GE VMIVME-1150
GE VMIVME-1150
GE VMIVME-1150
GE VMIVME-1150
GE VMIVME-1150

GE VMIVME-3113A | 64-Channel 12-Bit VME Analog Input Board – Field Service Notes

  • Model: GE VMIVME-3113A
  • Alt. P/N: VMIVME3113A, 3113A-100
  • Product Series: GE Fanuc / Abaco VMIVME VME Analog I/O
  • Hardware Type: 6U single-width VMEbus 12-bit analog input (ADC) board
  • Key Feature: 64-channel differential/single-ended input with autoscan power-up mode (no software init)
  • Primary Field Use: High-density analog signal monitoring (temperature, pressure, flow) in turbine and BOP control systems
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Description

Hard-Numbers: Technical Specifications

  • Resolution: 12-bit bipolar analog-to-digital conversion
  • Channel Count: 64 configurable differential or single-ended inputs
  • Input Voltage Range: ±10mV to ±10V (jumper-selectable gain)
  • Conversion Time: 15μs per channel (max 33kHz throughput)
  • Input Impedance: 5MΩ (differential), 2MΩ (single-ended)
  • Onboard Memory: 64-word dual-port RAM for scan data storage
  • VME Interface: VMEbus Rev C.1, A16/A24, D08/D16/D32 slave
  • Operating Temperature: 0°C to +55°C (standard industrial)
  • Power Draw: 3.0A @ 5VDC, 15W nominal
  • Diagnostics: Live/Offline BIT, overvoltage protection, 5 low-pass filter options

GE VMIVME-1150

The Real-World Problem It Solves

Legacy systems often use multiple low-channel ADC cards, cluttering cabinets and increasing wiring complexity. Separate cards mean more points of failure and longer troubleshooting times.

Where you’ll typically find it:

  • Mark VI/VIe turbine control racks for exhaust temperature, bearing vibration, and lube oil pressure monitoring
  • Refinery process units with dense analog sensor arrays (pressure, level, flow transmitters)
  • Power plant balance-of-plant cabinets requiring high-channel-count data acquisition

Bottom line: It consolidates 64 analog inputs onto one VME card, reducing cabinet footprint and simplifying wiring while maintaining high noise immunity.

 

Hardware Architecture & Under-the-Hood Logic

This is a self-contained VME slave ADC with onboard scanning logic, reducing host CPU load.

  1. Analog field signals enter via front-panel terminals, pass through overvoltage protection and EMI filters.
  2. Jumper-configured gain amplifiers scale signals to the 12-bit ADC’s optimal range.
  3. A dedicated scan controller cycles through channels, digitizing each in 15μs and storing results in dual-port RAM.
  4. Autoscan mode runs continuously on power-up; VMEbus reads latest data directly from dual-port memory.
  5. Built-in test circuitry injects known reference voltages to verify conversion accuracy without field signal disconnects.
GE VMIVME-1150

GE VMIVME-1150

Field Service Pitfalls: What Rookies Get Wrong

Mixing Differential and Single-Ended WiringNew techs often run single-ended wiring to differential channels or vice versa. This ruins common-mode noise rejection, causing unstable readings in high EMI areas (near VFDs, motor starters).

  • Field Rule: Plan wiring per channel type; use twisted shielded pair for differential, single-shielded for single-ended; set jumpers accordingly.

Ignoring Gain Jumper SettingsTechs leave gain jumpers at default (×1) for low-level mV signals. This results in wasted resolution and noisy readings near zero.

  • Quick Fix: Match gain to signal range (×100 for ±10mV, ×10 for ±1V, ×1 for ±10V); verify with BIT reference readings.

Overloading VME Backplane PowerRacks with multiple high-density ADC cards (like this one) often hit 5V supply limits. Undervoltage causes intermittent scan freezes and BIT errors.

  • Field Rule: Calculate total 5V load (3A per card); use dedicated VME power supplies; avoid mixing with high-current I/O cards.

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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