Vmic VMIVME-4900

Technical Dossier

Product Details And Specifications

VMIC VMIVME Series Technical Notes

The VMIC VMIVME series represents one of the most widely deployed VMEbus-based I/O and signal processing platforms in global heavy industry. Installed across petrochemical refineries, nuclear power generation facilities, offshore platforms, and continuous-process chemical plants, VMIVME modules operate as the backbone of legacy distributed control systems (DCS) and programmable logic controller (PLC) architectures. Their 6U VMEbus form factor, compliance with IEEE 1014-1987, and deterministic real-time performance made them the preferred choice for safety-critical and high-availability applications throughout the 1980s, 1990s, and into the 2000s. Many installations remain operational today, creating sustained demand for spare parts, repair services, and lifecycle extension support.

The Evolution of VMIVME Architecture

VMIC (VME Microsystems International Corporation) introduced the VMIVME product line to address the need for high-density, high-accuracy analog and digital I/O within the VMEbus ecosystem. Early modules such as the VMIVME-1182 and VMIVME-2120 established the platform's reputation for precision analog input with 16-bit resolution and low-noise signal conditioning. As industrial automation requirements evolved, VMIC expanded the series to include resolver-to-digital converters (VMIVME-4900, VMIVME-4512), high-speed digital I/O (VMIVME-2510, VMIVME-2540), and multi-function communication adapters.

VMIVME Full Catalog & Functionalities (SKU List)

The following SKUs represent the core VMIVME module range, categorized by functional type. All models listed are genuine VMIC/GE VMIVME series components.

Resolver-to-Digital / Signal Conversion

• VMIVME-4900: 4-channel resolver-to-digital converter board; 16-bit resolution; supports synchro and resolver inputs for position feedback in servo and motion control systems.
• VMIVME-4512: 12-channel resolver/synchro-to-digital converter; programmable bandwidth; used in multi-axis turbine and compressor control.

Analog Input Modules

• VMIVME-3113: 64-channel, 12-bit analog input module; single-ended; 100 kHz aggregate throughput; standard process monitoring applications.
• VMIVME-3122: 64-channel, 16-bit high-resolution analog input; differential inputs; used in precision measurement and laboratory-grade data acquisition.
• VMIVME-3113A: Enhanced variant of VMIVME-3113 with extended temperature range and improved EMI shielding for harsh industrial environments.
• VMIVME-1182: 8-channel, 16-bit analog input with programmable gain amplifier (PGA); suited for low-level sensor signals including thermocouples and strain gauges.

Analog Output Modules

• VMIVME-4116: 16-channel, 16-bit analog output; voltage and current output modes; used for setpoint generation in process control loops.
• VMIVME-4140: 32-channel, 12-bit analog output; high-density configuration for large-scale DCS output marshalling.

Digital Input/Output Modules

• VMIVME-2120: 32-channel optically isolated digital input; 24 VDC logic; standard field I/O for discrete process signals.
• VMIVME-2510: 32-channel TTL-compatible digital I/O; bidirectional; programmable direction per channel; used in high-speed logic interfacing.
• VMIVME-2540: 64-channel digital I/O; 24 VDC; supports both sourcing and sinking configurations; high-density discrete control.
• VMIVME-2532: 32-channel isolated digital output; relay-driven; rated for inductive loads; used in motor starter and valve actuator control.
• VMIVME-2536: 64-channel digital output; open-collector; 500 mA per channel; suitable for solenoid and indicator lamp driving.

Counter / Timer / Encoder Modules

• VMIVME-5565: Reflective memory network interface module; high-speed shared memory over fiber optic ring; used for real-time inter-node data sharing in redundant DCS architectures.
• VMIVME-7589: 8-channel incremental encoder interface; quadrature decoding; 32-bit position registers; used in precision positioning and web tension control.

Communication & CPU Modules

• VMIVME-7697: Single-board computer (SBC); PowerPC processor; VxWorks and LynxOS compatible; serves as the VMEbus system controller in VMIC-based DCS nodes.
• VMIVME-7750: Ethernet and serial communication module; supports Modbus RTU/TCP, PROFIBUS DP; used for DCS-to-SCADA data bridging.
• VMIVME-6015: Dual-port RAM interface module; 1 MB shared memory; enables high-bandwidth data exchange between VMEbus masters in multi-processor configurations.

Sourcing Hard-to-Find & Obsolete VMIVME Parts

The VMIVME series entered end-of-life (EOL) status progressively between 2008 and 2016 under GE Intelligent Platforms. Replacement announcements directed users toward GE's VMICPCI and PACMotion platforms. However, the cost and complexity of migrating safety-instrumented systems, combined with the long operational lifespans of heavy industrial plant (20–40 years), means that original VMIVME hardware remains in active service globally.

Quality Control for the VMIVME Range

VMIVME modules present specific test challenges due to their multi-layer backplane connectors (P1/P2 VMEbus), precision analog front-ends, and in some cases fiber optic interfaces (VMIVME-5565). DriveKNMS applies a structured test protocol for each module type:

• Visual inspection: PCB condition, capacitor health, connector pin integrity, and evidence of prior repair or counterfeit components.
• Backplane bus test: VMEbus address/data line continuity and termination verification using a dedicated VMEbus analyzer.
• Functional burn-in: Each module is operated in a live VMEbus chassis under representative load conditions for a minimum of 24 hours.
• Analog accuracy verification: For analog I/O modules, all channels are tested against calibrated reference sources. Gain, offset, and linearity errors are measured and documented.
• Resolver interface test: VMIVME-4900 and VMIVME-4512 units are tested with a calibrated resolver simulator across the full angular range (0°–360°) at multiple speeds to verify tracking accuracy and error output.
• Communication interface test: SBC and communication modules are tested for Ethernet, serial, and shared memory functionality under protocol-specific test suites.