BAYKON TX12 Manual de usuario

TX12

Weight Transmitter

Technical Manual

Rev 1.1

AFETY

NSTRUCTIONS

CAUTION! READ THIS MANUAL BEFORE OPERATING OR SERVICING THIS E UIPMENT. FOLLOW THESE

INSTRUCTIONS CAREFULLY. SAVE THIS MANUAL FOR FUTURE REFERENCE. DO NOT ALLOW

UNTRAINED PERSONNEL TO OPERATE, CLEAN, INSPECT, MAINTAIN, SERVICE, OR TAMPER WITH THIS

E UIPMENT. ALWAYS DISCONNECT THIS E UIPMENT FROM THE POWER SOURCE BEFORE CLEANING

OR PERFORMING MAINTENANCE. CALL BAYKON ENGINEERING FOR PARTS, INFORMATION, AND

SERVICE.

WARNING! ONLY PERMIT UALIFIED PERSONNEL TO SERVICE THIS E UIPMENT. EXERCISE CARE

WHEN MAKING CHECKS, TESTS AND ADJUSTMENTS THAT MUST BE MADE WITH POWER ON. FAILING

TO OBSERVE THESE PRECAUTIONS CAN RESULT IN BODILY HARM.

WARNING! FOR CONTINUED PROTECTION AGAINST SHOCK HAZARD CONNECT TO PROPERLY

GROUNDED OUTLET ONLY. DO NOT REMOVE THE GROUND PRONG.

WARNING! DISCONNECT ALL POWER TO THIS UNIT BEFORE REMOVING ANY CONNECTION, OPENING

THE ENCLOSURE OR SERVICING.

WARNING! BEFORE CONNECTING/DISCONNECTING ANY INTERNAL ELECTRONIC COMPONENTS OR

INTERCONNECTING WIRING BETWEEN ELECTRONIC E UIPMENT ALWAYS REMOVE POWER AND WAIT

AT LEAST THIRTY (30) SECONDS BEFORE ANY CONNECTIONS OR DISCONNECTIONS ARE MADE.

FAILURE TO OBSERVE THESE PRECAUTIONS COULD RESULT IN DAMAGE TO OR DESTRUCTION OF THE

E UIPMENT OR BODILY HARM.

CAUTION! OBSERVE PRECAUTIONS FOR HANDLING ELECTROSTATIC SENSITIVE DEVICES.

RIGHTS AND LIABILITIES

No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any

means, mechanical, photocopying, recording, or otherwise, without the prior written permission of BAYKON A.S.

No patent liability is assumed with respect to the use of the information contained herein. While every precaution

has been taken in the preparation of this book, BAYKON assumes no responsibility for errors or omissions. Neither

is any liability assumed for damages resulting from the use of the information contained herein.

The information herein is believed to be both accurate and reliable. BAYKON, however, would be obliged to be

informed if any errors occur. BAYKON cannot accept any liability for direct or indirect damages resulting from the

use of this manual.

BAYKON reserves the right to revise this manual and alter its content without notification at any time.

Neither BAYKON nor its affiliates shall be liable to the purchaser of this product or third parties for damages,

losses, costs, or expenses incurred by purchaser or third parties as a result of: accident, misuse, or abuse of this

product or unauthorized modifications, repairs, or alterations to this product, or failure to strictly comply with

BAYKON operating and maintenance instructions.

BAYKON shall not be liable against any damages or problems arising from the use of any options or any

consumable products other than those designated as Original BAYKON Products.

NOTICE: The contents of this manual are subject to change without notice.

BAYKON A.Ş.

Kimya Sanayicileri Organize SB Organik Cad. No:31 Tepeören, 34956 İstanbul, TURKEY

Tel : +90 216 593 26 30 (pbx) Fax : +90 216 593 26 38 http://www.baykon.com

1. F

RONT

IEW

EATURES AND

PECIFICATIONS

Microcontroller based analog load cell transmitter TX12 has very high accuracy and long

term stability with its high tech design. Its high performance electronic calibration via

RS232C serial port without any test weight and fast calibration without measuring output

signal give big advantage to the users for calibration scales.

This high tech instrument gives the system designers a lot of advantages to increase the

system reliability and to reduce the installation and service times. Besides the traditional

analog output adjustment with any test weight, the electronic calibration eCal and fast

calibration with 20% Max. test load reduces the calibration time. All instruments’ analog

outputs are matched in the production to perform calibration at PLC and for changing the

instrument without recalibration in service.

There are 8 positioned rotary switches and annunciator LED’s in front of the instrument.

The front view and pin descriptions of TX12 is shown below.

Pin Name

Defini ion

LOAD CELL CONNECTION

- Ex - Excitation

+ Ex + Excitation

- Si - Signal

+ Si + Signal

ANALOGUE OUTPUT

Current output

V Voltage output

G GND

Shield and Protective ground

SERIAL CONNECTION

TX TXD ( RS232C )

RX RXD ( RS232C )

G Ground ( RS232C )

SETPOINT CONNECTION

O1 Digital output 1

O2 Digital output 2

Com Digital outputs common

POWER SUPPLY

24V +24VDC

0V 0VDC

Meanings of rotary switchs’ positions are;

Programming (Prog) switch V Voltage output type run

(refer to page 7)

Current output type run

(refer to page 7)

Setpoint 1 adjustment

(refer to page 11)

S2 Setpoint 2 adjustment

(refer to page 11)

Z Zero adjustment

(refer to page 8)

G Gain adjustment with test weight

(refer to page 8)

ZF Fast zero adjustment

(refer to page 9)

Fast gain adjustment with 20% test

weight of Maximum scale capacity

(refer to page 10)

Adjustment (Adj) switch 0 Operation ( Run )

OK in set-up

Others

Set-up and adjustment. Refer to table in step 7

LED’s

Annunciator LED’s ( Run, Output

type

, Error ).

Refer to Section 5

Fea ures

•Minimized zero and span drifts because of its microcontroller technology and high

accurate, very low temperature drift 24 bits ADC and 16 bits DAC converters.

•Long time stability and low temperature drifts eliminates the frequent readjustment

period.

•Very easy and user friendly digital adjustment via rotary switches located on the front

of the instrument.

•Programmable digital adaptive anti-vibration filter to minimize environmental

vibrations.

•eCal electronic calibration without weights and digital filter adjustment via RS232C

port and xFace PC software.

•Fast calibration feature to reduce the adjustment time and to minimize adjustment

error.

•Calibration at PLC does not require readjustment after changing instrument because

of matching in the production.

•2 pcs free relay contact output for alarm or controlling valves, gate etc.

TECHNICAL SPECIFICATIONS

Analogue input range 0 mV to 20 mV

Min. input range < 1 mV

Linearity < % 0.01

Temperature drift < 0.007 % FSR / ºC

Converters

24 bit Delta-Sigma ratiometric ADC with integral analog and

digital filters

16 bit very low drift DAC

Internal resolutions 16 000 000 counts ADC

External resolution Analogue output changes up to 65000 steps

Calibration

With rotary switches in the front with any test load.

Fast calibration with 20% Max.

Electronic calibration via PC.

Preadjusted instrument for calibration at PLC

Digital Filter Programmable 3 step adjustable digital adaptive filter.

Analogue outputs Current output for 0-20 mA and 4-20 mA or

voltage output for 0 – 5 V and 0-10 V.

Max. cable length 300 meter

Max. load resistance

(current output) 500 Ω

Set point 2 pcs free programmable setpoints.

Digital Output 2 relay contacts for setpoints, 230 VAC or 30 VDC, 1 A.

Load cell excitation 5 VDC

Number of Load Cells Up to 4 units of 350 Ω or 12 units of 1100 Ω (min. 85 Ω)

Power supply 12 to 28 VDC 0.2 A

Operation Temperature Between -10°C and +45°C at 85% RH max, non-condensing

EMC Immunity Class E2

Enclosure Polyamide, for DIN-rail mount, IP20

Dimensions Front Width:22,5 mm, Front Length: 99 mm , Height:114,5mm

2. I

NSTALLATION AND

OMMISSIONING

Recommenda ions

Warning: Please care the following warnings for designing the control cabinet which will

increase your system reliability.

The control cabinet should be designed so that instrument can operate safely. The panel

should be placed clean area, not getting direct sun light if possible, with a temperature

between -10 ºC and +40 ºC, humidity not exceeding 85% non-condensing. All external

cables should be installed safely to avoid mechanical damages.

TX12 instruments are very low level signal measuring instruments. To avoid electrical noise,

TX12 should be separated from the equipments that produce electrical noise. Preferable use

metal cabinet against radio frequency interference and the cabinet shall be connected to

ground against the electromagnetic disturbances. Load cell cable and analog output cable

trays must be separated from others, if possible. If there are noise-generating equipments

such as heavy load switches, motor control equipments, inductive loads etc., please be

careful against the EMC interference in the cabinet. Connect parallel reverse diodes to the

DC inductive loads like relays, solenoids etc. to minimize voltage peaks on the DC power

lines.

All load cell and analogue output cables coming to the control cabinet shall be shielded.

Warning: Control cabinet design and proper installation increases reliability and

performance of the instrument. Please do not forget that the instrument must be powered off

before inserting or removing any peripheral connector.

Follow the installation and commissioning steps described below carefully to prevent

unwanted results after installation.

S ep 1 Mechanical Ins alla ion

The place where you will use/install your instrument should be clean, not getting direct

sunlight if possible, with a temperature between -10ºC and +40ºC, 85% maximum relative

humidity non-condensing. Install the instrument on the DIN rail in the cabinet. The

instrument mechanical drawing is;

S ep 2 Load Cell Connec ion

The load cell wiring should be made carefully before energizing to avoid damages to the

instrument and load cells. The input resistance of the load cells that you want to connect

should be more than 85 Ω.

Pin Name

Load Cell Cable

+Ex

+ Excitation

Excitation

+Si

+ Signal

Signal

Shield

S ep 3 Analogue Ou pu Connec ion

Only one of the analog output types can be used at the same time and has to be selected in

the setup type. Install the analog output measuring instrument for adjustment, if need be.

Pin Name Defini ion

Current Output

V Voltage Output

G GND

Shield

Current output connection

Voltage output connection

S ep 4 Changing he Analogue Ou pu

TX12 sets its analog output according to the table below at power on. Turn the programming

switch and connect TXD and RXD pins as indicated in the table below before power on

the instrument to set analog output type and its signal level.

Analogue

Ou pu Range Prog. Swi ch Posi ion TXD & RXD pins V/

LED

4 - 20 mA

Open circuited On

0 - 20 mA Short circuited Off

0 - 10 VDC

Open circuited Flash

0 - 5 VDC Short circuited Blinking

You can also set the Analog output type after power on as;

- Turn the programming switch to the analog output type ( to V or

position )

- Connect or disconnect TXD and RXD pins according the table above to set the

output range.

- Turn the adjustment switch to the position. After 2 seconds turn in to the

“ 0 “ position back ( if the instrument is powered on before ).

The analogue output type can be followed by the V/

LED on front of the instrument after

running it ( refer to table above ) .

After set up the instrument’s analog output according to the table above go to the next step.

S ep 5 Energize he Ins rumen

Check last time the followings before energizing the instrument.

- Check Mechanical installation, grounding, load cell connection and power

supply connection.

- Check the analogue output set up described in step 4.

- The analogue output cabling should be done for the same analogue output

type.

- The adjustment (Adj) rotary switch shall be at “ 0 “ position.

If everything is correct energize the instrument.

S ep 6 Zero and Gain Adjus men s

By Changing ou pu value wi h ro ary swi ch:

To start the adjustment the programming switch should be at analog output type position, V

. Z and G positions of the programming switch are used for performing zero and gain

adjustments in sequence. Analog output is changed by turning the adjustment switch as

described in the table below.

Adjus men ro ary

swi ch posi ion Ro ary swi ch descrip ion Run LED

Do not change, operation On

Decrease ( - ) / Increase ( + ) in slow steps Flash

Decrease ( - ) / Increase ( + ) in medium steps Flash

Decrease ( - ) / Increase ( + ) in big steps Flash

RUN LED flashes to indicate the instrument is not in operation.

Zero Adjus men

- Connect the measurement instrument to the analog output.

- Unload the scale.

- Turn the programming switch to the Z position from the analog output type

position.

- Increase or decrease the analog output by adjustment rotary switch. Never

bring the adjustment switch position to position in this adjustment. The

adjustment switch will be at “ 0 ” position at the end of the adjustment.

- Turn the programming switch to analog output type position ( V or

position )

to start the operation or to the G position to start gain adjustment.

Gain Adjus men

- Connect the measurement instrument to the analog output.

- Load the scale.

- Calculate the analog output value should be calculated for the applied load.

The analog output value at any loading is;

Analog Output

Minimum output

Maximum output

–

Minimum output

Load

Scale capacity

For example, for 100 kg scale capacity , 4 – 20 mA output range, and 25 kg

load, the analog output current will be ;

out

= 4 + (( 20 – 4 ) / 100 ) * Load = 4 + 0.16 * Load = 4 + 0.16 * 25 = 8 mA

The 0 – 10 VDC analog output voltage will be:

out

= 0 + (10 / 100 ) * 25 kg = 0,1 * 25 = 2.5 VDC

- Turn the adjustment switch to the G position from the analog output type

position you set before.

- Increase or decrease the analog output by adjustment rotary switch to the

calculated output value.

Never bring the adjustment switch position to position in this adjustment.

The adjustment switch will be at “ 0 ” position at the end of the adjustment.

- Turn the programming switch to analog output type position for operation ( to V

position ).

Important note: The instrument saves 4 different adjustments in its memory for the voltage

and current outputs and their ranges. Changing the analog output type automatically set the

adjustment before of that output range.

Fas adjus men o nominal ou pu range :

You may perform fast adjustment method if you will set zero and gain to analog output

nominal values. This feature gives advantage to the instrument for small and medium

capacity weighing systems’ fast and easy adjustment.

Fas Zero Adjus men :

- Unload the scale.

- Turn the programming switch to ZF position.

- Turn the Adj. switch to position and turn it back to “ 0 “ position 2

seconds later.

- Turn the programming switch to analog output type position to start operation

or to GF position for gain adjustment.

For example, for 4 – 20 mA range and for 100 kg capacity scale, unload the scale and

perform fast adjustment to set the output to 4 mA.

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