Toshiba LF620 Manual

Also see for LF620: Manual Manual Instruction manual

TIC-LF620EIntroductionCombined with a multi-functional converter LF620(combined type) or LF622 (separate type) equippedwith its original noise-suppression circuit andadvanced algorithms. IR (Infrared) switches enableparameter setting of the converter without removingthe cover. Flow direction can be set in either way, andits 128 x 128 dot matrix LCD display allows the LCDto be rotated electronically to 90, 180 and 270 degreeswithout opening the cover. The terminal block in LCDside make easy to wire in case of the combined type.*1: HART protocol (Highway Addressable Remote Transducer) is acommunication protocol for industrial sensors recommended by theHCF (HART Communication Foundation).** DevComm2000 Smart Device Communicator availablethrough TIC for performing HART device configurations onPC or laptop.*2: PROFIBUS is the communication protocol for factory automation andprocess automation that the PROFIBUS Organization recommends.Instead of analog control with a conventional analog signal (4-20mA),it is one kind of the fieldbus which digitizes all signals. Flowmeterssupport PROFIBUS-PA.*3: Modbus is the communication protocol that Modicon Inc. developed.Physical layer is RS485.LF620 LF622LF620F LF622FFigure1. LF620 series Flowmeter ConvertersSpecifications Model LF620 and LF622 convertersInput signalsAnalog signal — the voltage signal from detector,proportional to process flow rate (For LF622separate type converter).Digital input DISignal type: 20 to 30Vdc voltage signalInput resistance: 2.7kNumber of inputs: one pointNote: DI cannot be used with the Modbuscommunication.DI function — One of the following functions canbe assigned to the optional DI signal.Range switching — Selects either the higher orlower range in the unidirectional orbidirectional 2-range setting.Totalizer control — Starts and stops the built-intotalizer.Fixed-value outputs — Outputs fixed-values forcurrent and pulse outputs.Zero adjustment — Executes zero adjustment(on-stream at zero flow rate).Output signalsCurrent output:4–20mAdc (load resistance 0 to 750)Note: The current output cannot be used withthe PROFIBUS-PA communication.Digital outputs — Two points are available asfollows.Digital output DO1 :Output type: Transistor open collectorNumber of outputs: One pointOutput capacity: 30Vdc, 200mA maximumNote: DO1 cannot be used if Modbuscommunication connection is 3 lines.Digital output DO2 :Output type: Solidstate relay output (nonpolarity)Number of outputs: One pointOutput capacity: 150Vdc, 150mA maximumor 150 V ac (peak to peak), 100mA maximumNote: DO2 cannot be used with the Modbuscommunication.Field Intelligent Device SeriesElectromagnetic Flowmeter Converter LF620,LF622Certification numberZ01207