Description
VMIVME-M-485: Product Overview
The GE VMIVME-M-485 is a long-line repeater link module designed for VMEbus-based industrial automation systems. As a critical component of the VMIC长途线路中继链路子系列, it extends the communication distance of VMEbus systems by amplifying and repeating signals, ensuring reliable data transmission over long cables (up to several kilometers) in harsh industrial environments.
Role in Automation Systems:
Positioned as a “signal amplification and repetition hub” in VMEbus architectures, the VMIVME-M-485 performs two primary functions:
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Signal Amplification: Boosts weak VMEbus signals to compensate for attenuation over long cables, ensuring that signals reach distant nodes with sufficient strength.
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Signal Repetition: Repeats amplified signals to extend the communication distance beyond the standard VMEbus limit (typically 10 meters), enabling VMEbus systems to cover large industrial facilities (e.g., power plants, manufacturing plants).
Core Functionality:
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Long-Line Repeater: Designed to work with the VMIVME-Repeat-S-485 module (slave repeater), forming a complete long-line repeater link. The VMIVME-M-485 acts as the main repeater, while the VMIVME-Repeat-S-485 acts as the slave, extending the communication distance.
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Flexible Data Transfer: Supports 8-bit/16-bit data transfer via the VMEbus, allowing compatibility with various controllers and system configurations.
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VMEbus Compatibility: Conforms to VMEbus Rev. C.1, ensuring seamless integration with VME64 backplanes and controllers (e.g., GE Fanuc 90-30 series).
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Rugged Design: Industrial-grade components and a compact form factor make it suitable for harsh industrial environments (e.g., high temperature, vibration).
Platform Benefits (VMEbus Series):
The VMIVME-M-485 leverages GE’s VMEbus platform, which is renowned for:
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Reliability: Industrial-grade components and a rugged design ensure 24/7 operation in harsh environments.
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Scalability: Supports expansion with additional repeater modules to accommodate growing system demands (e.g., adding more nodes to a VMEbus network).
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Integration: Seamlessly integrates with VMEbus-based controllers and other I/O modules, reducing setup time and effort.
GE VMIVME-7700RC
Technical Specifications
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Model Number: VMIVME-M-485 (Variant of VMIC长途线路中继链路子系列)
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Manufacturer: GE (General Electric)
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Product Type: VMEbus Series Long-Line Repeater Link Module
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Series: VMEbus
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Bus Standard: VMEbus Rev. C.1 (supports 8/16/32-bit data transfer)
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Repeater Type: Main repeater module (works with VMIVME-Repeat-S-485 slave repeater)
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Supported Addressing: 16-bit/24-bit addressing
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Data Transfer Rates: 8-bit/16-bit (configurable via jumpers)
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Propagation Delay: ~400 ns (for 5-foot cable); +4 ns/ft (additional for longer cables)
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Operating Temperature: 0°C to +55°C (32°F to 131°F)
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Storage Temperature: -20°C to +85°C (-4°F to 185°F)
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Humidity: 5–95% non-condensing
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Dimensions: 160 mm × 100 mm × 20 mm (6.3 in × 3.9 in × 0.8 in) (standard VMEbus single-slot)
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Weight: 0.2 kg (0.44 lbs)
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Certifications: CE, UL (inferred from GE industrial product standards)
Core Features & Customer Value
1. Extended Communication Distance:
The VMIVME-M-485, when paired with the VMIVME-Repeat-S-485, extends the VMEbus communication distance from the standard 10 meters to several kilometers, enabling VMEbus systems to cover large industrial facilities. This is critical for applications like power plants, where turbines and control rooms are often located far apart.
2. Reliable Signal Transmission:
The module’s signal amplification and repetition functions ensure that VMEbus signals remain strong and clear over long distances, reducing the risk of data corruption or loss. This reliability is essential for maintaining the stability of industrial control systems.
3. Flexible Configuration:
Supports 8-bit/16-bit data transfer via jumpers, allowing compatibility with various VMEbus controllers and system configurations. This flexibility reduces the need for additional hardware changes, saving time and money during installation.
4. Rugged Industrial Design:
The module’s operating temperature range (0°C to +55°C) and compact form factor make it suitable for harsh industrial environments. Its DIN rail mounting option simplifies installation in crowded control cabinets, reducing setup time and effort.

GE VMIVME-7700RC
Typical Applications
The GE VMIVME-M-485 is widely used in industrial automation systems for:
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Power Generation:
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Extends VMEbus communication distance between turbines and control rooms in gas/steam power plants, enabling real-time monitoring and control of turbine operations.
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Manufacturing:
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Connects distant assembly lines and equipment in manufacturing plants, allowing centralized control and monitoring of production processes.
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Petrochemical Industry:
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Extends VMEbus communication distance in refineries and chemical plants, enabling reliable control of valves, pumps, and other equipment in hazardous environments.
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