ABB IISAC01 Analog Control Station

‑ Power Supply：21.6‑27.0 VDC，typical 24 VDC；consumption 540 mA@24VDC

‑ Mechanical Structure：panel flush‑mount housing；dimension 72 mm × 144 mm × 381 mm；weight approx 1.25 kg

‑ On‑board Resources：analog input conditioning circuit, D/A conversion unit, serial communication interface, plasma bar‑graph drive, keyboard scanning logic, self‑diagnosis circuit

‑ Communication Interface：5 kHz / 40 kHz serial link, connect to Harmony termination module NICS01 / NTCS04

‑ Galvanic Isolation：signal‑side and logic‑side galvanic isolation

‑ Signal Types：analog process‑variable input；analog control‑output；set‑point internal calculation

‑ Display：3‑channel high‑resolution gas plasma bar‑graph for process variable, set‑point, output value；8‑character alphanumeric display for value, mode, alarm and fault code

‑ Operation Mode：Auto / Manual / Cascade control mode switch via front‑panel membrane keys

‑ Protection：input surge suppression, signal over‑range detection

‑ Status LED：power indicator, fault/alarm indicator

‑ Weight：approx 1.25 kg

‑ Realizes single‑loop man‑machine operation interface for Harmony DCS: displays process variable, set‑point and control output value via bar‑graph and character screen.

‑ Supports mode switching between automatic, manual and cascade; operator can modify set‑point and manually adjust output locally.

‑ Receives process analog signal, supports square‑root processing for flow measurement application.

‑ Communicates with Harmony controller through serial bus, exchanges loop parameters, operation commands and alarm information.

‑ Local alarm indication for process over‑range and station hardware fault.

‑ Module self‑diagnosis monitors power supply, communication link and internal hardware, reports fault status to upper controller.

‑ Cannot run independently; must cooperate with corresponding termination I/O modules (NICS01, NTCS04 etc.) and Harmony controller. IISAC01 belongs to legacy DCS hardware, pin‑compatible only within same series, cannot substitute other control‑station models directly.

‑ Continuously monitors power supply, serial communication link and internal hardware health; faults will trigger local alarm and send fault word to DCS controller.

‑ No local storage for historical data; parameters and fault information are read via upper‑level DCS system.

‑ Module hardware failure will cause loss of local loop operation function; DCS remote automatic control can still work if controller side is intact, but on‑site manual intervention is unavailable.

‑ Serial link interface: connect to NICS01 / NTCS04 termination module for data exchange with Harmony controller.

‑ Mounting：panel flush mounting

‑ Operating Temperature：‑10 ℃ ~ +55 ℃

‑ Storage Temperature：‑40 ℃ ~ +70 ℃

‑ Relative Humidity：5‑95 %RH, non‑condensing

‑ Protection Class：front‑panel meets local panel‑mount requirement, rear side inside cabinet.

‑ Panel cut‑out dimension shall comply with specification; wiring must follow DCS drawing, distinguish signal loop and power supply loop.

‑ For spare‑part replacement: verify model IISAC01; after installation check serial communication link, verify display, mode switch, set‑point and manual output function. Mismatched hardware version may cause communication failure or display anomaly.

‑ Module fault will result in loss of local operator control for corresponding control loop.

Thermal‑power plant, chemical and petro‑chemical process control; ABB Harmony legacy DCS system; industrial spare‑part for single‑loop local operator‑station unit.