Toshiba TIC-LF494B manual Model LF610 and LF612 converters

TIC-LF494B

Model LF610 and LF612 converters

Input signals

Analog signal — the voltage signal from detector, proportional to process flow rate (for LF612 separate type converter).

Digital input DI (opt.)

Signal type: 20 to 30Vdc voltage signal

Input resistance: 2.7kΩ

Number of inputs: one point

DI function — One of the following functions can be assigned to the optional DI signal.

Range switching — Selects either the higher or lower range in the unidirectional or bidirectional 2-range setting.

Totalizer control — Starts and stops the built-in totalizer.

Fixed-value outputs —Outputs fixed-values for current and pulse outputs.

Zero adjustment — Executes zero adjustment (on-stream at zero flow rate).

Output signals

Current output:

4–20mAdc (load resistance 0 to 750Ω) 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.

Digital output DO1 (std.):

Output type: Transistor open collector

Number of outputs: One point

Output capacity: 30Vdc, 200mA maximum

Digital output DO2 (opt.):

Output type: Solidstate relay output (non polarity)

Number of outputs: One point

Output capacity: 150Vdc, 150mA maximum or 150Vac (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 outputs (Note 2)

•Empty pipe alarm output

•Digital Output Active Status (DO1 and DO2) (Note 2)

•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.

When power failure occurs, unit will be fault 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 750Ω

Load capacitance: 0.25µF maximum

Load inductance: 4mH maximum

•PROFIBUS (opt.)

Protocol : PROFIBUS-PA

Baud rate : 31.25kbps

Bus voltage : 9-30VDC

Consumption electric current of bus:less than 16mA

Manufacture Ident-No. : 093BHEX

Standard Ident-No. : 9740HEX

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 one second increments)

“Field re-verification” Mag-Prover– Toshiba’s

Zero span calibration tool allows unit to be re-calibrated and verified using an internal software program. (For more information contact Toshiba International Corp.)

Conditions 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. The outputs and display will remain as follows when power fails.

• Current output: 0mAdc

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