Emerson A3120/022-000 Dual-Channel Vibration Monitor

The Emerson A3120/022-000, also cataloged as the A3120 Vibration Monitor, operates as a dedicated hardware component for continuous absolute bearing vibration monitoring within rotating machinery protection platforms.

Suffix Breakdown & Model Matrix

Hardware Specifications

Channel-to-Channel Isolation & 4-20 mA HART Loop Protocols

The A3120/022-000 processes dynamic signals from connected accelerometers and velocity sensors across two independent monitoring channels. Internal signal conditioning circuitry features robust channel-to-channel isolation to prevent ground loop noise from corrupting absolute bearing vibration measurements. Output paths map filtered vibration values into configurable 4-20 mA or 0-10 V analog loops, providing continuous signal transmission to plant DCS and SCADA platforms for real-time tracking of imbalance and structural misalignment.

Frequently Asked Questions

Q: What power input voltage is required to operate the A3120/022-000 monitor?

A: The module operates on a nominal 24 V DC power supply input.

Q: What types of vibration transducers are compatible with the input channels?

A: The two independent input channels accept inputs from standard accelerometers and velocity sensors.

Field Installation Guidelines

• Mount the industrial enclosure onto a 35 mm DIN rail or flat panel cutout inside a protective control cabinet to protect against environmental contamination.
• Connect the primary 24 V DC supply lines using proper wire gauge sizes and verify polarity before applying power to the unit.
• Maintain shield wire continuity from accelerometer/velocity sensor field cables and connect shields to a single grounding point to eliminate ground loops.
• Isolate 4-20 mA analog output wiring from high-voltage AC cables to prevent inductive noise coupling during signal transmission.