Toshiba LF620 User manual

TIC-LF620E
Introduction
Combined with a multi-functional converter LF620
(combined type) or LF622 (separate type) equipped
with its original noise-suppression circuit and
advanced algorithms. IR (Infrared) switches enable
parameter setting of the converter without removing
the cover. Flow direction can be set in either way, and
its 128 x 128 dot matrix LCD display allows the LCD
to be rotated electronically to 90, 180 and 270 degrees
without opening the cover. The terminal block in LCD
side make easy to wire in case of the combined type.
*1: HARTprotocol (Highway Addressable Remote Transducer) is a
communication protocol for industrial sensors recommended by the
HCF (HARTCommunication Foundation).
** DevComm2000 Smart Device Communicator available
through TIC for performing HART device configurations on
PC or laptop.
*2: PROFIBUS is the communication protocol for factory automation and
process 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. Flowmeters
support PROFIBUS-PA.
*3: Modbus is the communication protocol that Modicon Inc. developed.
Physical layer is RS485.
LF620 LF622
LF620F LF622F
Figure1. LF620 series Flowmeter Converters
Specifications
Model LF620 and LF622 converters
Input signals
Analog signal — the voltage signal from detector,
proportional to process flow rate (For LF622
separate type converter).
Digital input DI
Signal type: 20 to 30Vdc voltage signal
Input resistance: 2.7k
Number of inputs: one point
Note: DI cannot be used with the Modbus
communication.
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 750)
Note: The current output cannot be used with
the PROFIBUS-PA communication.
Digital outputs — Two points are available as
follows.
Digital output DO1 :
Output type: Transistor open collector
Number of outputs: One point
Output capacity: 30Vdc, 200mA maximum
Note: DO1 cannot be used if Modbus
communication connection is 3 lines.
Digital output DO2 :
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
Note: DO2 cannot be used with the Modbus
communication.
Field Intelligent Device Series
Electromagnetic Flowmeter Converter
LF620,LF622
Certification number
Z01207
M.A. Selmon Company, Inc
4 Oxford Rd.
Milford, CT 06460
203-377-3525

TIC-LF620E
2
DO1 and DO2 functions — One of the following
functions can be assigned to DO1 and/or DO2
• Pulse output (available only for DO1,DO2)
Pulse rate: Max 10kHz (10,000pps) (DO1)
Max 100Hz ( 100pps) (DO2)
(Over 1kpps, auto-setting)
Pulse width: 0.3 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 (Note 2)
• Preset count output
• Converter failure alarm output(Note 2)
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 750
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. : 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
• Modbus(opt.)
Physical layer : RS485
Protocol : Modbus
Mode : RTU
Baudrate : 4800, 9600, 19200bps
Data length : 8bit
Parity bit : None, Odd, Even
Stop bit : 1bit, 2bit
Error check : CRC-16
Max. station number : 32(with Master device)
Max. cable length : 1.2km (Note)
Note: This length is specification of 3 line
connection.
LCD display: Full dot-matrix 128×128 dot LCD
display (back-light provided)
A parameter change will rotate the display.
Parameter settings — Parameters can be set as
follows:
• IR Switches: Three key switches are provided to
set configuration parameters.
• Digital communication: HART, PROFIBUS or
Modbus 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)
Zero and span calibration: Built-in calibration
signal source allows converter unit check.
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
• Digital output: OFF
• LCD display: No display
• PROFIBUS: No communication
Power supply:
One of the following can be selected:
• 100 to 240Vac, 50/60Hz
(allowable voltage 80 to 264Vac)
110Vdc
(allowable voltage 90 to 130Vdc)
• 24Vdc (allowable voltage 18 to 36Vdc)
Surge protection: Arresters are installed in the
power supply, and a current signal output circuit.
Structure:
IP 67 and NEMA 4X Watertight
Case: Aluminum alloy (equivalent of IP 67)
Coating: Acrylic resin-baked coating, pearl-gray
colored
Cable connection ports:
Cable glands —
LF620 and LF622 without cFMus Approval:
Provided as standard
OD of cableφ11~13mm
Material Nylon 66
G (PF) 1/2 male threads..
Note: When PROFIBUS or Modbus option is
specified , cable gland size is φ6～
8mm for signal cable, φ11～13mm
for power cable
LF620F and LF622F with cFMus Approval:
Not provided, 1/2-14NPT male
threads are required.

TIC-LF620E
3
Applicable diameter —11 to 13mm
(0.433 to 0.512 inch)
Vibration resistance:
No resonance to the following levels of vibration:
• 10 to 150Hz with acceleration of 9.8m/s2
• Vibration of 30Hz with 29.4 m/s2 in 4h in each
direction will not cause any defect to unit.
Note: Avoid using the flowmeter in an environment
with constant vibration.
Converter LF622 dimensions and weights:
See Figure 2 (for Separate type)
MTBF:220,000 hours at 25 deg.C (77 deg.F) based
on MIL-HDBK-217F

TIC-LF620E
4
Installation
Dimension
Figure 2. Separate type converter LF622 and LF622F
N
ote: Cable glands are not provided for LF622F cFMus approved type.
Refer to the part Cable connection port at detector.
LCD display
Attachment
I/O cable ground
Excitation cable ground
Power supply
cable ground
Option cable ground
Signal cable ground
IR Switch
Plate

TIC-LF620E
5
External Connections
Combined type Converter LF620
Grounding with 100
Ω
or less
ground resistance
Instrument panel : Ordered separately
I/O cable
Ⅳwire 5.5mm
2
or more
C
urren
t
ou
t
pu
t
(4
～
20
m
Ad
c
)
or PROFIBUS
Power supply
Power cable
Digital input
(20～30Vdc)
Signal common for DI and DO
Digital output 1
Digital output 2
Grounding with 100Ωor less
ground resistance
or Modbus
Power switch
(External double-pole power switch)
NOTE:
In thecase of the integral type, the signalline
( A, B, G ) and the excitation line ( E, X, Y ) are
the connector joints.
Grounding with 100Ωorless
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 3. Combined type LF620 and LF620F
converters Wiring Diagram

TIC-LF620E
6
G
roun
di
ng w
ith
100
Ω
or
l
ess
g
round resistance
I
ns
t
rumen
t
pane
l
:
O
r
d
ere
d
separa
t
e
ly
I/O cable
Grounding with100Ωor less
ground resistance
Ⅳwire 5.5mm
2
ormore
C
urren
t
ou
t
pu
t
(4
～
20
m
Ad
c
)
o
r PR
O
FIB
US
P
ower supp
ly
Power cable
Di
g
it
a
l
i
npu
t
(
20～30Vdc
)
Si
gna
l
common
f
or
DI
an
d
DO
Digital output 1
Di
g
it
a
l
ou
t
pu
t
2
G
roun
di
ng w
ith
100
Ω
or
l
ess
ground resistance
or Modbus
Signal cable
(2-wireshielded hard-rubber sheathedcable)
Connected detector
Excitation cable
(3-wire shielded hard-rubber cable)
Thick walled steel conduit
Powerswitch
(External double-pole power switch)
Symbol Description Cable
L1 (＋) Power supply Power cable
L2 (－)
GND Ground (for arrester)
FG Frame groun
d
DI Digital Input (20～30Vdc)
I/O cable
DO1 Digital Output 1
DO2 Digital Output 2
COM Signal Common for DI, DO1, DO2
＋Current Output (4～20mAdc)
or PROFIBUS
－Shielded cable for
PROFIBUS-PA
XExcitation cable
(for LF622,LF622F only)
Y Excitation Output
E
ASignal cable
(for LF622,LF622F only)
B Signal Input
G
T+ Modbus(+) Twisted-pair polyethylene
insulated vinyl sheath cable
(JKEV,AWG24(0.2mm2))
T- Modbus(-)
TG Modbus(GND)
Note: Symbol of the terminal is changed as follows for Modbus.
DO2 →T+, DI →T-, COM →TG
Figure 4. Separate type LF622 and LF622F converters wiring Diagram

TIC-LF620E
7
Wiring Precautions
(1) Connect the grounding wire (IV wire 5.5mm² or
more) to a good earth ground (100or less
ground resistance). Make the wire as short as
possible. Do not use a common ground shared
with other equipment where earth current may
flow. An independent earth ground is
recommended.
(2) The allowable cable lengths between Toshiba
detector and Toshiba converter for the separate
type flowmeter depend on the electrical
conductivity of the object fluid. Refer to each
specification sheet.
(3) DO1, DO2, and DI use the same common
terminal (COM). This COM can not connect to
other equipments which have their own ground
terminal.
(Power supply for connecting to DI or DO,
etc…) Need to wire separately.
Wiring Precautions (PROFIBUS or Modbus)
(1) For wiring path, avoid places near electrical
equipment that may cause electromagnetic
induction or electrostatic induction interference
(such as a motor, transformer and wireless
transmitter).
(2) Use a PROFIBUS-PA cable or a RS485 twist-pair
cable for signal cable. In addition, make sure to
use a shielded cable to improve noise resistance.
Furthermore, installation of signal cable in metal
conduit is recommended.
(3) General cables are designed for indoor use where
cables are not exposed to humidity, rain, etc.
When you install cables, make sure to check the
operating conditions such as the operating
temperature range of the cable by contacting its
manufacturer.
(4)When you carry out cable end treatment of cable,
use a dedicated cable stripper etc. so that the core
wire of the cable will not be nicked or damaged. In
addition, for cables, be careful of allowable
maximum bend diameter etc. (Basically, do not
install cables in a way cables are twisted or bent.)
(5)Consider installing a PROFIBUS-PA arrester in
the communication path of PROFBUS-PA so that
the electromagnetic flowmeter will not be affected by
lightning etc.
(6) The electromagnetic flowmeter is not equipped
with terminating resistors. Use the terminating
resistor unit for PROFIBUS-PA or junction box,
if necessary.
(7) Only one PROFIBUS-PA cable goes through a
cable gland of the Electromagnetic Flowmeter.
Please use the junction box at system
configuration.
(8) Install a terminator to flowmeter that connected to
end of Modbus network.

TIC-LF620E
TIC-LF620E
Table 1. Specification Code for converters
Model Specification Code Contents LF620
type LF622 type
1 2 3 4 5 6 7 8 9 10 11 12 13 14
L F 6 2 Electromagnetic flowmeter converter
0 Combined (Integral) type  –
2 Separate (Remote) type – 
A
F
Purpose
cFMus class I, Division 2 non-approved
cFMus class I, Division 2 approved




A Shape Standard type with case



A
C
E
Converter mounting fitting
None
Panel, Accessory for wall mounting (BNP material: SUS304)
Accessory for pipe installation (BNP material: SUS304)

–
–



2 Digital input/output Digital output points 2 (DO1+DO2) +Digital input point 1 (DI)
 
1
2
3
Current output and Communication function(Note1)
Current output + HART communication
PROFIBUS communication
Current output + Modbus (RS485) communication






1
2
3
Power supply(Note 2)
100Vac-240Vac 50/60Hz, 110Vdc
24Vdc
110Vdc






E Instruction manual English
 
Code explanation: : Standard : Option – : Not available
Note 1: When PROFIBUS communication is provided, current output(4-20mA) and HART communication cannot be used.
When Modbus communication is provided, digital output points 1(DO1) and digital output points(DO2),
digital input point 1(DI), HART communication cannot be used.
Refer Table 2 for more details.
Note2: Select 110Vdc for test report inspected under the condition of 110Vdc.
Table2. Communication functions and output selection table
Selection of Function Availability of outputs
Code
(10th digit)
Selected
Communication 4-20mAdc DO1 DO2 DI
1 HART    
2 PROFIBUS Ｘ 
3 Modbus 
(Note) ＸＸ
Code explanation: :Available Ｘ:Not Available
Note: When digital output 1 function and Modbus communication function are used at one time, TG (signal ground) of the
Modbus communication function cannot be connected (2 line connection).
ISO9001 and ISO14001 are certified.
Misuse of this product can result in damages to property or human injury.
Read related manuals carefully before using this product.
Specifications are subject to change without notice.
Printed in Japan 2011-6 (TDOC)
© TOSHIBA Corporation 2011
All Rights Reserved.