Technical Specifications Multi‑channel analog signal input interfaces, system internal bus connector, auxiliary DC power supply. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Conformal coated circuit board.
Functional Features Receives standard 4‑20 mA or voltage analog signals from field instruments. Completes signal filtering and analog‑digital conversion. Transmits digital process data to main controller through internal bus. Built‑in channel self‑diagnosis detects signal over‑range and circuit abnormality.
Application Scenarios Spare analog input board for ABB industrial control cabinet. Applied in process industry measuring signal acquisition for temperature, pressure and flow.
Performance Parameters High‑precision multi‑channel analog‑digital conversion performance. 
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Analog signal conditioning circuit, analog‑digital conversion chip, bus interface assemblies. Multi‑pin plug‑in connectors and metal screw mounting hardware.
Structural Characteristics Rectangular circuit‑board structure. Reserved screw mounting holes for cabinet internal fixation. Analog input area and digital bus area are separated on PCB layout.
Working Principle UAD149A0011 obtains auxiliary DC power supply. Field analog signals enter each input channel, pass through filtering and conditioning circuit. Analog‑digital chip converts analog quantity into digital value. Digital process data is transmitted to main controller through internal system bus.
Installation RequirementsFasten board to cabinet mounting bracket with screws. Fully insert and lock each plug‑in connector. Restore power supply, verify each channel measuring value consistency with field instrument output.
Usage Notes Field signal wiring polarity must be correct. Anti‑static operation is mandatory.
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