Motorola MVME-204A728-1

Description

Detailed Parameter Table

Motorola MVME-620

Product Introduction

The **Motorola MVME-204A728-1** is a high-flexibility 3U VMEbus serial communication module designed for industrial automation systems requiring multiple and versatile serial connections. As a key member of Motorola’s MVME200 series, it integrates 4 software-configurable RS-232C/422/485 serial ports, providing a comprehensive solution for connecting serial-based sensors, actuators, HMI devices, and remote monitoring systems in mission-critical industrial environments.

With a wide data rate range (300 bps to 115.2 kbps) and support for various parity, data bit, and stop bit configurations, the **Motorola MVME-204A728-1** adapts to diverse serial communication protocols. Its 2500V AC isolation between ports and the backplane ensures robust protection against electrical noise and ground loops, enhancing system reliability. The VMEchip1 interface enables seamless integration into VMEbus-based control systems as a slave device, facilitating real-time data exchange with host CPUs. Designed to operate in -40°C to +85°C environments, this module delivers consistent performance in harsh industrial settings.

Core Advantages & Technical Highlights

Multi-Port Configurable Serial Connectivity: Featuring 4 independently software-configurable RS-232C/422/485 ports, the **Motorola MVME-204A728-1** eliminates the need for multiple single-port modules, reducing chassis space and cabling complexity. Each port can be tailored to specific communication requirements, supporting both short-distance (RS-232C) and long-distance (RS-422/485) serial links—ideal for distributed industrial systems.

High Isolation & Robust Protection: 2500V AC isolation between each port and the backplane prevents electrical interference from affecting communication signals, ensuring stable data transmission in high-noise industrial environments. Overvoltage protection safeguards the module from voltage spikes, extending its operational lifespan and reducing maintenance costs.

Flexible Communication Parameters: The module supports a wide range of communication parameters, including data rates up to 115.2 kbps, multiple parity options, and configurable data/stop bits. This flexibility allows it to interface with a broad spectrum of legacy and modern serial devices, from basic sensors to complex HMI panels.

Industrial-Grade Durability: Operating from -40°C to +85°C, the **Motorola MVME-204A728-1** withstands extreme temperatures, vibration, and electromagnetic interference (EMI) common in manufacturing plants, oil refineries, and transportation systems. Its rugged construction and high-quality components ensure long-term stable operation, minimizing unplanned downtime.

Seamless VMEbus Integration: The VMEchip1 controller supports 16-bit VMEbus data transfers, ensuring compatibility with legacy VMEbus systems. As a slave device, it responds promptly to host commands, enabling timely data transmission and reception for real-time control applications.

Typical Application Scenarios

Distributed Manufacturing Control: In automotive assembly plants with distributed control nodes, the **Motorola MVME-204A728-1** connects multiple RS-485-based sensors (e.g., proximity sensors, temperature sensors) across the production line. Each port is configured for RS-485 to enable long-distance communication, and the module transmits sensor data to the host CPU via the VMEbus. Port status LEDs simplify on-site troubleshooting of communication issues.

Remote Monitoring Systems: In water treatment facilities, the module interfaces with RS-232C-based remote terminal units (RTUs) that monitor pump status, water level, and chemical concentrations. Configured for RS-232C, the ports connect to RTUs in different plant sections, and the module relays monitoring data to the central control system. Overvoltage protection safeguards the module from electrical surges in wet industrial environments.

Industrial HMI Networking: In food processing plants, the **Motorola MVME-204A728-1** connects multiple RS-422-based HMI panels located at different production stations. The RS-422 configuration supports noise-free communication over moderate distances, allowing operators to monitor and control equipment from various locations. Flexible flow control ensures smooth data exchange between the HMI panels and the host CPU.

Legacy Equipment Retrofit: In retrofitting older textile mills, the module replaces obsolete serial communication cards, providing 4 configurable ports to connect legacy RS-232C motor drives and new RS-485 sensors. This eliminates the need to replace existing equipment, reducing retrofit costs while enhancing system connectivity and data collection capabilities.

Motorola MVME-620

Related Model Recommendations

Motorola MVME-206A: Higher-port serial communication module with 8 ports, ideal for scaling up systems from **Motorola MVME-204A728-1**.

Motorola MVME-162-22: Entry-level 68030-based SBC compatible with **Motorola MVME-204A728-1**, serving as the host for serial data processing and control.

Motorola MVME-372: Low-density digital I/O module, working with **Motorola MVME-204A728-1** to add discrete input/output capabilities for system control.

GE VMIVME-7650: Analog I/O module complementary to **Motorola MVME-204A728-1**, adding analog data acquisition for temperature or pressure monitoring alongside serial communication.

Motorola MVME-701A: Serial communication module with RS-422/485 ports, used with **Motorola MVME-204A728-1** to extend long-distance serial connectivity.

Motorola MVME-605: Next-generation PowerPC SBC, pairing with **Motorola MVME-204A728-1** for upgraded control systems requiring higher processing power for serial data analysis.

Installation & Maintenance Guidelines

Installation Preparation: Before installing the **Motorola MVME-204A728-1**, 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 twisted-pair cables for RS-422/485 ports and standard serial cables for RS-232C ports; ensure proper termination for RS-485 networks.

Maintenance Best Practices: Perform quarterly inspections to clean dust from connectors and front-panel status LEDs using compressed air. Regularly check port status LEDs to identify Tx/Rx activity and potential communication issues. Test each port monthly by connecting a known serial device and verifying data transmission. Ensure power supply voltages (5V ±5%, ±12V ±10%) are stable to prevent communication errors. Use only genuine Motorola spare parts to maintain VMEbus compatibility and serial communication performance.

Service & Warranty Commitment

The **Motorola MVME-204A728-1** 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. We offer remote diagnostic services to troubleshoot serial communication problems, minimizing on-site service costs. For legacy systems, we provide repair and configuration services to extend product lifecycle. Our commitment to quality ensures that the **Motorola MVME-204A728-1** delivers consistent, reliable serial communication performance, protecting your investment in industrial automation infrastructure.