FAA-28, Technical Manual, Rev.1.1.0
February 2022
Page 7 of 21
3.1
Mechanical Installation
The place where you will use/install your instrument should be clean, not getting
direct sunlight if possible, with a temperature between -15ºC and +55ºC, 85%
maximum relative humidity non-condensing. Install the instrument on the DIN rail in
the cabinet.
The instrument mechanical drawing
3.2
Load Cell Connection
The load cell wiring should be made carefully before energizing to avoid damages of
the instrument and load cells. In 4-wire installations the sense and excitation pins
with the same polarity should be short circuited at the connector side. If you have
junction box, use 6 wire cable between FAA28 and the junction box, and short circuit
these pins at junction box for better performance. The input resistance of the load
cells that you want to connect should be more than 43 Ω.
Pin Name
6 Wire Load Cell
Connection
4 Wire Load Cell
Connection
+Ex
+ Excitation
+ Excitation
+Se
+ Sense
Short circuit to + Excitation
-Ex
- Excitation
Short circuit to - Excitation
-Se
- Sense
- Excitation
+Si
+ Signal
+ Signal
-Si
- Signal
- Signal
Shield
Shield
