Technical Specifications Model: DSAI146 System Compatibility: ABB Advant OCS DCS system Input Channel Quantity: 16 analog input channels Input Signal Type: 4‑20 mA current input A/D Conversion Resolution: 12‑bit Isolation: Group‑wise galvanic isolation Power Supply: From Advant rack backplane Mounting: Eurocard rack plug‑in module Operating Temperature: 0 ℃ to +60 ℃ Storage Temperature: ‑40 ℃ to +85 ℃ Relative Humidity: 5‑95 %, non‑condensing Protection Class: IP20 Certifications: CE
Functional Features Sixteen‑channel high‑density 4‑20 mA analog current input acquires large‑quantity field transmitter signals. 12‑bit analog‑to‑digital conversion realizes analog‑signal high‑precision digital quantization. Group‑wise galvanic isolation restrains field‑side common‑mode interference. Built‑in signal over‑range and under‑range detection function for each input channel. Front‑panel LED indicators display module power‑on, running and fault alarm status. Integrated hardware self‑diagnosis monitors backplane power‑supply and internal circuit fault. Supports hot‑swap operation under Advant system permitted maintenance workflow.
Application Scenarios Advant OCS system DSAI146 analog input module spare‑part replacement. Legacy process industry DCS cabinet multi‑point flow, pressure, temperature signal acquisition. Old‑generation ABB DCS system hardware maintenance and expansion renovation projects.
Installation Requirements Align DSAI146 module with Advant rack slot guide rail, insert fully and fasten edge locking screw. Connect field transmitter 4‑20 mA shielded signal cables to front‑side screw terminals, tighten terminals to specified torque. Implement protective earthing complying with Advant OCS system grounding specification. Analog signal shielded cables must be physically separated from high‑power power cables inside cabinet.
Usage Notes Field input signal shall stay within 4‑20 mA rated signal scope. Field signal wiring adopts shielded twisted‑pair cable and performs single‑point shielding earthing. Periodically inspect terminal fastening status and remove cabinet dust accumulation. Avoid installation location near strong electromagnetic interference sources. Follow lock‑out‑tag‑out safety procedure before module extraction or replacement.
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