Specifications

• Manufacturer: Emerson (Westinghouse)

• Model: 3A99863G14

• Type: Isolated Analog Input Module (AI)

• Architecture: Q‑line rack‑mount, high‑density

• Channels: 8 isolated differential analog inputs

• Signal Ranges:

  • Voltage: 0–5 VDC, 1–5 VDC, ±2.5 VDC

  • Current: 4–20 mA, 0–20 mA

• Resolution: 12‑bit (13‑bit for bipolar voltage)

• Isolation: 1000 Vrms channel‑to‑ground

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

• Conversion Time: <5 ms per channel

• Accuracy: ±0.1% of full scale at 25 °C

• Operating Temperature: 0 °C to 60 °C

• Power Supply: 24 VDC ±10%, typical 8 W

• Features: Hot‑swap, LED status indicators, noise immunity

• Compatibility: Legacy WDPF, Ovation DCS

• Weight: Approx. 1.1 kg

Key Features

• 8‑channel high‑precision measurement for process variables.

• 1000 Vrms isolation eliminates ground loops and EMI.

• Multi‑range input supports standard transmitters (4–20 mA, 1–5 VDC).

• Hot‑swap capability allows online replacement without shutdown.

• LED diagnostics for power, communication, and channel faults.

• Robust construction for long‑term service in harsh environments.

Applications

• Power plants: Temperature, pressure, flow, level monitoring.

• Petrochemical: Process parameter acquisition and control.

• Water treatment: Pump speed, pressure, and flow monitoring.

• Spare part replacement for existing WDPF/Ovation systems.

Related Part Numbers

• 3A99860G01/G02/G04: 8‑channel AI (left/right slot)

• 3A99862G14: 8‑channel AI (QAW variant)

• 3A99859G03/G04: 32‑channel digital input

Notes

• Legacy module: Supplied as a replacement for installed base systems.

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