Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | VMIC / GE Fanuc |
| Model Number | VMIVME-2128 |
| Product Type | High Voltage Digital Output Board |
| Bus Interface | VMEbus |
| Form Factor | 6U VME |
| Output Channels | 128 digital outputs |
| Output Type | Open collector high-voltage sink outputs |
| Output Voltage Range | 5VDC to 48VDC |
| Maximum Breakdown Voltage | 55V |
| Output Current Capability | 600mA sink per channel |
| Protection Features | Surge current shutdown, thermal shutdown |
| Diagnostic Function | Built-in-Test (BIT) logic |
| Data Transfer | 8-bit / 16-bit / 32-bit VME access |
| Addressing | A16/A24 supervisory and non-privileged I/O mapping |
| Output Connectors | Two 96-pin female connectors |
| Compatible Loads | Relays, solenoids, lamps, electronic switches |
| Backplane Interface | VMEbus ANSI/IEEE STD 1014 |
| Front Panel Indicator | Fail LED |
Product Introduction
VMIC VMIVME-2128 Overview
The VMIC VMIVME-2128 is a 6U VMEbus high-voltage digital output board designed for systems requiring large numbers of discrete control points. It provides 128 output channels using high-current driver circuits for controlling external loads such as relays, solenoids, lamps, and industrial switching devices.
The GE Fanuc VMIVME-2128 includes built-in test functions, output protection features, and VMEbus compatibility for legacy industrial computer platforms. It remains relevant in long-life automation, test equipment, defense, and embedded control systems where maintaining existing VME architectures is required.
VMIVME-2128
Application Scenarios & Field Pitfalls (The Engineer’s Perspective)
Engineering Pain Point
A legacy VME control system continues running critical equipment, but one output rack begins showing intermittent actuator failures. Engineers often suspect the external device first. The actual problem may be a degraded output driver, incorrect load protection, or a failing I/O board.
The VMIVME-2128 directly switches field loads. When replacing this type of board, matching the part number is only the first step. Load voltage, wiring method, external protection, and VME software configuration all need verification.
Typical Applications
- Industrial Test Systems – Relay matrix control, automated test fixtures, and equipment simulation systems.
- Power Equipment Manufacturing – Discrete control of contactors, indicators, and switching devices.
- Transportation Systems – Legacy VME-based monitoring and control platforms.
- Industrial Automation Machines – Solenoid valves, lamps, actuators, and high-current discrete outputs.
Technical Pitfalls to Avoid
- Verify Output Load Requirements
The board supports high-current outputs, but each connected load must stay within driver specifications. Inductive loads require proper suppression to avoid repeated output failures.
- Check External Power Wiring
The VMIVME-2128 outputs are not isolated field power supplies. Confirm user voltage connections, grounding method, and P2 backplane options before energizing the system.
- Review VME Address Configuration
Legacy VME boards use jumper-based addressing. A replacement board with different address settings can conflict with existing system software.
Related Products
- GE VMIVME-2128A
Updated form-fit-function replacement for the . Provides the same 128-channel high-voltage digital output function for VME systems. - GE VMIVME-2170
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P2 power adapter accessory used to provide convenient field power and ground connections for compatible VME I/O boards. - GE VMIVME-4100 Series Controllers
VME-based processor platforms that can host VMIVME I/O modules in legacy automation architectures. - GE VMIVME-5567
Reflective memory communication board used in distributed VME control systems where synchronized data exchange is required. - GE VMIVME-7750
VME embedded computer module commonly used as a host processor in legacy VME automation and test systems.
