Load Cell Systems TLB4 Manuale utente

Installation and User Manual

version 1.04

TLB4

2014/30/UE

EN55022:2010 EN61000-6-2:2005 EN61000-6-4:2007

SYSTEM IDENTIFICATION

Web: https://loadcellsys.com

Email: sales@loadcellsys.com

Phone: 607-426-1467

KEY TO SYMBOLS

Below are the symbols used in the manual to draw the reader's attention:

Warning! Risk of electrocution.

Warning! This operation must be performed by skilled workers.

Read the following indications carefully.

Further information.

GUARANTEE

24 months from the delivery document date. The guarantee covers only defected parts and includes the replacement parts and

labour. All shipping and packing costs are paid by the customer. It is possible to have the repair in guarantee on condition that the

returned product has not been transformed, damaged or repaired without authorization. No guarantee is applicable on returned

products without the original label and/or serial number. No guarantee against misuse.

Batteries: LCS provides 1 year guarantee from the date of delivery note, against material defects or battery manufacturing faults.

Disposal of Waste Equipment by Users in Private Households in the European Union

This symbol on the product or on its packaging indicates that this product must not be disposed of with

your other household waste. It is your responsibility to dispose of your waste equipment by handing it

over to a designated collection point for the recycling of waste electrical and electronic equipment. The

separate collection and recycling of your waste equipment at the time of disposal will help preserve

natural resources and protect human health and the environment. For more information about where you

can drop off your waste equipment for recycling, please contact your local waste disposal Authority or

the equipment retailer.

TABLE OF CONTENTS

USER WARNINGS................................................................................................................. 1

RECOMMENDATIONS FOR CORRECT INSTALLATION OF WEIGHING INSTRUMENTS. 1

RECOMMENDATIONS FOR CORRECT INSTALLATION OF THE LOAD CELLS ............... 1

LOAD CELL INPUT TEST (QUICK ACCESS) ......................................................................... 3

LOAD CELL TESTING............................................................................................................. 3

MAIN SPECIFICATIONS OF THE INSTRUMENT.................................................................. 4

TECHNICAL SPECIFICATIONS ............................................................................................ 5

ELECTRICAL CONNECTIONS.............................................................................................. 6

BASIC INFORMATION............................................................................................................. 6

WIRING DIAGRAM................................................................................................................... 6

LED AND KEYS FUNCTIONS ............................................................................................... 8

MENU MAP ............................................................................................................................ 9

SETPOINT................................................................................................................................ 9

SYSTEM PARAMETERS ......................................................................................................... 9

INSTRUMENT COMMISSIONING........................................................................................ 11

PROGRAMMING OF SYSTEM PARAMETERS .................................................................. 12

THEORETICAL CALIBRATION ............................................................................................. 12

MAXIMUM CAPACITY ....................................................................................................................13

TARE WEIGHT ZERO SETTING.....................................................................................................13

ZERO VALUE MANUAL ENTRY.....................................................................................................14

REAL CALIBRATION (WITH SAMPLE WEIGHTS)............................................................... 15

CONFIRMATION AND CHANGE OF ACTIVE CHANNELS................................................... 16

EQUALIZATION ..................................................................................................................... 17

FILTER ON THE WEIGHT...................................................................................................... 18

ANTI PEAK......................................................................................................................................18

ZERO PARAMETERS............................................................................................................ 19

RESETTABLE WEIGHT SETTING FOR SMALL WEIGHT CHANGES ..........................................19

AUTOMATIC ZERO SETTING AT POWER-ON..............................................................................19

ZERO TRACKING ...........................................................................................................................19

SETTING UNITS OF MEASURE............................................................................................ 20

DISPLAY COEFFICIENT .................................................................................................................20

OUTPUTS AND INPUTS CONFIGURATION ......................................................................... 22

SEMI-AUTOMATIC TARE (NET/GROSS).............................................................................. 23

PRESET TARE (SUBTRACTIVE TARE DEVICE) ................................................................. 24

SEMI-AUTOMATIC ZERO (WEIGHT ZERO-SETTING FOR SMALL VARIATIONS) ............ 24

PEAK...................................................................................................................................... 25

ANALOG OUTPUT (TLB4 ONLY).......................................................................................... 25

SERIAL COMMUNICATION SETTING .................................................................................. 27

RS485 SERIAL COMMUNICATION ................................................................................................28

DIRECT CONNECTION BETWEEN RS485 AND RS232 WITHOUT CONVERTER.......................29

AUTOMATIC DIAGNOSTICS OF LOAD DISTRIBUTION...................................................... 29

TEST....................................................................................................................................... 30

EVENTS LOG......................................................................................................................... 31

INFO MENU............................................................................................................................ 31

SETPOINT PROGRAMMING............................................................................................... 32

USE WITH W SERIES INSTRUMENTS ............................................................................... 33

CONNECTION TO THE WEIGHT INDICATOR ...................................................................... 33

ADDITIONAL MENU MAP...................................................................................................... 34

TLB4 REMOTE CONTROL .................................................................................................... 35

REMOTE KEYPAD LOCKING.........................................................................................................35

ADDITIONAL ALARMS.......................................................................................................... 35

ALARMS .............................................................................................................................. 36

PRINTING EXAMPLES........................................................................................................ 38

FRONT PANEL MOUNTING................................................................................................ 40

RESERVED FOR THE INSTALLER..................................................................................... 41

MENU LOCKING.................................................................................................................... 41

MENU UNLOCKING............................................................................................................... 41

TEMPORARY MENU UNLOCKING ....................................................................................... 41

DATA DELETION AND PROGRAM SELECTION ................................................................. 41

KEYPAD OR DISPLAY LOCKING......................................................................................... 42

- 1 -

USER WARNINGS

RECOMMENDATIONS FOR THE PROPER USE OF WEIGHING INSTRUMENT

-Keep away from heat sources and direct sunlight

-Repair the instrument from rain (except special IP versions)

-Do not wash with water jets (except special IP versions)

-Do not dip in water

-Do not spill liquid on the instrument

-Do not use solvents to clean the instrument

-Do not install in areas subject to explosion hazard (except special Atex versions)

-If the working temperature reaches the permitted limits, it is advisable to distance the instruments

to ensure adequate air flow and avoid malfunctions (e.g.: sudden shutdowns or disconnections)

RECOMMENDATIONS FOR CORRECT INSTALLATION OF WEIGHING INSTRUMENTS

The terminals indicated on the instrument’s wiring diagram to be connected to earth must

have the same potential as the weighed structure (same earthing pit or earthing system). If

you are unable to ensure this condition, connect with an earthing wire the terminals of the

instrument (including the terminal –SUPPLY) to the weighed structure.

The cell cable must be individually led to its panel input and not share a conduit with other cables;

connect it directly to the instrument terminal strip without breaking its route with support terminal strips.

Use “RC” filters on the instrument-driven solenoid valve and remote control switch coils.

Avoid inverters in the instrument panel; if inevitable, use special filters for the inverters and separate

them with sheet metal partitions.

The panel installer must provide electric protections for the instruments (fuses, door lock switch

etc.).

It is advisable to leave the equipment always switched on to prevent the formation of condensation.

MAXIMUM CABLE LENGTHS

-RS485: 1000 metres with AWG24, shielded and twisted cables

-Analog current output: up to 500 metres with 0.5 mm2 cable

-Analog voltage output: up to 300 metres with 0.5 mm2cable

RECOMMENDATIONS FOR CORRECT INSTALLATION OF THE LOAD CELLS

INSTALLING LOAD CELLS: The load cells must be placed on rigid, stable in-line structures; it

is important to use the mounting modules for load cells to compensate for misalignment of the

support surfaces.

PROTECTION OF THE CELL CABLE: Use water-proof sheaths and joints in order to protect the

cables of the cells.

- 2 -

MECHANICAL RESTRAINTS (pipes, etc.): When pipes are present, we recommend the use of

hoses and flexible couplings with open mouthpieces with rubber protection; in case of hard pipes,

place the pipe support or anchor bracket as far as possible from the weighed structure (at a distance

at least 40 times the diameter of the pipe).

WELDING: Avoid welding with the load cells already installed. If this cannot be avoided, place the

welder ground clamp close to the required welding point to prevent sending current through the load

cell body.

WINDY CONDITIONS - KNOCKS - VIBRATIONS: The use of weigh modules is strongly

recommended for all load cells to compensate for misalignment of the support surfaces. The system

designer must ensure that the plant is protected against lateral shifting and tipping relating to:

shocks and vibration; windy conditions; seismic conditions in the installation setting; stability of the

support structure.

EARTHING THE WEIGHED STRUCTURE: By means of a copper wire with suitable cross-section,

connect the cell upper support plate with the lower support plate, then connect all the lower plates to

a single earthing system. Electrostatic charges accumulated because of the product rubbing against

the pipes and the weighed container walls are discharged to the ground without going through or

damaging the load cells. Failure to implement a proper earthing system might not affect the

operation of the weighing system; this, however, does not rule out the possibility that the cells and

connected instrument may become damaged in the future. It is forbidden to ensure earthing system

continuity by using metal parts contained in the weighed structure.

FAILURE TO FOLLOW THE INSTALLATION RECOMMENDATIONS WILL BE CONSIDERED

A MISUSE OF THE EQUIPMENT

OK OK

NO NO

- 3 -

LOAD CELL INPUT TEST (QUICK ACCESS)

From the weight display, press for 3 seconds: the display shows the response signal of each

load cell ( ÷ ) expressed in mV with three decimals.

Example: a load cell with 2.000 mV/V sensitivity provides a response signal between 0 and 10 mV.

LOAD CELL TESTING

Load cell resistance measurement (use a digital multimeter):

-Turn off the instrument.

-The value between the positive signal wire and the negative signal wire must be equal or similar

to the one indicated in the load cell data sheet (output resistance).

-The value between the positive excitation wire and the negative excitation wire must be equal or

similar to the one indicated in the load cell data sheet (input resistance).

Load cell voltage measurement (use a digital multimeter):

-Turn on the instrument.

-Take out the load cell to be tested from underneath the container, or alternatively, lift the

container support.

-Make sure that the excitation of two wires of the load cell connected to the instrument (or

amplifier) is 5 VDC ±3%.

-Measure the response signal between the positive and the negative signal wires by directly

connecting them to the tester, and make sure that it is comprised between 0 and 0.5 mV.

-Apply load to the cell and make sure that there is a signal increment.

IF ONE OF THE ABOVE CONDITIONS IS NOT MET, PLEASE CONTACT THE TECHNICAL

ASSISTANCE SERVICE.





3 s

- 4 -

MAIN SPECIFICATIONS OF THE INSTRUMENT

Weight transmitter with 6-wire load cells inputs suitable for assembly on back panel fitted

Omega/DIN rail or on front panel using the included mounting kit. Dimensions: 26x115x120 mm.

Six-digit semialphanumeric display, 8 mm height, 7 segment. Four-key keyboard.

RS485 serial port for connection to: PC/PLC up to 32 instruments (max 99 with line repeaters)

by ASCII or ModBus R.T.U. protocol, remote display, printer. Optional: integrated Profibus DP,

DeviceNet, CANopen, Profinet IO, Ethernet/IP, Ethernet TCP/IP, Modbus TCP, RS232/

RS485, SERCOS III, PowerLink, CC-Link output.

TLB4 only: optoisolated 16 bit analog output (tension or current).

8 independent channels:automatic detection of connected load cells.

Digital equalization: load cell response uniformed via software.

Load distribution: indication of the weight percentage on each load cell.

Automatic diagnostics: load distribution check to detect any faults.

Events log: storage of the last 50 events: calibrations, zero-settings, errors, equalizations.

Alarm Relay: outputs can be set to switch in case of alarm.

- 5 -

TECHNICAL SPECIFICATIONS

POWER SUPPLY and CONSUMPTION

12/24 VDC ±10%; 5 W

No. OF LOAD CELLS IN PARALLEL and SUPPLY

max 16 (350 ohm); 5 VDC / 240 mA

LINEARITY

< 0.01% F.S.

ANALOG OUTPUT LINEARITY (TLB4 only)

< 0.01% F.S.

THERMAL DRIFT

< 0.0005% F.S./°C

ANALOG OUTPUT THERMAL DRIFT (TLB4 only)

< 0.003 % F.S./°C

A/D CONVERTER

4 channels, 24 bit (16000000 points), 4.8 kHz

DIVISIONS

(with measurement range ±10 mV = sens. 2 mV/V)

±999999

MEASUREMENT RANGE

±39 mV

MAX SENSITIVITY OF USABLE LOAD CELLS

±7 mV/V

MAX CONVERSIONS PER SECOND

600 conversions/second

DISPLAY RANGE

±999999

NO. OF DECIMALS / DISPLAY INCREMENTS

0÷4 / x 1 x 2 x 5 x 10 x 20 x 50 x 100

DIGITAL FILTER / READINGS PER SECOND

11 levels / 5÷600 Hz

RELAY OUTPUTS

N. 3 - max 115 VAC; 150 mA

DIGITAL INPUTS

N. 2 - optoisolated 5 - 24 VDC PNP

SERIAL PORTS

RS485

BAUD RATE

2400, 4800, 9600, 19200, 38400, 115200

HUMIDITY (non condensing)

85%

STORAGE TEMPERATURE

-30°C +80°C

WORKING TEMPERATURE

-20°C +60°C

OPTOISOLATED ANALOG OUTPUT (TLB4 only)

16 bit - 65535 divisions

0÷20 mA; 4÷20 mA (max 300 ohm);

0÷10 V; 0÷5 V, ±10 V; ±5 V (min 10 kohm)

RELAY OUTPUTS

N. 3 - max 30 VAC, 60 VDC; 150 mA

WORKING TEMPERATURE

-20°C +50°C

Equipment to be powered by 12-24 VDC LPS or Class 2 power source.

- 6 -

ELECTRICAL CONNECTIONS

BASIC INFORMATION

-It is recommended that the power supply negative pole be grounded.

-It is possible to supply up to 16 350 ohm load cells.

-Connect terminal “–SUPPLY” to the RS485 common of the connected instruments in the event

that these receive alternating current input or that they have an optically isolated RS485.

-In case of an RS485 network with several devices it is recommended to activate the 120 ohm

termination resistance on the two devices located at the ends of the network, as described in the

paragraph RS485 SERIAL CONNECTION.

WIRING DIAGRAM

In case of difficulty connecting all the reference wires of the installed load cells, simply connect

those of the load cell located at the average distance from the instrument. The reference wires not

used must be individually isolated.

USE OF 4-WIRE LOAD CELLS: if all the load cells used are 4-wire, make a jumper between -EX

(26)and -REF (22) and between +EX (25) and +REF (21).

LOAD CELL 1 LOAD CELL 2 LOAD CELL 3 LOAD CELL 4

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

+SIG

-SIG

+EX

-EX

+REF

-REF

+SIG

-SIG

+EX

-EX

+REF

-REF

+SIG

-SIG

+EX

-EX

+REF

-REF

+SIG

-SIG

+EX

-EX

+REF

-REF

1 2 345678 9

OUT 1

OUT 2

OUT 3

OUT COMMON

IN 1

IN 2

IN COMMON

+12/24 VDC

0 VDC

12/24 VDC

SUPPLY

INPUTS

supply 5÷24 VDC

OUTPUTS

max 115 VAC 150 mA

10 11 12

+ 0÷20 - 4÷20 mA

+ 0÷10 VDC

ANALOG

OUTPUT

- COMMON

TLB4 ONLY

+ RS485

- RS485

RS485

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