• Manufacturer: Emerson (Westinghouse)

• Model: 3A99992H02

• Type: Performance Isolated Analog Input Module (AI)

• Compatible Systems: Ovation, WDPF DCS

• Channels: 8 isolated differential inputs

• Signal Ranges:

  • Voltage: ±10 VDC, 0–10 VDC, 1–5 VDC

  • Current: 4–20 mA, 0–20 mA

• Resolution: 16‑bit

• Isolation: 1000 Vrms channel‑to‑ground

• Input Impedance: Voltage >10 MΩ; Current ≈250 Ω

• Conversion Time: <3 ms/channel (faster than 3A99990H02)

• Accuracy: ±0.05% FS at 25 °C

• Operating Temperature: 0 °C to 60 °C

• Power Supply: 24 VDC ±10%, ~9.5 W

• Key Features: Hot‑swap, LED status indicators, HART compatibility, EMI filtering

• Weight: Approx. 1.2 kg

Key Features

• 16‑bit high resolution delivers precise measurement for critical processes.

• 1000 Vrms galvanic isolation protects against ground loops and electrical noise.

• Multi‑range input flexibility works with standard transmitters (4–20 mA / ±10 VDC).

• High‑speed conversion (<3 ms/channel) for dynamic process monitoring.

• Hot‑swap capability enables online replacement without system downtime.

• HART compatibility allows integration with smart field devices.

• Industrial‑grade design for reliability in harsh environments.

Applications

• Power Generation: High‑precision boiler/turbine temperature, pressure, flow, level monitoring.

• Petrochemical & Refining: Accurate process variable acquisition for reactors, distillation columns.

• Heavy Industry: Steel, cement, and pulp/paper process control.

• Legacy DCS Maintenance: Direct replacement for Ovation/WDPF system upgrades and spares.

Related Part Numbers

• 3A99990H02: 8‑channel 16‑bit AI (standard speed)

• 3A99989H13: 8‑channel 12‑bit AI (economy model)

• 3A99863G14: 8‑channel AI (Q‑line series)

Notes

• Legacy OEM module: Original part for Emerson Ovation/WDPF DCS.

• Performance upgrade: Faster conversion than 3A99990H02.

• For new projects, Emerson recommends current Ovation I/O modules.

• Documentation: Datasheet and installation manual available upon request.