IS220PDOAH1A
IS220PDOAH1A
IS220PDOAH1A
IS220PDOAH1A
IS220PDOAH1A

GE IS220PVIBH1A | Vibration Monitor I/O Pack for Mark VIe – Field Service Notes

  • Model: IS220PVIBH1A
  • Alt. P/N: 336A4940CSP16
  • Product Series: GE Speedtronic Mark VIe
  • Hardware Type: Vibration Monitor I/O Pack (PVIB)
  • Key Feature: 13 isolated channels for vibration, proximity, and keyphasor inputs
  • Primary Field Use: Real-time vibration and shaft position monitoring for gas/steam turbines
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Description

Hard-Numbers: Technical Specifications

  • Protocol Support: Redundant IONet 10/100Mbps Ethernet
  • Port Count: 2× RJ45, 1× DC-37 field connector
  • Input Channels: 13 total (8 vibration, 4 proximity, 1 keyphasor)
  • Sensor Support: Proximitors, accelerometers (ch1-3), Velomitors
  • Isolation Rating: 2500 VAC RMS field-to-backplane
  • Probe Power: -24 VDC, 12 mA per channel
  • Power Requirements: 18–36 VDC, 4W max draw
  • Operating Temperature: -30°C to +65°C
  • Common-Mode Voltage: 5 VDC min
  • Frame Rates: 3.125, 6.25, 12.5, 25, 50, 100 Hz
  • Hazardous Rating: Class I Div 2, Zone 2
  • Weight: 0.80 kg
  • Dimensions: 158.75 × 107.95 × 30 mm
  • Firmware: Auto-reconfigurable from controller
IS220PDOAH1A

IS220PDOAH1A

The Real-World Problem It Solves

Generic I/O modules lack the signal conditioning and isolation needed for low-level vibration signals. They introduce noise and drift, leading to inaccurate machinery health data. provides dedicated, isolated signal paths for vibration and proximity probes, ensuring stable readings in high-electrical-noise environments.

Where you’ll typically find it:

  • Gas turbine shaft radial/bearing vibration monitoring
  • Steam turbine axial position and thrust protection
  • Compressor train critical speed and vibration analysis

Bottom line: delivers reliable, high-fidelity vibration data to meet API 670 and ISO 10816 machinery protection standards.

 

Hardware Architecture & Under-the-Hood Logic

is a self-contained processor module with isolated front-end signal conditioning. It processes raw sensor data independently before sending values to the main controller.

  1. Vibration/proximity signals enter 13 differential input channels.
  2. On-board DAC performs bias adjustment to center signals in the A/D range.
  3. Dedicated processor digitizes and filters raw waveforms.
  4. Calculates gap voltage, vibration amplitude, and phase relative to keyphasor.
  5. Dual Ethernet ports transmit processed data to the Mark VIe controller.
  6. Built-in diagnostics verify channel health and probe integrity.
  7. Configuration parameters auto-load from the controller on power-up.
IS220PDOAH1A

IS220PDOAH1A

Field Service Pitfalls: What Rookies Get Wrong

Probe Power Polarity ReversedSwapping ±24VDC probe power wires damages internal signal conditioning circuits. Results in dead channels and blown fuses.

  • Field Rule: Verify probe power polarity with a DMM before connecting; use color-coded wiring per GE drawing.

Inadequate Cable Shield GroundingGrounding shields at both ends creates ground loops that induce 50/60Hz noise, corrupting low-level vibration signals.

  • Quick Fix: Terminate shield only at the TVBA terminal board; leave the sensor end ungrounded.

Loose DC-37 Connector PinsUnder-torqued field connectors cause intermittent signal loss and false “Probe Fail” alarms during cabinet vibration.

  • Field Rule: Torque all connector screws to 0.5 N·m (4.4 lb·in); re-torque after initial 24-hour run-in.

 

Commercial Availability & Pricing Note

Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.

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