Basic Specifications

• Manufacturer: Emerson (Westinghouse)

• Model: 3A99795H04

• Type: Analog Output Module (Ovation DCS I/O)

• Channels: 4 isolated channels, 12‑bit resolution

• Output Ranges: 4–20 mA (default), 0–10 VDC (configurable)

• Isolation: 1000 V channel‑to‑channel and channel‑to‑ground

• Operating Temperature: 0 °C to 60 °C

• Mounting: Standard DIN rail, cabinet‑mounted

• Country of Origin: United States

• Certifications: CE, UL, cUL, EMC compliant

Key Features

1. High‑Accuracy Output: 12‑bit resolution with ±0.1% full‑scale precision for closed‑loop control.

2. Hot‑Swap Capability: Online replacement without system shutdown, minimizing downtime.

3. Comprehensive Diagnostics: Onboard LEDs (PWR, COMM, FAULT) and register‑based status for fast fault isolation.

4. Noise Immunity: Shielded design and built‑in filtering for high‑EMI industrial environments.

5. Software‑Configurable: Set ranges, alarm limits, and failsafe states via Ovation tools; preset parameters for Emerson sensors.

6. Robust Hardware: Industrial‑grade components for long life in harsh conditions.

Installation & Configuration

1. Mounting: Install on DIN rail in a cabinet; ensure airflow and wiring clearance.

2. Wiring: Connect field devices with shielded cables; follow Ovation standards for analog signals.

3. Software Setup:

   • Launch Emerson Ovation configuration software.

   • Select 3A99795H04 from the device library.

   • Configure output type (4–20 mA / 0–10 VDC), failsafe values, and alarms.

   • Download configuration and verify with real‑time data.

4. Maintenance: Use software to reset faults, back up/restore configurations.

Safety & Compliance

• Electrical Safety: Disconnect power before installation/maintenance to avoid shock.

• Environmental: Dispose per local e‑waste regulations.

• Quality: Manufactured under Emerson’s ISO 9001 system, meeting EMC and safety standards.

Troubleshooting

• No Power: Check supply voltage, connections, and user‑replaceable fuse.

• Communication Errors: Verify network wiring, termination, and controller compatibility.

• Output Inaccuracy: Check wiring, shielding, and device calibration; confirm range matches actuator.

• Fault LED On: Use Ovation diagnostics to isolate internal/external faults.

Warranty & Support