Technical Specifications Part Number: 3BSE052605R1 Operating Supply Voltage: 24 VDC ±10% Number of Output Channels: 8 independent output channels Output Signal: 4‑20 mA DC D/A Resolution: 16‑bit HART Support: HART 5, HART 7 Maximum Load: 750 Ω per channel Isolation: Group galvanic isolation Hot‑Swap Support: Yes Operating Temperature: 0 ℃ to +60 ℃ Storage Temperature: ‑40 ℃ to +85 ℃ Relative Humidity: 5%‑95%, non‑condensing Mounting Type: S800 rack plug‑in Protection Class: IP20 Certifications: CE
Functional Features Outputs 8‑channel 4‑20 mA analog control signals for HART smart field actuators. Bidirectional HART communication reads instrument diagnostic data and writes device parameters. Hardware short‑circuit protection for each analog output loop. Supports hot‑swap online module replacement without system shutdown. Front‑panel LED indicators display module power‑on, running and channel fault status. Matched detachable terminal unit facilitates field wiring and maintenance operations. All channel parameters configured via Control Builder M software. Seamless data interconnection with ABB 800xA plant asset management functions. Full mechanical compatibility with S800 rack series hardware.
Working Principle The module receives 24 VDC power supply from S800 rack backplane bus. Digital control commands and HART communication instructions from AC800M controller transmit to AO815 module via backplane bus. 16‑bit D/A conversion chip converts digital set‑point values into analog 4‑20 mA current signals. HART modem superimposes bidirectional HART digital data onto analog current loops. Analog output signals drive field HART smart valve positioners and actuators through matched terminal unit. Galvanic isolation unit separates field‑side circuit and DCS internal logic circuit. Hardware short‑circuit protection activates upon output‑loop short‑circuit fault.
Installation Requirements Insert AO815 module into designated slot of S800 standard rack and install supporting terminal unit. Complete cabinet protective earthing strictly according to official system grounding specifications.
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