Type FAA-25 Analogue Amplifier
T
EECCHHNNIICCAALL
T
M
AANNUUAAL
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Flintec GmbH
Bemannsbruch 9
DE 74909 Meckesheim
GERMANY
www.flintec.com
Table of Contents:
1. Features .......................................................................................................................................................... 3
1.1. Technical Specification ........................................................................................................................... 3
1.2. Housing Dimensions .............................................................................................................................. 3
1.3. Model Identification ........................................................................ Fehler! Textmarke nicht definiert.
2. Installation and Commissioning ...................................................................................................................... 4
2.1. Mechanical Installation ........................................................................................................................... 4
2.2. Electrical Connections ............................................................................................................................ 4
2.3. Load Cell Connection ............................................................................................................................. 5
2.4. Analogue Output Connection ................................................................................................................. 5
2.5. Optional Digital Inputs / Outputs ............................................................................................................ 5
2.6. Optional RS232C Serial Interface .......................................................................................................... 5
2.7. Commissioning ....................................................................................................................................... 5
3. Operation ........................................................................................................................................................ 6
4. Setup and Calibration by using the Key Buttons ............................................................................................ 6
4.1. Setup of the Analogue Output Mode ...................................................................................................... 6
4.2. Setup and Calibration ............................................................................................................................. 6
4.2.1. Entering Setup & Calibration ............................................................................................................................. 7
4.2.2. Setup & Calibration ........................................................................................................................................... 7
4.2.3. Exit from Setup & Calibration ............................................................................................................................ 7
5. Setup and Calibration via Serial Interface ...................................................................................................... 8
6. Troubleshooting .............................................................................................................................................. 8
7. Declaration of Conformity ............................................................................................................................... 9
PRECAUTIONS
DONT LET UNAUTHORIZED PEOPLE INTERFERE WITH THE INSTRUMENT.
CHECK THE SUPPLY VOLTAGE, THE LOAD CELL AND ESPECIALLY THE
GROUND CONNECTIONS BEFORE ENERGISING FAA-25.
DON’T ENERGISE FAA-25 BEFORE MAKING THE LOAD CELL CONNECTION.
DON’T CONNECT / DISCONNECT THE CABLES AND/OR CONNECTORS WHILE
FAA-25 IS ENERGISED.
DO NOT OPEN THE ENCLOSURE WHILE FAA-25 IS CONNECTED TO THE
POWER SUPPLY.
WARNING !
The Error LED can be active before calibration. Do not care the error status before
performing the calibration of your weighing system.
FAA-25 Technical Manual, Rev. 2.08 January 2012
Page 2 of 10
1. Features
The amplifier type FAA-25 is an accurate and economic load cell transmitter, easy to integrate into process
controll systems. By its “digital heart” – modern microcontroller technology – type FAA-25 allows a comfortable
calibration and setup with a combination of LED’s and push buttons.
The analogue signal output is programmable to 0 – 10 V and 4 – 20 mA.
An opto-isolated interface option offers two setpoints, one error output, one input for zeroing by external
command and one RS232C serial interface for setup and electronic calibration (PC software “xFace”).
1.1. Technical Specification
INPUT & A/D CONVERTER
Linearity 0.01 % or better
Analogue input range 0 mV to 20 mV
Min. input range < 1 mV
A/D converter 24 bit Delta-Sigma ratiometric with integral analog and digital filters
Resolution Min. 0.1 μV/d
Internal resolution Min. 8 million counts
Conversion rate Up to 100 measurement values per second
SCALE CALIBRATION & ANALOGUE OUTPUT
Calibration
Digital filter 2 step adjustable digital adaptive filter
Weighing functions
D/A converter 16 bit
Analogue output
Set points 2 programmable free setpoints (option board required)
LOAD CELLS
Excitation 5 V DC
Number of load cells
Connection 4 or 6 wire technique. Cable length 274 m/mm² for 6 wire connection
SETUP & COMMUNICATION
Front panel Membrane keypad including 2x LED and 3x programming keys
eCal Electronic calibration without test weights using PC software (option board required)
POWER
Power supply 24 V DC (18…30 V DC), 200 mA
ENVIRONMENT AND ENCLOSURE
Operation temperature Between -10 °C and +40 °C at 85% RH max, non-condensing
Enclosure Polyamide, for DIN-rail mount, IP20
OPTION
Interface option
Characteristics of digital
outputs
Performed with keys. There is no switch or resistor for adjustment in the instrument;
alternatively by PC-software (option board required)
Zeroing via opto-isolated digital input (option board required);
max. zeroing range is 30% of weighing range
Current output 4-20 mA (at max. 500 load) or
voltage output 0-10 V (at min. 10 k load)
Up to 4 units of 350 or 12 units of 1100 (min. 85 )
2 opto-isolated outputs for 2 setpoints, 1 opto-isolated error output, 1 opto-isolated input for
zeroing and 1 RS232C serial interface
NPN open collector; 18…30 V DC, max. 50 mA
1.2. Housing Dimensions
FAA-25 Technical Manual, Rev. 2.08 January 2012
Page 3 of 10
2. Installation and Commissioning
PRECAUTION: Please read this manual carefully before energizing the amplifier and perform the commission-
ing operation according the procedure given here. Use trained personnel for commissioning, checking and
service of the instrument. The interference of untrained personnel may cause unwanted damages or injures.
2.1. Mechanical Installation
First of all please determine the place where your instrument can operate safely. 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.
The cables should be installed safely to avoid mechanical damages.
Take care to the housing dimensions given in chapter 1.2. To avoid electrical noise protect your transmitter
which has very low input signal level, from the equipment that produces electrical noise.
Place your transmitter in a separate panel from the frequency converters and motor contactors, or at least place
it in another partition of the panel. Do not combine signal cables and power cables in cable trays. And check
that the cables are wired properly in order to prevent mechanical damage.
2.2. Electrical Connections
The pin layout of FAA-25 is shown below. Electrical connections should be done carefully. FAA-25 requires a
power supply of 230 V AC (50 Hz, 6 VA, see figure 1) or 24 V DC (200 mA, see figure 2 ) to operate.
The meanings of the pins are:
Pin Definition
LOAD CELL CONNECTION
- Ex - Excitation
- Se - Sense
+ Se + Sense
+ Ex + Excitation
- Si - Signal
+ Si + Signal
Shield
DIGITAL I/O OPTION
Err Error output
+ Vc Common +24V DC for outputs
O1 Digital output no. 1
O2 Digital output no. 2
NC Not Connected
Com Zeroing input (0 V)
Z Zeroing input (+24 V)
TX Transmit (RS232C)
RX Receive (RS232C)
G Ground (RS232C)
ANALOGUE OUTPUT
I
G GND (- Signal)
V 0 - 10V output (+Signal)
NETZANSCHLUSS
0V 0 V
24V 24 V DC
NC Not Connected
0 - 20mA output (+ Signal)
Shield
Shield
Figure 1: FAA-25, front view
and pin layout
Do not forget to connect the shield of the load cell cable and the analogue output cable to FAA-25 at the
correct ground terminals.
The quality of the grounding of your system provides the accuracy of your weighing system beside it’s safety. If
the condition of the power line in the plant is bad, prepare a special power line and grounding.
If you have to service the instrument, turn off the power and wait at least for 30 seconds before interfering.
Perform the other connections to FAA-25 as described below.
FAA-25 Technical Manual, Rev. 2.08 January 2012
Page 4 of 10
2.3. Load Cell Connection
The load cell wiring should be made carefully before energizing to avoid damages to the instrument and the
load cells. The input resistance of the load cells that you want to connect should be more than 85 Ω.
The sense pins of the instrument must absolutely be connected. In 4-wire installations the sense and the
excitation pins with the same polarity should be short circuited at the connector side.
Pin 6-wire Load Cell Connection 4-wire Load Cell Connection
+ Ex + Excitation + Excitation
+ Se + Sense + Excitation
- Se - Sense - Excitation
- Ex - Excitation - Excitation
+ Si + Signal + Signal
- Si - Signal - Signal
Shield Shield
2.4. Analogue Output Connection
There are 2 analogue outputs on FAA-25, one is for 0 – 10 volt and the other for 4 – 20 mA. But only one of
them can be used at the same time and has to be selected in the setup mode.
The wiring of the analogue output should be done according to the pin configuration given in the table below.
Pin Definition
V 0 – 10 V output (+ Signal)
I
G GND (- Signal)
0 – 20 mA output (+ Signal)
Shield
2.5. Optional Digital Inputs / Outputs
Optionally two setpoint outputs, one error output and one zeroing input can be added to type FAA-25.
If an input signal is supplied to the zeroing input, the analogue output signal of FAA-25 will be set to “0 kg”.
The setpoints will be active when the weight value is higher than the entered setpoint value.
If any failure occurs within FAA-25, an error output will be indicated with the LED on the front panel.
If you want to use these I/O, prepare the circuits as shown below.
+
Error or setpoint
Figure 2. Optional digital I/O connection diagram and error output description
Zero
Common
R
load
Error Output
Status Definition
1 OK
0 Error
2.6. Optional RS232C Serial Interface
The optional serial interface can be used for eCAL (electronic calibration), adjusting filters, entering setpoint
values, exporting status information, etc. The pin configuration is shown in Figure 1.
2.7. Commissioning
After making the connections of FAA-25 as described above, energize FAA-25 carefully. Then set the
instrument to the desired analogue output mode and perform the setup and calibration operations.
Check the performance of your system with different test weights. After you have assured the accuracy of the
system you can use it.
FAA-25 Technical Manual, Rev. 2.08 January 2012
Page 5 of 10
3. Operation
There are 2 LEDs and 3 keys on the front panel of FAA-25. The
keys are used for setup and adjustments and the LEDs have
different meaning in operation and setup mode. The usage of the
keys is described in chapter 4.
In operation mode with connected electrical load the green RUN
LED is on and the red ERROR LED is off. See chapter 6 in case of
the red LED turns on.
The status of the LEDs during normal operation is given in the table
below.
In normal operation 0 – 10 V output 4 – 20 mA output
Green RUN LED
Red ERROR LED Off Off
Flashes (on for 4 seconds)
On
For troubleshooting see chapter 6.
The analogue output signal gives information about the status of the system and the weighing process:
Condition 0 – 10 V output 4 – 20 mA output Error (option)
Operation X X High
Setup X X Low
Weight is higher than the range (Over) 13 V 24 mA Low
Weight is lower than the zero range (Under) -1.4 V 0 mA Low
System Error 13 V 24 mA Low
ADC is out of operating range -1.4 V 0 mA Low
4. Setup and Calibration by using the Key Buttons
During the power on period the green and red LEDs are lightened for 3 seconds. After both LEDs turned off for
a short period, one of them will be lightened. If you did not follow this LED signalization sequence, power off the
instrument, check the power and the load cell cables and power it on again.
In this step the lightened LED informs you about the active analogue output mode of the instrument. If the green
RUN LED is continuously lightened, the analogue output mode is 4 – 20 mA; if it flashes, the analogue output
mode is 0 – 10 V (the electrical load should be connected before). If the planned usage is different from the
active mode, you have to select the analogue output mode first, see Chapter 4.1.
After this the instrument is set up and calibrate as described in Chapter 4.2.
Finally check the performance of your system with different test weights. After being sure of the accuracy of the
system you can use it.
4.1. Setup of the Analogue Output Mode
The selected analogue output mode (voltage or current) is indicated by the RUN LED and the ERROR LED as
described in chapter 3.
If you want to change the analogue output mode press
and keys simultaneously.
If you have changed the analogue output mode, you have to recalibrate the transmitter – regardless if it
has already been calibrated for the other output mode.
4.2. Setup and Calibration
Warning: The analogue output mode shall be selected as 0 – 10 V or 4 – 20 mA before the calibration.
Do not forget to calibrate the instrument after changing the analogue output mode.
In this chapter you will find the required information for the setup and the calibration of FAA-25. The symbols at
the right bottom of the keys show the function of the keys in setup mode. The meanings of the keys in the setup
mode are given in the table below.
Enter / exit the setup mode
Go to the next step
Save
FAA-25 Technical Manual, Rev. 2.08 January 2012
Increase the value
Setup Setpoint no. 1
Filter type “High”
Decrease the value
Setup Setpoint no. 2
Filter type “Low”
Page 6 of 10
4.2.1. Entering Setup & Calibration
Press and keys simultaneously to enter the “Setup and Calibration” menu. The transmitter indicates
the started setup mode by flashing the two LEDs on the front panel three times sequentially. Then the green
LED flashes.
4.2.2. Setup & Calibration
The status of the LEDs on the front panel indicates the setup step. You can go to the next step by pressing the
key (in setup mode).
Setup steps
Zero
adjustment*
RUN
LED
green red
Flash
ERR
LED
Off
Zero and span adjustment are made in three different speeds:
If you press the arrow key to the desired direction repeatedly, the value will
be changed slowly.
If you press the arrow key continuously the value will be changed with
medium speed.
If you press the other arrow key while pressing the desired direction’s key
continuously the value will be changed quickly (coarse adjustment).
Unload the scale. Adjust the analogue output to 0 V or 4 mA by using the arrow
Description
Span
adjustment*
Setpoint
entry
Filter
selection
Flash
Off
Flash
Flash
On
On
On
Flash
keys
Save by pressing the
arrow key you will skip this step.
Load the scale. The load value must be between 10% and 100% of the
maximum weight to measure. Adjust the analogue output to the required value
for this load by using the arrow keys keys (increase) and (decrease).
Save by pressing the
arrow key you will skip this step.
Put a load equal to the desired setpoint value on the scale.
Press to assign this value as the first setpoint value (O1) OR
press
Save by pressing the
arrow key you will skip this step.
High filtering (lower frequency cut-off; longer settling time; factory default)
If you press the
Low filtering (higher frequency cut-off; shorter settling time)
If you press the
For increasing the stability of the weighing system try the “High” filter first. If you
need a faster response in your application set the filter type to “Low”.
(increase) and (decrease).
key. If you press the key without pressing any
key. If you press the key without pressing any
key to assign this value as the second setpoint value (O2).
key. If you press the key without pressing any
key in this step, the filter type will be set to “High”.
key, the filter type will be set to “Low”.
Save by pressing the key. If you press the key without pressing any
arrow key you will skip this step.
Exit and save
changes
* After 20 s without user interaction FAA-25 leaves the “Setup & Calibration” menu automatically.
Press the and the keys simultaneously to exit from the setup mode
and return to the operation mode. Without doing this step the amplifier will loose
all changes after power off.
4.2.3. Exit from Setup & Calibration
Press the and the keys simultaneously to save the changes, exit from the setup mode and return to
the operation mode.
FAA-25 Technical Manual, Rev. 2.08 January 2012
Page 7 of 10
5. Setup and Calibration via Serial Interface
If the FAA-25 amplifier includes an optional RS232C serial interface, you can perform eCal (electronic
calibration), normal calibration, adjust the filter, download setpoint values and indicate status information by
using the xFace software installed on a PC (valid for device serial no. J800110831 or higher; older devices
require the eCal-Transmitter software).
The minimum PC requirements are: MS Windows XP or Vista operating system
RS232C serial interface
Serial cable for RS232C signals between FAA-25 and PC
The xFace software for installation can be found on the Flintec CD-ROM in the directory “Software\Software for
Flintec Products\FAA-25“.
The main tab of this software is shown at the left.
eCal is made very easy:
1. Enter the total load cell capacity in [kg], the averaged
load cell’s rated output in [mV/V], the scale capacity in
[kg] and the estimated dead load value in [kg] into the
eCal window.
2. Click the button “Write eCal Data to Transmitter”.
After performing eCal as described in the software manual, check the performance of your system. After you
have assured the accuracy of the system you can use it. You can find essential information for using the xFace
software in its help file.
6. Troubleshooting
The type FAA25 amplifier has been designed as a very reliable and virtually error free instrument. However if an
error occurs do not attempt to repair the equipment before you understand what caused the error. Note the
status of the front panel LEDs, and try to find the problem with the help of the table given below. Don’t let
unauthorized people interfere with the instrument.
In case of an error the ERR LED indicates the analogue output mode like the RUN LED.
If the output mode is set to 4 -20 mA, the ERR LED lights continuously in case of an error. If the analogue
output mode is set to 0 – 10 V, the ERROR LED flashes.
FRONT PANEL LEDS
Green RUN LED Red ERROR LED
On / Flashing Off 1
Off Off 0
Off On / Flashing 0
The analogue output also gives additional information about the weighing system as described in chapter 3.
If the calibration was done wrong (e.g. the adjustment of the zero and the span was done with the same load by
accident) then following procedure has to be done:
1. De-power FAA-25 and re-power it again.
2. Switch the analogue output to the other non-active output mode.
3. Perform a „rough“ zero and span adjustment according chapter 4.2.2 respective chapter 5.
4. Switch the analogue output back to the wished output mode.
5. Perform a proper adjustment according chapter 4.2.2 respective chapter 5.
ERROR OUTPUT
(Option)
DEFINITION
Normal operation
No power
Board failure
Input signal is out of range
Calibration needed
Check output circuit & cables
Board failure
FAA-25 Technical Manual, Rev. 2.08 January 2012
Page 8 of 10
7. Declaration of Conformity
Flintec GmbH
Bemannsbruch 9
D 74909 Meckesheim
Konformitätserklärung
Declaration of conformity
0
Hersteller:
Manufacturer.
Fabricant:
Typ/ Modell:
Type l Model:
Type / modèle:
entspricht dem in der Bescheinigung über die Bauartzulassung beschriebenen Baumuster sowie den
Anforderungen der EG-Richtlinie 90/384/EWG in der jeweils geltenden Fassung und den Anforderungen
folgender Richtlinien:
corresponds to the production model described in the EC type-approval certificate and to the requirements of
the Council Directive 901384lEEC as amended and to the requirements of the following EC directives:
correspond au modèle décrit dans le certificat d'approbation CE de type, aux exigences de la directive
90/384/CEE modifiée et aux exigences des directives CE suivantes:
89/336/EWG 891336lEE 89/336/CEE
73/23/EWG 73123lEEC 73/23/CEE
entsprechend den folgenden Normen:
in conformity with the following standards:
conforme aux normes suivantes:
EN 45501
EN 50081-1
EN 50082-1
EN 60950
Diese Erklärung gilt nur in Verbindung mit einer Konformitätsbescheinigung einer benannten Stelle.
This declaration is only valid with a certificate of conformity by a notified body.
Cette déclaration est valide seulement avec une attestation de conformité d'un organisme notifié.
Unterschrift
Signature
Signature
Déclaration de conformité
Datum 8. Februar 2007
Date 8
Date 8ième février 2007
th
February 2007
Flintec GmbH
FAA-25
Gerhard K. Adam
Geschäftsführer
General Manager
Directeur
FAA-25 Technical Manual, Rev. 2.08 January 2012
Page 9 of 10
www.flintec.com
FAA-25 Technical Manual, Rev. 2.08 January 2012
Page 10 of 10
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