Specifications

• Manufacturer: Westinghouse (Emerson)

• Model: 3A99860G01 (QAX‑56ACE)

• Type: Analog Input Module

• Architecture: Q‑Line, left‑side slot

• 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

• Form Factor: Standard Q‑Line rack‑mount card

• Indicators: LED for power, communication, and channel status

• Compatibility: WDPF, legacy Ovation DCS

• Weight: Approx. 1.1 kg

Key Features

• 8‑channel high precision: Suitable for accurate process variable monitoring.

• Left‑slot design: Matches Q‑Line rack layout for legacy systems.

• 1000 Vrms isolation: Protects against industrial noise and ground loops.

• Multi‑range support: Configurable for voltage or current signals.

• Hot‑swap capable: Online replacement without system shutdown.

• LED diagnostics: Quick visual check of power, comms, and channel health.

• Legacy reliability: Built for long‑term operation in critical facilities.

Applications

• Power generation: Temperature, pressure, flow, and level monitoring.

• Petrochemical: Process parameter monitoring and control.

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

• Heavy industry: Vibration, temperature, and analog sensor monitoring.

• Spare part replacement for existing WDPF/Ovation systems.

Related Part Numbers

• 3A99860G02: 8‑channel analog input (right slot)

• 3A99859G01/G02: Digital I/O modules (right/left slot)

• 3A99859G03/G04: 32‑channel digital input (left/right slot)

Notes

• Legacy component: Supplied primarily as a spare for installed WDPF/Ovation systems.

• For new projects, Emerson recommends modern Ovation AI modules for enhanced diagnostics and performance.