Description
HollySys K-AI01
Technical Specifications Multi-channel analog input; Signal type 4~20mA, 0~5V; 16-bit A/D conversion; Backplane bus communication; Module power supplied from DCS rack; DIN rack installation; Protection class IP20.
Functional Features High precision analog to digital conversion; Channel signal over-range detection; Open circuit diagnosis for current input; Isolation between field side and DCS backplane; Channel configuration via DCS software; Status LED for power and channel fault; Anti-surge protection for field signal terminals.
Application Scenarios Chemical plant DCS process signal acquisition; Thermal power plant analog measurement collection; Water treatment control system; Metallurgy continuous process monitoring.
Performance Parameters Operating temperature 0℃ to +60℃; Storage temperature -40℃ to +85℃; Relative humidity 5% to 95% no condensation; Conversion accuracy 0.1% FS.
Material Composition Flame-retardant plastic module housing; Multi-layer PCB; A/D conversion chip; Signal isolation optocoupler; Surge suppression circuit; Brass nickel-plated terminals; LED indicators.
Structural Characteristics Single slot DCS rack module; Back gold finger connects to K series DCS backplane; Front terminal block for field instrument wiring; Front panel LED indicators for power and channel fault; Internal isolation between field analog circuit and digital bus circuit.
Working Principle Field analog current or voltage signal enters module through terminal block. Signal conditioning circuit adjusts signal range, then A/D chip converts analog value to digital data. The module transmits digital data to DCS controller through backplane bus. The module continuously judges whether each channel is over-range or open circuit and reports fault status to controller.
Installation Requirements Cut off DCS rack power before inserting module. Install module on DCS rack and lock buckle. Field instrument uses shielded twisted pair cable, shield single point grounding. Configure channel signal type in DCS configuration software, download configuration and verify signal collection. Cabinet reliable earthing.
Usage Notes Cut power before wiring. Do not mix analog signal cable and power cable in same cable trunk. Calibrate channel regularly. Do not hot swap module in running DCS system.
