LAUMAS LCB User manual

ENGLISH ENGLISH ENGLISH ENGLISH
Installation Instructions
version 1.02
LCB

KEY TO SYMBOLS
Below are the symbols used in the manual to draw the reader's attention:
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: Laumas provides 1 year guarantee from the date of delivery note, against material defects or battery
manufacturing faults.
DISPOSAL
This symbol on the product or on the packaging indicates that:
-This is an electrical/electronic device that should be disposed of separately from the municipal solid waste via
designated collection facilities
-Improper use or disposal can be harmful to human health and the environment
-Non-compliance with these guidelines will be sanctioned according to the laws in force in the destination country
-It is recommended to dispose of packaging in accordance with local regulations

TABLE OF CONTENTS
USER WARNINGS................................................................................................................. 1
RECOMMENDATIONS FOR CORRECT INSTALLATION OF WEIGHING INSTRUMENTS. 2
RECOMMENDATIONS FOR CORRECT INSTALLATION OF THE LOAD CELLS ............... 2
LOAD CELL TESTING............................................................................................................. 5
MAIN SPECIFICATIONS OF THE INSTRUMENT.................................................................. 6
PARTS IDENTIFICATION ........................................................................................................ 6
TECHNICAL SPECIFICATIONS ............................................................................................ 7
ELECTRICAL CONNECTIONS.............................................................................................. 8
LOAD CELL TERMINAL BLOCK ............................................................................................ 8
SERVICE CONNECTOR .......................................................................................................... 9
ETHERNET, CANOPEN, SERIAL INTERFACE AND ANALOG OUTPUT .......................................9
IO-LINK............................................................................................................................................10
COMMUNICATION INTERFACE CONNECTORS (BUS IN –BUS OUT) .............................. 11
SERIAL INTERFACE AND ANALOG OUTPUT ..............................................................................11
CANOPEN .......................................................................................................................................13
IO-LINK............................................................................................................................................14
ETHERNET......................................................................................................................................14
CONNECTION TO THE LOAD CELL .................................................................................. 15
DIRECT CONNECTION.......................................................................................................... 15
CONNECTION VIA CABLE.................................................................................................... 17

- 1 -
USER WARNINGS
RECOMMENDATIONS FOR THE PROPER USE OF WEIGHING INSTRUMENT
-Keep away from heat sources and direct sunlight
-Do not dip in water
-Do not spill liquid on the instrument (refer to the materials table)
-Do not use solvents to clean the instrument (refer to the materials table)
-Do not install in areas subject to explosion hazard
The following table shows the material of the instrument components exposed to external agents:
COMPONENT
MATERIAL
DETAILS
Cover
Stainless steel
AISI316
Base
Stainless steel
AISI316
Screws
Stainless steel
AISI316
Rectangular seal
Elastomer
EPDM
M12 connectors
Metal
Nickel-plated zinc alloy
Elastomer
Silicone
M12 connector counterparts
Metal
Nickel-plated zinc alloy
Elastomer
EPDM
Plastic
Nylon
Flying connector cap
Plastic
PA6.6
Light guides
Plastic
PC
Clamping nut
Stainless steel
AISI316
PG9 cap
Stainless steel
AISI316
PG9 O-Ring
Elastomer
NBR
PG7 cable gland
Plastic
PA6.6
PG7 O-Ring
Elastomer
NBR
Label
Plastic
Polyester

- 2 -
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
SIZING OF LOAD CELLS CAPACITY
For safety reasons, in case of static weighing, it is advisable to use the load cells at a maximum of
70-80% of its nominal capacity (assuming that the load is uniformly distributed over the entire
weighed structure); depending on the handling mode of the load to weigh, consider to further reduce
the % of load with respect to the nominal capacity (ex.: forklifts handling, bridge cranes, etc.).
In case of weighing with dynamic loads, the installer has to estimate the thrust speed, the
acceleration, the frequency, etc.
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.

- 3 -
CONNECTING SEVERAL CELLS IN PARALLEL
Connect several cells in parallel by using - if necessary - a watertight junction box with terminal box.
The cell connection extension cables must be shielded, led individually into their piping or conduit
and laid as far as possible from the power cables (in case of 4-wire connections, use cables with
4x1 mm2minimum cross-section).
PROTECTION OF THE CELL CABLE
Use water-proof sheaths and joints in order to protect the cables of the cells.
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.

- 4 -
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

- 5 -
LOAD CELL TESTING
Load cell resistance measurement (use a digital multimeter):
-Disconnect the load cells from the instrument and check that there is no moisture in the cell
junction box caused by condensation or water infiltration. If so, drain the system or replace it if
necessary.
-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).
-The insulation value between the shield and any other cell wire and between any other cell wire
and the body of the load cell must be higher than 20 Mohm.
Load cell voltage measurement (use a digital multimeter):
-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 3.3 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.

- 6 -
MAIN SPECIFICATIONS OF THE INSTRUMENT
Weight transmitter with 4-wire load cell input, AISI316 stainless steel box. 6 status LEDs.
Micro USB-B connector for PC connection.
The instrument is available in different versions, depending on the communication interface:
RS485 serial port (for connection to: PC/PLC up to 32 instruments, max 99 with line repeaters, by
ASCII Laumas or ModBus R.T.U. protocol, remote display, printer), 16 bit analog output (tension or
current), Profibus DP, CANopen, Profinet IO, Ethernet/IP, Modbus TCP, SERCOS III, PowerLink,
EtherCAT, CC-Link, IO-Link.
The instrument is managed and configured via PC through the LCB Manager software,
or remotely via serial protocol or fieldbus; for specific information, refer to the LCB
Manager and Communication protocols manuals respectively.
PARTS IDENTIFICATION
1. BUS IN/BUS OUT: M12 connectors
specific for the communication
interface; the corresponding flying
connectors with solder terminals
are supplied.
2. SERVICE: M12 connector
dedicated to the instrument power
supply and to the digital outputs
and inputs connection; the
corresponding flying connector with
solder terminals is supplied.
3. L1÷L6: Status LEDs of the
communication interface.
4. PG9 cap with hexagonal head.
5. Hole for USB input.
6. Hole for load cell input.
7. M4 holes suitable for any fixings.

- 7 -
TECHNICAL SPECIFICATIONS
POWER SUPPLY and CONSUMPTION
12/24 VDC ±10%; 5 W
No. OF LOAD CELLS IN PARALLEL and SUPPLY
max 4 (350 ohm); 3.3 VDC / 40 mA
LINEARITY / ANALOG OUTPUT LINEARITY
< 0.01% F.S.; < 0.01% F.S.
THERMAL DRIFT / ANALOG OUTPUT THERMAL DRIFT
< 0.0005% F.S./°C; < 0.003% F.S./°C
A/D CONVERTER
A/D CONVERTER
MAX DIVISIONS
(with measurement range ±6 mV = sens. 2 mV/V)
±999999; 6.6 nV/d
MEASUREMENT RANGE
±26 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
10 levels / 5÷600 Hz
RELAY OUTPUTS
3 - max 115 VAC; 150 mA
24 VDC; 200 mA
DIGITAL INPUTS
2 - 5÷24 VDC PNP
MICRO USB PORT
type B –USB 2.0 (full speed)
HUMIDITY (non condensing)
85%
PROTECTION RATING
IP67
STORAGE TEMPERATURE
-30°C +80°C
WORKING TEMPERATURE
-20°C +50°C
DIMENSIONS
97x38x82 mm (including flying connectors)

- 8 -
ELECTRICAL CONNECTIONS
LOAD CELL TERMINAL BLOCK
WARNING: before carrying out the load cell wiring, make sure the instrument is not
powered.
SIG+
+LOAD CELL SIGNAL
SIG-
-LOAD CELL SIGNAL
EX-
-LOAD CELL EXCITATION
EX+
+LOAD CELL EXCITATION
-It is possible to supply up to four 350 ohm load
cells, or eight 700 ohm load cells.
-For 6-wire load cells make a jumper between EX-
and REF- and between EX+ and REF+
SIG+
SIG-
EX-
EX+
INSTRUMENT
4-WIRE LOAD CELL CONNECTION
LOAD CELLS

- 9 -
SERVICE CONNECTOR
ETHERNET, CANOPEN, SERIAL INTERFACE AND ANALOG OUTPUT
Instrument model
LCBRS485 - LCBRS485ANA - LCBCANOPEN -
LCBETHERCAT - LCBETHEIP - LCBMODBUSTCP -
LCBPOWERLINK - LCBPROFINETIO - LCBSERCOIII
Male M12,
8 pin, A-coded
1
+SUPPLY (12/24 VDC)
2
-SUPPLY (GND)/INPUT COMMON
3
INPUT No. 1
4
INPUT No. 2
5
OUTPUT COMMON
6
OUTPUT No. 1
7
OUTPUT No. 2
8
OUTPUT No. 3
-It is recommended to ground the power supply
negative pole.
1
2
3
4
5
6
7
8
INSTRUMENT
OUTPUTS
max 115 VAC 150 mA
INPUTS
supply 5÷24 VDC
12/24 VDC SUPPLY
+
-
+

- 10 -
IO-LINK
Instrument model
LCBIOLINK
Male M12,
8 pin, A-coded
1
24 VDC OUT
2
GND/INPUT COMMON
3
INPUT No. 1
4
INPUT No. 2
5
OUTPUT COMMON
6
OUTPUT No. 1
7
OUTPUT No. 2
8
OUTPUT No. 3
In the LCBIOLINK model, the power supply is
provided only through the interface connector used
(see section COMMUNICATION INTERFACE
CONNECTORS (BUS IN –BUS OUT); when the
IO-Link cable is connected to the instrument, the
24 VDC voltage is also present on the 24 VDC OUT
contact of the SERVICE connector and can be
used to drive inputs and outputs.
The maximum output current is 100 mA.
1
2
3
4
5
6
7
8
INSTRUMENT
OUTPUTS
max 115 VAC 150 mA
INPUTS
supply 5÷24 VDC
24 VDC OUT
(max 100 mA)
+
-
+

- 11 -
COMMUNICATION INTERFACE CONNECTORS (BUS IN –BUS OUT)
The BUS IN and BUS OUT connectors are specific for the different communication
interfaces.
SERIAL INTERFACE AND ANALOG OUTPUT
Instrument model
LCBRS485 - LCBRS485ANA
Baud rate (kb/s)
2400, 4800, 9600, 19200, 38400, 115200
Current output
0÷20 mA; 4÷20 mA (max 400 ohm)
Voltage output
0÷10 V; 0÷5 V (min 2 kohm)
Current output and voltage output are available only for LCBRS485ANA and cannot be
used simultaneously.
BUS IN –male M12 connector, 5 pin, A-coded
1
RS485: +
2
RS485: -
3
4
5
GND
BUS OUT –female M12 connector, 5 pin, A-coded
1
RS485: -
2
RS485: +
3
CURRENT OUTPUT
4
VOLTAGE OUTPUT
5
GND/ANALOG OUTPUT COMMON

- 12 -
RS485 SERIAL COMMUNICATION
If the RS485 network exceeds 100 metres in length or baud-rate over 9600 are
used, two terminating resistors are needed at the ends of the network. Two
120 ohm resistors must be connected between the “+” and “–” terminals of the
line, on the terminal strip of the furthest instruments. Should there be different
instruments or converters, refer to the specific manuals to determine whether it is
necessary to connect the above-mentioned resistors.
DIRECT CONNECTION BETWEEN RS485 AND RS232 WITHOUT CONVERTER
Since a two-wire RS485 output may be used directly on the RS-232 input of a PC or remote display,
it is possible to implement instrument connection to an RS-232 port in the following manner:
INSTRUMENT
RS232
RS485 –
→
RXD
RS485 +
→
GND
This type of connection allows A SINGLE instrument to be used in a ONE WAY
mode.
INSTRUMENT
RS485 +
RS485 -
max 500 m
RS485 +
3 2 5
PC RS232
RX+
RX-
TX-
TX+
CONVLAU
24 VDC
+
-
0
TX
RX
VIN RS485 +
RS485 -
RS485 -
RS485 +
RS485 -
RS485 +
RS485 -
GND GND GND
INSTRUMENT INSTRUMENT

- 13 -
CURRENT OUTPUT AND VOLTAGE OUTPUT CONNECTION
All analog outputs of the instrument are ACTIVE and SINGLE ENDED type, therefore they can be
connected only to PASSIVE receiver devices. The minimum load allowed for voltage outputs is
2 kohm, the maximum load allowed for current outputs is 400 ohm.
CANOPEN
Instrument model
LCBCANOPEN
Baud rate (kb/s)
10, 20, 50, 125, 250, 500, 800, 1000
Node ID
1÷127
BUS IN –male M12 connector, 5 pin, A-coded
1
2
CAN SHLD
3
CAN H
4
CAN GND
5
CAN L
BUS OUT –female M12 connector, 5 pin, A-coded
1
CAN SHLD
2
3
CAN GND
4
CAN H
5
CAN L
ACTIVE
ANALOG
OUTPUT
PASSIVE
RECEIVER
Voltage or current analog signal
-COMMON

- 14 -
IO-LINK
Instrument model
LCBIOLINK
BUS IN –male M12 connector, 4 pin, A-coded
1
L+
2
3
L-
4
C/Q
BUS OUT –male M12 connector, 4 pin, A-coded
1
L+
2
3
L-
4
C/Q
The IO-Link protocol uses point-to-point network connections between gateway and
device; use only one communication interface connector (BUS IN or BUS OUT).
ETHERNET
Instrument model
LCBETHERCAT - LCBETHEIP - LCBMODBUSTCP
LCBPOWERLINK - LCBPROFINETIO - LCBSERCOIII
Port
2x RJ45 10Base-T o 100Base-TX (auto-detect)
BUS IN –female M12 connector, 4 pin, D-coded
1
TD+
2
RD+
3
TD-
4
RD-
BUS OUT –female M12 connector, 4 pin, D-coded
1
TD+
2
RD+
3
TD-
4
RD-
Note: meaning of the signals in accordance with the ANSI/TIA-568 standard.

- 15 -
CONNECTION TO THE LOAD CELL
DIRECT CONNECTION
-Cut the load cell cable approximately
90 mm from the cable gland;
-strip the cable for about 45 mm;
-roll up the shielding braid until a wire is
obtained;
-electrically isolate the metal elements
in the cable to avoid short circuits
inside the instrument;
-strip the wires end;
-while holding the cable in place, screw
the cell nut up to the stop (max ½ turn);
-screw the supplied LCB nut onto the
load cell cable gland;
-wrap the Teflon tape around the thread
of the load cell cable gland;
-remove the instrument cover;
-screw the instrument onto the load cell
cable gland;
45 mm
90 mm
CELL NUT
LCB NUT

- 16 -
-lock the instrument by tightening the
LCB nut with the supplied wrench;
-wire the instrument terminal block and
connect the cable shield to EX- (see
section ELECTRICAL CONNECTIONS);
-replace the instrument cover and
tighten the four screws.

- 17 -
CONNECTION VIA CABLE
-Remove the instrument cover;
-screw the PG7 cable gland with O-ring
into the cell hole in order to make a seal
-loosen the head of the PG7 cable gland;
-insert the load cell cable into the
instrument by passing through the PG7
cable gland;
-strip the cable for about 45 mm;
-roll up the shielding braid until a wire is
obtained;
-electrically isolate the metal elements
in the cable to avoid short circuits
inside the instrument;
-strip the wires end;
-wire the instrument terminal block and
connect the cable shield to EX- (see
section ELECTRICAL CONNECTIONS);
-replace the instrument cover;
-gently pull the cable outwards to recover
the excess;
-tighten the four screws of the cover and
tighten the head of the PG7 cable gland.