FAA-28, Technical Manual, Rev.1.1.0
February 2022
Page 3 of 21
2. Front View, Features and Specifications
High speed analog load cell transmitter FT-28 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 reduces commissioning and service times.
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 analog outputs of the instruments 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 LEDs in front of the
instrument. The front view and pin descriptions of FAA-28 is shown below.
Pin Name
Definition
LOAD CELL CONNECTION
+ Ex
+ Excitation
- Ex
- Excitation
+Se
+Sense
-Se
-Sense
+ Si
+ Signal
- Si
- Signal
Shield and Protective ground
ANALOGUE OUTPUT
I
Current output
V
Voltage output
G
GND
SERIAL CONNECTION
TX
TxD ( RS232C )
RX
RxD ( RS232C )
G
Ground ( RS232C )
-
Zeroing input (0V)
+
Zeroing input (+24V)
SETPOINT CONNECTION
Q1
Digital Output 1
Q2
Digital Output 2
Com
Digital Outputs Common
POWER SUPPLY
24V
+24VDC
0V
0VDC
FAA-28
