81AA03A-E (GJR2394100R1210) ABB 8-Channel Universal Analog Input Module

The 81AA03A-E is a genuine ABB eight-channel universal analog input module engineered for Symphony Plus and AC 800M systems. It accepts RTD, thermocouple, voltage and current signals with 16-bit resolution and automatic cold-junction compensation, delivering ±0.1 % accuracy for temperature, pressure and flow monitoring in power, process and marine applications.

• 100% OEM ABB - serialized & factory-sealed
• 8 universal inputs: RTD, TC, 0-10 V, ±10 V, 0-20 mA, 4-20 mA
• 16-bit resolution (0.0015 %) & ±0.1 % accuracy
• Auto cold-junction compensation for all TC types
• Sensor break, short-circuit & over-range diagnostics
• 250 ms scan time (50-500 ms configurable)
• Hot-swappable on DIN-rail or S800 rack
• -40 °C … +70 °C operating, conformal-coated
• SIL 2 (IEC 61508), CE, UL 508, ATEX, IECEx certified

• Steam & gas turbine temperature monitoring
• Chemical reactor vessel RTDs
• Marine engine exhaust & jacket water
• HVAC & chiller loops
• SIL 2 safety-critical temperature control

• 1× 81AA03A-E module
• 1× Removable 40-pin spring-clamp terminal block
• Factory calibration certificate & traceability label
• Quick-start guide & ESD wrist strap

1. Mount on DIN-rail or insert into S800 rack.
2. Connect 24 VDC supply and sensor wiring.
3. Power on--green READY LED < 5 s.
4. Configure sensor types & alarms in ABB Automation Studio.
5. Perform sensor loop test & SIL proof-test.