Sewhacnm SI 520 User manual

Digital Weighing Indicator
SI 520
User Manual
Ver. 1.10 2017.09.05

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SI 520 WEIGHING INDICATOR
CONTENTS
1. BEFORE INSTALLATION..........................................................................................- 4 -
2. INTRODUCTION.......................................................................................................- 5 -
2-1. Introduction ..........................................................................................................................................- 5 -
2-2. Cautions..................................................................................................................................................- 5 -
2-3. Features ..................................................................................................................................................- 5 -
3. SPECIFICATION ........................................................................................................- 6 -
3-1. specification..........................................................................................................................................- 6 -
3-2. Option .....................................................................................................................................................- 7 -
3-3. State LED................................................................................................................................................- 7 -
3-4. Real Panel ........................................................................................................................................... - 10 -
4. Installation............................................................................................................. - 11 -
4-1. External Dimension & Cutting Size......................................................................................... - 11 -
4-2. Installation Components.............................................................................................................. - 11 -
4-3. Load Cell Installation ..................................................................................................................... - 12 -
5. SET-UP.................................................................................................................... - 13 -
5-1. Test Weight Calibration Mode (Using Test Weight) ....................................................... - 13 -
5-2. Simulation Calibration Mode (Calibrate without Test Weight) .................................. - 17 -
5-3. F-FUNCTION Setting...................................................................................................................... - 21 -
5-4. Test Mode........................................................................................................................................... - 35 -
5-5. Test Mode Detail information ................................................................................................... - 36 -
6. INTERFACE ............................................................................................................. - 38 -
6-1. Serial Interface.................................................................................................................................. - 38 -
6-2. External input.................................................................................................................................... - 54 -
6-3. Relay output...................................................................................................................................... - 54 -

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SI 520 WEIGHING INDICATOR
6-4. Current loop ...................................................................................................................................... - 55 -
6-5. Analogue I-Output Interface (4~20mA)................................................................................ - 56 -
6-6. Analog V-Output Interface (0~10V) ....................................................................................... - 57 -
6-7. Analog output selection............................................................................................................... - 58 -
6-8. Print Interface.................................................................................................................................... - 58 -
6-9. BCD IN card (Changing Product number) ........................................................................... - 60 -
6-10 BCD OUT Card (Weight data out).......................................................................................... - 61 -
6-11. Ethernet card .................................................................................................................................. - 62 -
6-12. SD memory card ........................................................................................................................... - 62 -
6-13. Option card combination.......................................................................................................... - 63 -
7. Error & Treatment................................................................................................ - 64 -
7-1. Load Cell Installation ..................................................................................................................... - 64 -
7-2. ERROR code....................................................................................................................................... - 64 -
7-3. Indicator Error & Treatment....................................................................................................... - 65 -

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SI 520 WEIGHING INDICATOR
1. BEFORE INSTALLATION
Caution / Warning Marks
Copy Rights
1. All Right and Authority for this manual is belonged to SEWHA CNM CO., LTD.
2. Any kinds of copy or distribution without permission of SEWHA CNM CO.,LTD will be
prohibited.
3. This manual may be changed as the version is upgraded, without previous notice.
Inquiries
If you have any kinds of inquiries for this model, please contact your local agent or Head office.
Head Office : SEWHACNM CO.,LTD
Website : http://www.sewhacnm.co.kr
E-mail : [e-mail]
TEL : [phone]
This mark warns the possibility to arrive death or serious injury
in case of wrongly used.
This mark cautions the possibility to arrive serious human body
injury or product lose in case of wrongly used.

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SI 520 WEIGHING INDICATOR
2. INTRODUCTION
2-1. Introduction
Thank you for your choice of this "SI520" Industrial Digital Weighing Indicator.
This "SI520" model is high-performance weighing indicator.
We support Serial communication, ETHENET, BCN IN/OUT, Analog out, SD MEMORY CARD.
Please review and learn this instruction Manual and enjoy your process efficiency with
"SI510" Weighing Indicator.
2-2. Cautions
1. Don't drop on the ground and avoid serious external damage on item.
2. Don't install under sunshine or heavy vibrated condition.
3. Don't install place where high voltage or heavy electric noise condition.
4. When you connect with other devices, please turn off the power of item.
5. Avoid from water damage.
6. For the improvement of function or performance, we can change item specification without
previous notice or permission
7. Item's performance will be up-dated continuously base on previous version's performance.
2-3. Features
1. SI520 model is standard size indicator which is easy to install on the panel.
2. Front panel is covered with polycarbonate film, strong against dust and water.
3. RS232C serial interface is standard installed.
4. User can choose various options ; Analog output 4~20mA, 0~10V / RS232C / RS422,
RS485 / ETHERNET CARD / BCD OUT /
BIN IN / SD memory card (additional option)

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SI 520 WEIGHING INDICATOR
3. SPECIFICATION
3-1. specification
Content
Specification
Analog Part
Display Resolution
1/20,000
Internal Resolution
1/2,000,000 (±1,000,000)
Input sensitivity
Min 0.1µV/V
Max signal input voltage
Max 3.0mV/V
Load cell excitation
DC +5V
A/D conversion method
Sigma-Delta
Decimal point
0, 0.0, 0.00, 0.000
Drift
Offset
10PPM/℃
Span
10PPM/℃
Non Linearity
0.001% of Full Scale
Analogue sampling (sec)
60times / sec(MAX)
Environment
Operating Temperature
Range
-10℃ ~ +40℃ [14℉ ~ 104℉]
Operation Humidity Range
40% ~ 85% RH, Non-condensing
Function
Calibration Mode
Test Weight Calibration Mode
Simulation Calibration Mode
Display
-Main weight : 6DIGIT number
20.36mm(0.8inch) Red/Green DUAL FND
-Sub weight and setting value : 15 X 2
DIGIT Numbers 9mm(0.36inch) Green FND
-State alarm : 16digit Red/Green DUAL LED
Key Pad
15pcs Standard Key pad
Additional Digital Input
6pcs external input key
Communication
Serial Port 1
(RS-232)
Data Transference
Command Mode
Serial Printer Mode
Modbus (RTU)
Reply Output
Reply output
7pcs selectable relay output
Power
AC : 110~240V, Maximum Power Consumption 19W
Size
200mm(W)ⅹ100mm(H)ⅹ126.5mm(D)
Weight : 1230g

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SI 520 WEIGHING INDICATOR
3-2. Option
Option 1
Serial Port (RS-422)
Option 2
Serial Port (RS-485)
Option 3
Serial Port (RS-232)
Option 4
ETHERNET CARD
Option 5
Analog Output(4~20mA)
Option 6
Analog Output(0~10V)
Option 7
BCD OUT
Option 8
BIN IN
Option 9
SD Memory Card
3-3. State LED
LED
STATE
STEADY
When the weight is stable, ON.
ZERO
When the current weight is zero, ON.
TARE
When the “TARE”function is set, ON.
RUN
When the machine works, the lamp become ON
TxD
When indicator sends date out through serial communication.
RxD
When indicator receives date out through serial communication.
PRT
When the weighing data is printed, ON.
OUT1
When OUT1 (Relay) is operated, ON.
OUT2
When OUT2 (Relay) is operated, ON.
OUT3
When OUT3 (Relay) is operated, ON.
OUT4
When OUT4 (Relay) is operated, ON.
OUT5
When OUT5 (Relay) is operated, ON.
OUT6
When OUT6 (Relay) is operated, ON.
OUT7
When OUT7 (Relay) is operated, ON.
kg
Displayed weight unit under Function 103-00
g
Displayed weight unit under Function 103-01
t
Displayed weight unit under Function 103-02
pcs
Displayed weight unit under Function 103-03
oz
Displayed weight unit under Function 103-04
lb
Displayed weight unit under Function 103-05

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SI 520 WEIGHING INDICATOR
3-3-1. Key Operation
- Press 4 times within 3secs, to enter to Function setting mode.
- Press 4 times within 3secs, to enter to “Hidden function”mode.
- Make the Weight Value to Zero
- Number 1
- Set the Tare Function
- Number 2
- Start to Weighing
- Number 3
- Produce number setting
- Number 4
- Use for setting value
- Number 5
- Use for stop
- Number 6
- Use for DRIB setting
- Number 7
- Use for FREE FALL setting
- Number 8
- Use for Unit WT Setting.
- Number 9
- Use for Print out
- Number 0
- Cancel or Move to Previous Step.
- Save and Move to Next Step.

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SI 520 WEIGHING INDICATOR
3-3-2. Combination Key
Use for tare value setting
Use for over tare weight setting
Use for under tare weight setting
Use for compulsory finish
Real over weight
Real under weight
Subtotal weight Print
Delete subtotal P/N's accumulated weighing count and weight
P/N's Total weight print
Unit Weight Calibration
Delete all P/N's accumulated weighing count and weight
Print all the total weight
Delete all P/N's total weight
Max accumulated weighing count : 999,999times
Over 999,999times return to “0” time
Max accumulated weight display : 999999999 (g, kg, ton)
Over 999,999,999 (g, kg, ton) return to “0” (g, kg, ton)

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SI 520 WEIGHING INDICATOR
3-4. Real Panel
(1) AC Power input terminal
(2) External input terminal: User selectable 6EA
(3) Serial Interface terminal
Terminal
RxD
TxD
GND
C/L
C/L
RS –232
Rx
Tx
GND
C/L
C/L
(4) Loadcell Input terminal
Terminal
EXC+
EXC-
SIG+
SIG-
SHLD
Loadcell
EXC+
EXC-
SIG+
SIG-
SHEILD
(5) Relay output terminal: User selectable 7EA (Function 141~147), COM is common.
Terminal
O1
O2
O3
O4
O5
O6
O7
OC
Relay
output
RELAY 1
RELAY 2
RELAY 3
RELAY 4
RELAY 5
RELAY 6
RELAY 7
RELAY
COM
(6) Analog output terminal
Terminal
-
+
Remark
4~20mA
(-)
(+)
Option
0~10V
(-)
(+)
Option
(7) Option serial interface terminal
Terminal
1
2
3
4
Remark
RS –232C
GND
GND
Rx
Tx
Option
RS - 422
TxD-
TxD+
RxD-
RxD+
Option
RS - 485
Unused
Unused
D-
D+
Option
Please check the Comm. and other specification in the label, attached on the cover
plate first, and make connection according to that information.
(1)Power
(2)External Input
(3)Serial I/F
(4)Loadcell Input
(5)Relay output

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SI 520 WEIGHING INDICATOR
4. Installation
4-1. External Dimension & Cutting Size
4-2. Installation Components
SI 520 Main Body
User Manual

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SI 520 WEIGHING INDICATOR
4-3. Load Cell Installation
Load Cell Wire Connection (In case of SEWHACNM’s Load cell)
It depends on the manufacturer of load cell, please check the specification.
Under Set-up the Load cell, if EXC+ and EXC- have a short circuit,
It may cause damage in the indicator.(specially analogue board)
If you connect other wires to Load cell terminal wrongly, it may cause damage
in the analogue board.
Before connecting the load cell cable you have to power off and be sure to connect
the cable to the terminal correctly.
Do not weld near the load cells , Indicators or other devices.
■Load Cell Installation
1. You can connect Max 8pcs of same capacity Load cells at once. (350 Ω)
2. You have to make horizontal balance on the ground.
3. If you install more than 2pcs of load cells, use summing box and adjust output signal
difference as minimum. It can make wrong weighing process caused by each load cell's variation.
4. if there is some temperature difference around load cell, it can cause wrong weight
measurement.
5. Don't do welding job or arc discharge around installation place. But, there is no choice, Please
disconnect power cable and load cell cable.
6. If you measure static electricity material, please make earth between down part and up part
of load cell.

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SI 520 WEIGHING INDICATOR
5. SET-UP
5-1. Test Weight Calibration Mode (Using Test Weight)
5-1-1. Calibration Mode
Calibration is the process of adjusting weight balance between "Real Weight" on the Load Cell and
"Displayed weight of Indicator". When you replace Load Cell or Indicator, you have to do
Calibration process once again.
(When you enter the weight calibration mode, tare, hole, print function become initialize.)
Before start to the calibration mode,
Please turn on the indicator and preheat about 15 min.
Calibration Key
Key Button
Key Button
Key Button
Key Button
Test Weight
Calibration mode /
Setting decimal point
Simulation Calibration
Mode / Setting
Divition
Number 1
Number 6
Number 2
Number 7
Number 3
Number 8
Number 4
Number 9
Number 5
Number 0
Previous step
Enter

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SI 520 WEIGHING INDICATOR
If you want to set Max capacity as 1,000kg and the division is
0.1 (100g), then just input “1000”.
5-1-2. Test Weight Calibration Mode (Using Test Weight)
STEP 1
1) Remove "CAL-BOLT" on the real panel.
2) Press "CAL-LOCK S/W" inside.
STEP 2 –Setting "Capacity of weighing scale"
1) When "CALIBR" display.
2) Press "F1" key.
3) It will displaying "CAPA"
4) Input max capacity and press enter key.

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SI 520 WEIGHING INDICATOR
Max decimal point will be 0.0001, and digit can be selected among 1,2,5,10,20,50
Digit and decimal point must be fulfilled under the below condition.
ㅇㅇ
In this step, If there is unstable condition such as some forces or vibration on the
scale part, "Error-A" will be displayed, and "DEAD value" will not be calculated.
Please remove the cause of the force or vibration and process it again.
ㅇㅇ
STEP 3 –Decimal point and division setting
1) After "DIVI" is displayed, locate the
decimal point with "F1"key.
2) Set the division with "F2" key.
Press enter key to save.
STEP 4 –Measuring the "DEAD" Weight of Weighing Scale
1) When "DEAD" displays, Press Enter key.
2) The indicator will calculate dead weight of
scale part automatically. (While this process,
there should be nothing on the scale part.)
Indicator will search "DEAD weight" during
10secs automatically to find the best
condition.

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SI 520 WEIGHING INDICATOR
STEP 5 –Calculation Span Value
1) If the count is over, "SPAN" will be
displayed.
2) Input the weight of your "Test Weight" and
press "ENTER" key.
3) If "UP" is displayed, Please load "Test
Weight" on the scale part and press "ENTER"
key.
4) Calculate Span Value during 10~20 secs.
5) When "CALEND" is displayed and
calibration is completed.
6) After calculation, span value will be
displayed on the display. Then press Enter
key. It will become save.

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SI 520 WEIGHING INDICATOR
5-2. Simulation Calibration Mode (Calibrate without Test Weight)
With this "Simulation Calibration Mode" you can make simple calibration without any "TEST weight".
This calibration mode uses "Load cells max capacity" and "Max Output Rate (mV)", so the weight
adjustment degree might be less than " Test Weight Calibration". The guaranteed resolution of this
"Simulation Calibration" is 1/3,000.
STEP 1 –Start Simulation Calibration Mode
1) Remove "CAL-BOLT" on the back panel.
2) Press "CAL-LOCK S/W" inside.
STEP 2 -
1) When "CALIBR" is displayed, Press F2 key
and select "SCAL".
2) When "S.CAL" is displayed, Press "ENTER"
key.

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SI 520 WEIGHING INDICATOR
In case of multiple pieces of load cells are installed, please make sum of each load
cell's capacity and make setting with max capacity.
EX) There are 4pcs of load cells and each load cell's max capacity is 1,000kg.
Then total max capacity will be 4,000kg (1,000 X 4) and you have to input 4,000.
STEP 3 –Setting "Capacity of Load Cell"
1) "CAPA" become displayed.
2) Check the Max Capacity of Load Cell and
Input the Max Capacity to Load cell. (Refer to
the load cell label or Test Report.) And Press
"ENTER" key.
STEP 4 –Setting "Digit / Division" value
1) After "DIVI" is displayed, locate the
decimal point with "F1"key.
2) Set the division with "F2" key.
Press enter key to save.

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SI 520 WEIGHING INDICATOR
STEP 5 –Measuring the “DEAD Weight”of Weighing Scale.
1) When "DEAD" displays, Press Enter key.
2) Then indicator will calculate dead weight of
scale part automatically. ( While this process,
there should be nothing on the scale part. )
STEP 6 –Inputting Max Output ( Rated Output Voltage / mV)
1) After "mV/V" is dispalyed, Check the rated
output value of load cell. (Refer to the load
cell label, or test report). and press enter key
to save and move to next step.
2) Input the load cell R.O value.
3) If input wrong value, there will display “Err-
01”, please go back to Setting “Capacity of
Load Cell”. After recheck the label of load cell
and retry the process.

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SI 520 WEIGHING INDICATOR
4) Calculated span value will be displayed,
Then press enter key to finish the calibration
step.
In case of multiple pieces of load cells are connected, the rated output will be same
as single load cell’s. (Because plural load cells are connected with parallel connection, the sum
of rated output voltage is same as single load cell’s rated output)
※Due to some variation between “State output rate” and “Real Output rate” of load cell,
there might be some weight difference after finishing calibration.
If you want to make more precise weighing process, please measure real output rate of load cell
and input the measured value. Then the weight measurement will be more precise than before.