profile Ver.3.01 for Process Control 

Devices 

Function blocks : AI(Flow)×1 , Totalizer×1 

LCD display: Full dot-matrix 128×128 dot LCD 

display (back-light provided) 

The data on the LCD inside the converter can 

rotate to 90, 180, and 270 degrees by a software, 

without rotating the indicator itself. (Combined 

type only) 

Parameter settings — Parameters can be set as 

follows:  

• IR Switches: Three key switches are provided to 

  set configuration parameters. 
• Digital communication: The AF900 hand-held 

 terminal or PROFIBUS is needed to set 

parameters. 

•Zero adjustment: Zero point adjustment can be 

started by pressing the switch in the converter. 

Damping: 0.5 to 60 seconds (selectable in 1 second 

increments) 

Zero and span calibration: Built-in calibration 

signal source allows converter unit check. 

Conditions when power fails: The outputs and 

display will remain as follows when power fails. 

Parameter setting values are stored in non-volatile 

memory and the values will be restored when the 

power returns to normal condition. 

• Current output: 0mAdc 
• Digital output:  OFF 
• LCD display:  No display 
• PROFIBUS:   No communication 

Power supply: One of the following can be selected: 

• 100 to 240Vac, 50/60Hz (std.) 

(allowable voltage 80 to 264Vac) 

• 24Vdc (allowable voltage 18 to 36Vdc) 
• 110Vdc (allowable voltage 90 to 130Vdc) 

Surge protection: Arresters are installed in the 

power supply, and current signal output circuit. 

Case: Aluminum alloy (equivalent of IP 67)  
Coating: Acrylic resin-baked coating, pearl-gray 

colored