The Motorola MVME 374-1 operates as the processing core within VMEbus-based systems, leveraging a robust microprocessor architecture optimized for real-time task execution. Its design centers on balancing computational performance with low latency—critical for applications like motion control or closed-loop process regulation where split-second decisions prevent costly errors.
Model Number MVME 374-1
Brand Motorola
Type VMEbus Single-Board Computer (SBC)
Processor Motorola 68040 (33 MHz)
Memory 16 MB DRAM (expandable to 64 MB), 2 MB Flash
Operating Temp Range 0°C to 60°C (32°F to 140°F)
Mounting Style 6U VMEbus Chassis (3HE height)
Dimensions 233.7mm x 160mm (9.2″ x 6.3″)
Weight 350g (12.3 oz)
Interface/Bus VMEbus (32-bit, 40 MB/s), RS-232, parallel port
Compliance CE, UL 1950, FCC Class A
Supported Protocols Modbus (via software), CANopen (with add-on module)
Typical Power Draw 12W (max 15W under load)
The Motorola MVME 374-1 operates as the processing core within VMEbus-based systems, leveraging a robust microprocessor architecture optimized for real-time task execution. Its design centers on balancing computational performance with low latency—critical for applications like motion control or closed-loop process regulation where split-second decisions prevent costly errors.
MVME 374-1
Unlike generic computing boards, the Motorola MVME 374-1 integrates specialized I/O interfaces that support legacy industrial protocols, allowing it to communicate with older sensors, actuators, and human-machine interfaces (HMIs) while also connecting to newer Ethernet-based networks via optional bridges. This dual compatibility places it at the intersection of legacy and modern systems, enabling it to act as a translator that preserves existing infrastructure investments while facilitating gradual upgrades. The board’s VMEbus interface ensures it slots seamlessly into standard 6U VME chassis, making it a drop-in replacement for aging modules without requiring extensive reengineering of the host system.
MVME 374-1
Technical specifications:
Model Number MVME 374-1
Brand Motorola
Type VMEbus Single-Board Computer (SBC)
Processor Motorola 68040 (33 MHz)
Memory 16 MB DRAM (expandable to 64 MB), 2 MB Flash
Operating Temp Range 0°C to 60°C (32°F to 140°F)
Mounting Style 6U VMEbus Chassis (3HE height)
Dimensions 233.7mm x 160mm (9.2″ x 6.3″)
Weight 350g (12.3 oz)
Interface/Bus VMEbus (32-bit, 40 MB/s), RS-232, parallel port
Compliance CE, UL 1950, FCC Class A
Supported Protocols Modbus (via software), CANopen (with add-on module)
Typical Power Draw 12W (max 15W under load)
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Main features and advantages:
Choosing the Motorola MVMEMVME 374-1 delivers tangible benefits that extend beyond basic processing capabilities. Its legacy compatibility is a key advantage for organizations with mature industrial systems, eliminating the need for costly full-system overhauls. By acting as a bridge between older VME-based hardware and modern control networks, the Motorola MVME 374-1 allows for phased upgrades, where critical components can be updated incrementally while preserving operational continuity. This approach reduces downtime and engineering costs, as teams avoid the disruption of replacing entire systems at once.
The board’s rugged design also ensures long-term reliability in industrial settings. Engineered to withstand the vibration and temperature fluctuations common in factory floors or power plants, the Motorola MVME 374-1 minimizes unplanned outages—critical for applications where downtime can cost thousands per hour. Its low power consumption further enhances operational efficiency, reducing heat output and extending the life of cooling systems in enclosed chassis. For engineers managing legacy infrastructure, these features translate to lower total cost of ownership and extended system lifespans.
Application areas:
The Motorola MVME 374-1 excels in applications where legacy system continuity is paramount. In manufacturing, it’s a staple in older automotive assembly lines, where it controls robotic welding arms and conveyor systems—equipment that remains reliable but requires a processing core compatible with 1990s-era VME architectures. Its ability to run real-time operating systems (RTOS) like VxWorks ensures that time-critical tasks, such as precision motion control, execute without latency.
In power generation, the Motorola MVME 374-1 manages auxiliary systems in coal-fired or hydroelectric plants, regulating pumps, valves, and monitoring sensors. These facilities often retain VME-based control systems for their proven durability, and the Motorola MVME 374-1 provides the processing power needed to keep these systems operational while enabling data sharing with newer SCADA platforms via protocol converters.
Transportation systems, including railway signaling and traffic management networks, also rely on the Motorola MVME 374-1. Its rugged design withstands the vibration of rail environments, while its compatibility with legacy communication protocols ensures that signaling logic—often written decades ago—continues to run without modification, preserving safety-critical operations.
Related products:
MVME 372-1 – Lower-cost variant with reduced memory (8 MB DRAM) for less demanding tasks.
MVME 374-2 – Enhanced version with 68060 processor (50 MHz) for higher computational throughput.
MVME 3100 – Next-generation VME SBC with PowerPC processor, ideal for upgrading from MVME 374-1.
MVME 366 – Analog/digital I/O companion module for MVME 374-1 in process control applications.
MVME 712M – Single-slot VMEbus memory module to expand MVME 374-1’s DRAM capacity.
MVME 162-22 – Legacy VME CPU module, predecessor to MVME 374-1, still used in some fossil fuel plants.
MVME 5500 – Modern VME-to-Ethernet bridge, enabling MVME 374-1 to connect to IP networks.
MVME 374-1-R – Refurbished version of MVME 374-1, certified for reuse in non-critical applications.
Installation and maintenance:
Installing the Motorola MVME 374-1requires attention to VMEbus compatibility: verify that the host chassis supports 32-bit VME operations and that the backplane voltage (typically +5V, +12V, -12V) matches the module’s requirements. Check for sufficient cooling in the chassis—while the MVME 374-1 has low heat output, adjacent high-power modules can raise ambient temperatures beyond its 60°C limit. Before installation, confirm that the system firmware (if applicable) recognizes the MVME 374-1 ; older chassis may require a BIOS update to enable full functionality.
For ongoing maintenance, perform quarterly visual inspections of the board’s edge connectors for signs of corrosion or wear—common in industrial environments with high humidity. Clean connectors with isopropyl alcohol and a soft brush if needed, taking care to avoid bending pins. Monitor system logs for memory errors, which may indicate failing DRAM chips—replaceable via Motorola service kits. Annual functional testing is recommended: run diagnostic software to verify processor performance, I/O functionality, and bus communication, ensuring the module remains reliable in critical applications. Avoid exposing the Motorola MVME 374-1 to static discharge during handling; always use grounded wrist straps when servicing.
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