AGRI TRONIX Brecknell SBI-521 Series User manual

SBI-521
Indicator Series
Service Manual
AWT35-500811 Issue AF January 2013

© Brecknell, LLC 2013. All rights reserved.
No part of this publication may be reproduced, stored in an electronic retrieval system, or transmitted in any form
or by any means, electronic, mechanical, photocopying, recording or otherwise without the prior written consent of
the copyright owner, or as permitted by law or under license. Full acknowledgment of the source must be given.
Brecknell is a registered trade mark of the Brecknell, LLC. This publication was correct at the time of going to print
however, Brecknell, LLC reserves the right to alter without notice the specification, design, price or conditions of
supply of any product or service at any time.
All third party brands and product names used within this document are trademarks or registered trademarks of
their respective holders.
SBI521_s_en_500811.book

SBI521 Service Manual 1
Table of Contents
Manual revision history ............................................................................................................................. 4
Chapter 1 General information and warnings ......................................................................................... 5
About this Manual ..............................................................................................................5
Text Conventions ........................................................................................................ 5
Special Messages ....................................................................................................... 5
Warnings ............................................................................................................................ 6
Installation .......................................................................................................................... 6
Charge the Battery ...................................................................................................... 6
Connections ....................................................................................................................... 7
Weigh Platform or Loadcell Connections .................................................................... 8
RS-232 Serial Port Connections ................................................................................. 9
RS-485 Serial Port Connections ............................................................................... 10
Power Supply Connections ....................................................................................... 10
Sockets and Jumpers ...................................................................................................... 11
Definition of Sockets and Jumpers ............................................................................ 11
Communication Jumpers ........................................................................................... 12
Routine Maintenance ....................................................................................................... 13
Sharp Objects ..................................................................................................................13
Cleaning the Indicator ...................................................................................................... 13
Chapter 2 Specifications ......................................................................................................................... 14
SBI-521 Series Models .................................................................................................... 14
Housing and Outline Dimension ...................................................................................... 14
Housing ..................................................................................................................... 14
Outline Dimension ..................................................................................................... 14
Power Supply ...................................................................................................................15
Display ............................................................................................................................. 15
Keypad ...................................................................................................................... 15
Environment ............................................................................................................. 15
Load Cell Excitation ................................................................................................... 15
Communication ................................................................................................................ 16
Analog Circuitry ................................................................................................................ 16
Capacity and Division ...................................................................................................... 16
Accuracy .......................................................................................................................... 16
Approvals ......................................................................................................................... 16
Calibration Method: .......................................................................................................... 16
Real Clock ........................................................................................................................ 17
Other Main Functions ....................................................................................................... 17
Chapter 3 Configuration .......................................................................................................................... 18
Front Panel ...................................................................................................................... 18
LED Version .............................................................................................................. 18
LCD Version .............................................................................................................. 19
Display ............................................................................................................................. 19
LED ........................................................................................................................... 19
LCD ........................................................................................................................... 20
Keyboard .......................................................................................................................... 21
Navigating the Weigh Mode ............................................................................................. 23
Change the Working Mode ........................................................................................ 23
Enter or Exit the HOLD Mode .................................................................................... 23
Zero ...........................................................................................................................23
Tare ...........................................................................................................................23
Preset Tare Weight ................................................................................................... 23
Clear Tare Weight ..................................................................................................... 23

2 SBI521 Service Manual
Output Data ............................................................................................................... 24
Display Gross or Net Weight ..................................................................................... 24
Change Weight Unit .................................................................................................. 24
Check Weight ............................................................................................................ 26
Navigating the Count Mode ............................................................................................. 26
Enter Count Mode ..................................................................................................... 27
Obtain Piece Weight .................................................................................................. 27
Check Counts (counts compare) in Counting mode: ................................................. 28
Percent Weigh Mode ....................................................................................................... 28
Enter Percent Weighing Mode .................................................................................. 28
Obtain Percentage Weight ........................................................................................ 29
Check Percent (percentage compare) in Percent Weighing Mode ........................... 30
Hold Function ................................................................................................................... 30
Activate the Hold Function ........................................................................................ 31
Access the Hold Mode .............................................................................................. 31
Hold Methods ............................................................................................................ 31
Hold Annunciators ..................................................................................................... 32
Data Compare Function ................................................................................................... 32
Enable Data Compare Function ................................................................................ 33
View Data Compare Function ................................................................................... 33
Accumulation ...................................................................................................................33
Enable Accumulation ................................................................................................. 34
Display and Set Time ....................................................................................................... 34
Display and Set Date ....................................................................................................... 35
Display Firmware Version ................................................................................................ 35
Display Interface Type of COM2 ...................................................................................... 36
Display Test ..................................................................................................................... 36
Keyboard and Buzzer Test .............................................................................................. 36
Serial Port1/2 (COM1/2) Receiving Test .......................................................................... 37
Serial Port1/2(COM1/2) Transmitting Test ....................................................................... 37
Chapter 4 Setup Mode ............................................................................................................................. 38
Entering the Setup Menu ................................................................................................. 38
Navigating the Setup Menu .............................................................................................. 38
Setup Menu Parameters .................................................................................................. 40
Config Menu .............................................................................................................. 40
User Menu ................................................................................................................. 44
Cal Menu ................................................................................................................... 52
Misc Menu ................................................................................................................. 53
Test Menu ................................................................................................................. 53
Exit the Setup Menu ......................................................................................................... 54
Chapter 5 Calibration .............................................................................................................................. 55
Calibration Mode .............................................................................................................. 55
Weight Fine-tune .............................................................................................................. 56
Display ADC Output Code ............................................................................................... 57
Display and Calibrate Power Voltage .............................................................................. 57
Chapter 6 Serial Communication ........................................................................................................... 59
Com Port 1 ....................................................................................................................... 59
Com Port 2 ....................................................................................................................... 59
Protocol ............................................................................................................................ 59
Transaction String ............................................................................................................ 59
Commands and response ................................................................................................ 61
Single ........................................................................................................................ 61
Multiple ...................................................................................................................... 63
CONFIG-AD.FROM=COM2 ...................................................................................... 64
Communication when USER-COM1/2-LAYOUT is set to 200S/200F: ...................... 65

SBI521 Service Manual 3
Chapter 7 Legal for Trade ....................................................................................................................... 68
Configuration/Calibration Switch ...................................................................................... 68
Audit Trail Parameters ..................................................................................................... 69
View Configuration Counter ...................................................................................... 69
View Calibration Counter ........................................................................................... 69
Chapter 8 Troubleshooting ..................................................................................................................... 70
Display Characters ........................................................................................................... 70
Display Symbols .............................................................................................................. 71
Error Messages and Troubleshooting .............................................................................. 72
Addendum 1: Quick Setup and Configuration ...................................................................................... 73
Configure the SBI-521 to a Floor Scale ........................................................................... 73
Setting the Capacity and Count by ............................................................................ 73
Loadcell Connection and Jumpers ............................................................................ 74
Addendum 2: SBI-521 Calibration .......................................................................................................... 76
Addendum 3: Drum Weigher Setup ....................................................................................................... 78

4 SBI521 Service Manual
Manual revision history
Current
Issue Date Created Details of Changes
AD November 2012 previous revision 1.3 done as a Word document. Issue AD has been converted to FrameMaker.
Legal for Trade chapter and addendum 1 and 2 were added.
AE January 2013 update menu tables with added parameters and LED font. Add Addendum 3 - Drum Weigher
Setup. Add more print formats.
AF January 2013 correct some errors.

SBI521 Service Manual 5
1 General information and warnings
1.1 About this Manual
This manual is divided into chapters by the chapter number and the large text at the top
of a page. Subsections are labeled as shown by the 1 and 1.1 headings shown above.
The names of the chapter and the next subsection level appear at the top of alternating
pages of the manual to remind you of where you are in the manual. The manual name
and page numbers appear at the bottom of the pages.
1.1.1 Text Conventions
The keys used to interface with the SBI-521 are located on the front panel of the
indicator. The keystrokes are shown in BOLD incased between brackets. (e.g. [ZERO])
Displayed messages appear in bold italic type and reflect the case of the displayed
message.
1.1.2 Special Messages
Examples of special messages you will see in this manual are defined below. The
signal words have specific meanings to alert you to additional information or the relative
level of hazard.
CAUTION!
This is a Caution symbol.
Cautions give information about procedures that, if not observed, could result
in damage to equipment or corruption to and loss of data.
ELECTRICAL WARNING!
THIS IS AN ELECTRICAL WARNING SYMBOL.
ELECTRICAL WARNINGS MEAN THAT FAILURE TO FOLLOW
SPECIFIC PRACTICES OR PROCEDURES MAY RESULT IN
ELECTROCUTION, ARC BURNS, EXPLOSIONS OR OTHER HAZARDS
THAT MAY CAUSE INJURY OR DEATH.
NOTE: This is a Note symbol. Notes give additional and important information, hints
and tips that help you to use your product.

6 SBI521 Service Manual
1.2 Warnings
lAvoid lengthy exposure to extreme heat or cold. Your scale works best when
operated at normal room temperature. Always allow the scale to acclimate to
a normal room temperature before use.
lAllow sufficient warm up time. Turn the scale on and wait for a few minutes if
possible. This will give the internal components a chance to stabilize before
weighing.
lThese electronic scales are precision instruments. Do not operate near an
in-use cell phone, radio, computer or other electronic device. These devices
emit RF and can cause unstable scale readings. If your scale ever performs
poorly, try moving the scale to a different room or location.
lAvoid using in heavy vibration and airflow conditions.
lRead the weight reading in short time after loading. The output signature of
load cell and electronic circuit may be little influenced after weighing for a
long time.
1.3 Installation
1. Unpack the indicator and all components from the shipping box.
2. Remove all back panel screws to expose the indicator main board.
3. Insert the loadcell cable through the loadcell strain relief gland.
4. Connect the loadcell cable to the indicator via the loadcell connector. Refer to
section 1.4.1 for connection details.
5. Connect all other cables be used. Refer to the respective sections for
connection details.
6. Place back panel on the rear of the indicator and fasten it with the back panel
screws.
1.3.1 Charge the Battery
If you have a Model SBI-521 LED or SBI-521 LCD, the battery may need to be charged.
1. Take the indicator to a power outlet located indoors.
2. Attach one end of the charger unit to the underside of the indicator and plug
the other end of the charger unit to the power outlet.
It will take approximately 12 hours to fully charge the 6 volt 2.8Ah battery.
DANGER: RISK OF ELECTRICAL SHOCK. BE SURE TO UPLUG THE
INDICATOR BEFORE REMOVING THE COVER OR OPENING THE UNIT.
REFER TO QUALIFIED SERVICE PERSONNEL FOR SERVICE.

SBI521 Service Manual 7
1.4 Connections
The rear cover of the stainless steel enclosure must first be removed to make the
appropriate connections to the weigh platform, printer, remote display and power
supply.
To gain access to the connectors, remove the rear panel screws on the back of the
indicator.
Figure 1.1 Back View of Indicator
CAUTION: Danger of explosion if battery is incorrectly replaced. Replace only
with the same or equivalent type recommended by the manufacturer. Dispose
of used batteries according to the manufacturer’s instructions.
ATTENTION: Il y a danger d'explosion s'il y a remplacement incorrect de la
batterie, remplacer uniquement avec une batterie du même type ou d'un type
équivalent recommandé par le constructeur. Mettre au rebut les batteries
usagées conformément aux instructions du fabricant.
Power
Com 1/2
Loadcell
Config/Cal Switch Seal
Power Com 1/2 Loadcell
with back cover without back cover

8 SBI521 Service Manual
Figure 1.2 Main Board
1.4.1 Weigh Platform or Loadcell Connections
Connect the loadcell cable to the loadcell connector on the main board. Connection
assignments for the loadcell connector are shown in Figure 1.3. Refer to Table 1.2 on
page 9 for loadcell jumper configuration.
Figure 1.3 Loadcell Connector
Table 1.1 Loadcell Connections
Board
Designaltion Description Pin Electrical Level
E+ + excitation 1 5±0.3 VDC (≤0.12A)
SE+ + sense 2 5±0.3 VDC
E- - excitation 3 0 VDC
SE- - sense 4 ≤0.5 VDC
S+ + signal 5 2.5±0.3 VDC
S- - signal 6 2.5±0.3 VDC
SFG ground/shield 7 N/A
1
7
E+
SE+
E-
SE-
S+
S-
SFG

SBI521 Service Manual 9
Loadcell Jumper
Set JP3 jumpers for either a 4-wire or 6-wire loadcell.
Table 1.2 Loadcell Jumper Connector(JP3)
1.4.2 RS-232 Serial Port Connections
The SBI-521 indicator comes standard with two full Bi-directional RS-232 serial ports
designed for connection to either a PC or a serial printer.
Connect the serial printer or computer to the RS-232 terminal on the main board.
Communication terminal connections are shown in Figure 1.4. Refer to Table 1.10 and
Table 1.11 on page 12 for COM2 jumpers..
Figure 1.4 RS-232 Connector
Table 1.3 RS-232 Port Connections
Connected Pins Function
4 wire loadcell is used
6 wire loadcell is used
Designation Description Pin Electrical Level
RX1 port 1 receive 1 -12 to +12 VDC
TX1 port 1 transmit 2 -12 to +12 VDC
GND ground/common 3 0 VDC
GND ground/common 4 0 VDC
RX2 port 2 receive 5 -12 to +12 VDC
TX2 port 2 transmit 6 -12 to +12 VDC
1
6TX2
RX2
GND
GND
TX1
RX1

10 SBI521 Service Manual
1.4.3 RS-485 Serial Port Connections
The SBI-521 indicator comes standard with one RS-485 network port designed for local
networks and multidrop communication links. Refer to Table 1.10 and Table 1.11 on
page 12 for COM2 jumpers.
Figure 1.5 RS-485 Connection
Table 1.4 RS-485 Port Connections
Table 1.5 Termination Resistor Jumper (JP4)
1.4.4 Power Supply Connections
The SBI-521 comes standard with an external AC to DC power adapter. Simply plug
the AC adapter into the indicator DC power jack and then plug into a standard wall
outlet.
Table 1.6 Adapter Power Input Connector (ADP)
Table 1.7 Battery Power Input Connector (BAT)
Designation Description Pin Electrical Level
A RS-485 signal A 1 0 - 5 VDC
B RS-485 signal B 2 0 - 5 VDC
GND ground/common 3 0 VDC
Connected Pins Function
1-2 RS485 terminal 120ohm resistor on board is disabled
2-3 RS485 terminal 120ohm resistor on board is enabled
1
GND
B
A
3
IMPORTANT: Make sure that the AC voltage appearing at the wall outlet
matches the input voltage marked on the AC adapter.
Pin Definition In/Out/Power Electrical Level
1 Adapter input voltage + Power input 12VDC (10.5-15VDC, ≥0.5A)
2 Adapter input voltage - (GND) Power ground 0Vdc
3 Shell Earth N/A N/A
Pin Definition In/Out/Power Electrical Level
1 Battery input voltage + Power input 5.6-7.2Vdc (6V/2.8AH lead acid battery)
2 Battery input voltage -(GND) Power ground 0Vdc

SBI521 Service Manual 11
1.5 Sockets and Jumpers
Figure 1.6 shows main board connectors for the loadcell, printer or computer, power
supply and battery..
Figure 1.6 SBI-521 Main Circuit Board
1.5.1 Definition of Sockets and Jumpers
Table 1.8 ADP - Adapter Power Input Connector
Table 1.9 Battery Power Input Connector
Pin # Definition In/Out/Power Electrical Level
1 Adapter input voltage + Power input 12Vdc(10.5-15Vdc, ≥0.5A)
2 Adapter input voltage - (GND) Power ground 0Vdc
3 Shell Earth
Pin # Definition In/Out/Power Electrical Level
1 Battery input voltage + Power input 5.6-7.2Vdc (6V/4.0AH lead acid battery)
2 Battery input voltage - (GND) Power ground 0Vdc

12 SBI521 Service Manual
1.5.2 Communication Jumpers
Jumpers on JP8.
RXD2 and TXD2 will need to be set to the desired configuration.
Table 1.10 JP8 Connector
Table 1.11 RXD2 and TXD2 Jumper Connectors
Connected Pins Function
COM2 is used as RS-232
COM2 is used as RS-485
COM2 is not used
COM2 is not used
Connected Pins
Function
TXD2 RXD2
COM2 is not used
COM2 is used as RS-232
COM2 is used RS-485

SBI521 Service Manual 13
1.6 Routine Maintenance
Always turn off the machine and isolate from the power supply before starting any
routine maintenance to avoid the possibility of electric shock.
1.7 Sharp Objects
Do not use sharp objects such as screwdrivers or long fingernails to operate the keys.
1.8 Cleaning the Indicator
IMPORTANT: This equipment must be routinely checked for proper operation
and calibration.
Application and usage will determine the frequency of calibration required for
safe operation.
Table 1.12 Cleaning DOs and DON’Ts
DO DO NOT
Wipe down the outside of standard products
with a clean cloth, moistened with water and
a small amount of mild detergent
Attempt to clean the inside of the indicator
Use harsh abrasives, solvents, scouring cleaners or
alkaline cleaning solutions
Spray the cloth when using a proprietary
cleaning fluid
Spray any liquid directly on to the display window

14 SBI521 Service Manual
2 Specifications
2.1 SBI-521 Series Models
2.2 Housing and Outline Dimension
2.2.1 Housing
IP65 wash-down stainless steel housing with rotary bracket.
2.2.2 Outline Dimension
lWith bracket: 10.31" x 8.46" x 3.45" (262mm x 215mm x 85mm)
lWithout bracket: 8.66" x 6.30" x 3.07" (220mm x 160mm x 78mm)
Figure 2.1 SBI-521Outline Drawing
Model Description
SBI-521 LED Version, 6V4.0AH lead-acid rechargeable battery is installed
SBI-521 LCD version, 6V4.0AH lead-acid rechargeable battery is installed

SBI521 Service Manual 15
2.3 Power Supply
l100 - 240 VAC, 50/60 Hz AC adapter
l6V 4.0AH lead-acid rechargeable battery
lBattery charging Circuit: built-in
2.4 Display
lSBI-521: 7-digits,7-segment, 0.7'' (17mm) ultra brightness LEDs with 16
annunciators
lSBI-521: 6-digit,7-segment, 1"(25mm) LCDs with 16 annunciators and
backlight
2.4.1 Keypad
l6 push buttons
2.4.2 Environment
2.4.3 Load Cell Excitation
Model Working Current
SBI-521 ≤100mA (use battery, no load-cell, no adaptor, LED.BRT is set to 2)
SBI-521 ≤45mA (use battery, no load-cell, no adapter, backlight is on)
Working temperature -10°C to 40°C
Storage temperature -20°C to 70°C
Humidity 10 to 90% RH without condensation
Protection IP65
Voltage 5VDC
Max. Current 120mA (can power 8-350 ohm bridge)
Signal connection 4 or 6 lead with sense leads
Max Sensitivity -3mV/V to +3mV/V

16 SBI521 Service Manual
2.5 Communication
2.6 Analog Circuitry
l24-bit A/D converter
lConversion Speed: 10Hz or 80Hz
lInput range: -15mV to +15mV
lOutput code:1mV input between S+ and S- of loadcell connector will output
about 100,000 raw counts
lHardware low pass filter and 2 programmable digital low pass filters
2.7 Capacity and Division
lProgrammable
lMax display range: -999,999 to 999,999
lDivision number range for primary unit: 100-100,000 (division number will be
limited by REGULA setting)
lRecommended Sensitivity: >0.5uV/ display division
2.8 Accuracy
≤0.01%
2.9 Approvals
NTEP: Class III, certificate # 11-119
2.10 Calibration Method:
lSoftware calibration with long-term storage in EEPROM
lProvides smooth curve fit through four points
lCalibration can be done under kg or lb weight unit with 10% -100%FS
standard weight.
Serial port1 Full-duplex RS-232
Serial port2 Full-duplex RS-232 or half-duplex RS-485
Baud Rate Selectable: 1200-2400-4800-9600-19200-22800/38400-57600 bps
Data Output Format 8N1, 7O1, 7E1
Protocol programmable

SBI521 Service Manual 17
2.11 Real Clock
lBuilt-in nonvolatile real time & date
2.12 Other Main Functions
lProgrammable zero range
lProgrammable pre-set tare weight
lProgrammable automatic zero point tracking
lProgrammable motion detection window
lProgrammable auto-power off time, backlight working mode (LCD version)
and adjustable LED brightness (LED Version)
lProgrammable hold function with peak weight holding and dynamic weighing
lAvailable check weighing mode
lAvailable parts counting mode
lAvailable percentage working mode
lAvailable units of measure: kg, lb, lb:oz, PCS, %
lBattery voltage display and charge indication
lProgrammable serial output content

18 SBI521 Service Manual
3 Configuration
To set up the indicator, you must first enter the appropriate menu mode. The front panel
keys become directional navigators to move around in the menus. See Table 3.3 for
details.
3.1 Front Panel
The front panel incorporates the display and keypad.
3.1.1 LED Version
Class
III
Brecknell
Max
d=