Fairbanks S143/981027 Signal Trim Junction Box, Model JB3

Multi‑channel signal trim and junction module designed for Fairbanks weighing and instrumentation systems. Provides adjustable signal balancing for multiple load cells or analog inputs using onboard trimmer potentiometers and high‑density terminal blocks. Technical Specifications Manufacturer: Fairbanks Model Number: JB3 Board Identifier: S143 / 981027 Product Type: Signal trim junction box (printed circuit board style) Function: Load cell or analog signal trimming, balancing, and distribution Channels: 4 adjustable channels (labeled S1, S2, S3, S4) Adjustment Components: Four multi‑turn trimmer potentiometers with “INCREASE” direction marking Terminals: Multiple green screw‑terminal blocks for inputs, outputs, and grounding Signal Labels (visible): +SI1, –SI1, GND, OUT and equivalents for SI2/SI3/SI4 Components: Precision resistors, diodes, trimmer potentiometers, terminal blocks Board Construction: Through‑hole PCB, blue substrate, four mounting holes Back‑Side Markings: QC label “PASS QC‑20” Applications: Load cell summing, sensor signal leveling, analog distribution in scale systems Country of Manufacture: USA Please review pictures carefully and let us know if you have any questions!