Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | MVME-701A |
| Manufacturer | Motorola |
| Product Category | 3U VMEbus Intelligent Communication Controller Module |
| Processor | MC68302 Integrated Multiprotocol Controller (IMP) |
| Communication Ports | 2 x RS-232C Ports, 1 x RS-422/485 Port |
| Data Transfer Rate | Up to 115.2 kbps per Port |
| Memory Configuration | 128 KB SRAM, 64 KB EPROM |
| VMEbus Interface | VMEchip1 Controller (Slave, 16/32-bit Data Bus) |
| Form Factor | 3U Eurocard (Single-slot VME Standard) |
| Operating Temperature Range | -40°C to +85°C |
| Power Requirements | 5V DC ±5%, ±12V DC ±10% |
| Protocol Support | RS-232C, RS-422, RS-485, Modbus RTU, ASCII |
| Diagnostic Features | Port Status LEDs, Loopback Testing, Error Counting |
Motorola MVME172PA-644SE
Product Introduction
The **Motorola MVME-701A** is a versatile 3U VMEbus intelligent communication controller module engineered for reliable data transmission in industrial automation systems. As a key member of Motorola’s MVME700 series, it leverages the MC68302 Integrated Multiprotocol Controller (IMP) to manage multiple serial communication ports, enabling seamless connectivity between host CPUs and distributed peripheral devices in mission-critical applications.
Equipped with 128 KB SRAM for data buffering and 64 KB EPROM for firmware storage, the **Motorola MVME-701A** ensures efficient handling of serial data streams while supporting on-module program execution. Its combination of 2 RS-232C ports and 1 RS-422/485 port caters to both short-distance and long-distance communication needs, with software-configurable protocols and data rates. The VMEchip1 interface facilitates easy integration into VMEbus-based control systems as a slave device, ensuring real-time data exchange with host processors. With a wide operating temperature range of -40°C to +85°C, this module delivers consistent performance in harsh industrial environments.
Core Advantages & Technical Highlights
Multiprotocol Communication Flexibility: The **Motorola MVME-701A** supports a range of serial protocols including Modbus RTU and ASCII, making it compatible with diverse industrial devices such as PLCs, HMIs, and sensor networks. Its mix of RS-232C (for local devices) and RS-422/485 (for long-distance, noise-immune communication) ports allows flexible system design, eliminating the need for additional protocol converters.
Intelligent Data Handling: The MC68302 IMP processor offloads communication tasks from the host CPU, independently managing data buffering, protocol framing, and error detection. This frees up the host’s processing resources for core control functions, enhancing overall system efficiency even under moderate communication loads.
Industrial-Grade Durability: Designed to operate in -40°C to +85°C environments, the **Motorola MVME-701A** withstands extreme temperatures, vibration, and electromagnetic interference (EMI) common in manufacturing plants, power stations, and transportation systems. Its rugged construction ensures stable communication performance in unconditioned or harsh operating spaces.
Easy VMEbus Integration: The VMEchip1 interface supports both 16-bit and 32-bit VMEbus data transfers, enabling compatibility with legacy and modern VMEbus systems. As a slave device, it responds quickly to host commands, ensuring timely data transmission and reception for time-sensitive control applications.
Built-In Diagnostics: Port status LEDs, loopback testing, and error counting features simplify troubleshooting and maintenance. Users can visually monitor port activity, verify communication links via loopback tests, and track error rates to proactively identify issues, minimizing downtime and improving system availability.
Typical Application Scenarios
Industrial Control Networks: In food and beverage processing facilities, the **Motorola MVME-701A** connects distributed temperature sensors (via RS-485) and local HMI panels (via RS-232C) to the host PLC. It uses Modbus RTU to transmit real-time sensor data to the host, enabling centralized monitoring of refrigeration units and production lines. The module’s EMI resistance ensures reliable communication near high-power machinery.
Building Automation Systems: In large commercial buildings, the **Motorola MVME-701A** integrates HVAC controllers, access control panels, and lighting systems. The RS-422/485 port links to remote HVAC units across the building, while RS-232C ports connect to local control panels. It exchanges status data and control commands using ASCII protocol, enabling centralized management of building services and energy optimization.
Transportation Infrastructure: In railway signaling systems, the module connects trackside sensors (e.g., axle counters) via RS-485 for long-distance communication and transmits data to the central traffic management system. Its rugged design withstands vibration and temperature fluctuations in railway yards, ensuring consistent signal transmission for safe train operation.
Remote Monitoring Stations: In oil and gas pipeline monitoring, the **Motorola MVME-701A** collects data from pressure and flow sensors at remote pump stations via RS-485. It buffers data in SRAM before transmitting it to the central SCADA system via RS-232C, ensuring data integrity even in areas with intermittent communication links.
Motorola MVME172PA-644SE
Related Model Recommendations
Motorola MVME-709-1: High-density serial module with 8 ports, suitable for scaling up communication networks from **Motorola MVME-701A**.
Motorola MVME-162-01: 3U VMEbus CPU module compatible with **Motorola MVME-701A**, serving as the host for communication data processing.
Motorola MVME-172PA-644SE: Analog input module paired with **Motorola MVME-701A** to add precision data acquisition capabilities to communication systems.
GE VMIVME-7650: Digital I/O module complementary to **Motorola MVME-701A**, enabling discrete control alongside serial communication.
Motorola MVME-2300: Ethernet gateway module, working with **Motorola MVME-701A** to bridge serial devices to Ethernet-based industrial networks.
Motorola MVME-197LE: Memory expansion module for host CPUs, increasing storage for datasets transmitted by **Motorola MVME-701A**.
Installation & Maintenance Guidelines
Installation Preparation: Before installing the **Motorola MVME-701A**, ensure the VMEbus chassis is powered off and properly grounded. Align the module with the 3U slot guides, verifying P1/P2 backplane connector alignment. Gently insert until fully seated, then fasten front-panel screws to prevent vibration-induced disconnections. For wiring, use shielded cables for RS-422/485 ports and ensure proper termination (120Ω resistor) at the end of the bus; route RS-232C cables away from high-voltage lines to minimize interference.
Maintenance Best Practices: Perform quarterly inspections to clean dust from connectors and front-panel components using compressed air. Regularly check port status LEDs to monitor communication activity and identify abnormal conditions. Use loopback testing monthly to verify port functionality. Back up EPROM firmware annually to prevent data loss during updates. When replacing cables, use industry-standard shielded cables to maintain communication reliability. Use only genuine Motorola spare parts to ensure VMEbus compatibility and performance.
Service & Warranty Commitment
The **Motorola MVME-701A** is backed by a 2-year manufacturer’s warranty covering defects in materials and workmanship under normal industrial operation. Motorola’s technical support team provides professional assistance via email and phone, with response times within 24 hours for critical issues and 48 hours for general inquiries. We offer remote diagnostic services to troubleshoot communication problems, minimizing on-site service costs. For legacy systems, we provide firmware update and module repair services to extend product lifecycle. Our commitment to quality ensures that the **Motorola MVME-701A** delivers consistent, reliable communication, protecting your investment in industrial automation infrastructure.
