MOTOROLA MVME-702

Description

Detailed Parameter Table

MOTOROLA MVME2100

Product Introduction

The Motorola MVME-702 is a legacy dual-function industrial module designed for critical I/O conversion and serial communication tasks in mid-20th-century automation systems, belonging to Motorola’s iconic MVME series—renowned for reliability in harsh industrial environments. As a dual-high 80mm Eurocard-format device, it integrates two core functionalities: Winchester cable termination logic (for seamless connectivity to legacy storage peripherals like hard drives) and six configurable serial channels, making it a versatile bridge between legacy hardware and modern control systems.

In automation setups, the Motorola MVME-702 acts as a “translation hub”: its Winchester termination logic ensures stable data transfer between vintage industrial computers and storage devices, while the six RS-232C/RS-422 channels enable communication with sensors, printers, and remote I/O nodes. With dedicated memory for applications and communication, it eliminates the need for separate I/O and serial modules, saving space in VME or Eurocard chassis. Today, it remains a critical component for maintaining legacy Motorola-based DCS/PLC systems, as it preserves compatibility with equipment that cannot be easily upgraded.

Core Advantages and Technical Highlights

Dual-Function Integration Saves Chassis Space

Unlike single-purpose I/O or serial modules, the Motorola MVME-702 combines Winchester cable termination and six serial channels in one dual-high Eurocard form factor. This integration reduces the number of required chassis slots by 50% compared to using separate modules—critical for space-constrained legacy systems (e.g., older factory control cabinets). For example, in a 1990s-era automotive assembly line, the Motorola MVME-702 can handle both hard drive data storage (via Winchester logic) and sensor data collection (via RS-422 channels) without crowding the chassis.

Configurable Serial Channels for Legacy Compatibility

Each of the Motorola MVME-702’s six serial channels can be independently configured as RS-232C (for short-range devices like local printers) or RS-422 (for long-distance, noise-immune communication with remote sensors up to 1200 meters away). This flexibility ensures compatibility with a wide range of legacy equipment—from 9600-baud RS-232C printers to 19.2 kbps RS-422 temperature sensors. The plug-in transceiver design also simplifies maintenance: if a channel fails, technicians can replace the transceiver without removing the entire module.

Wide-Range Power Input and Industrial Durability

The Motorola MVME-702’s 35–269 V AC wide-range power input makes it suitable for global industrial sites with inconsistent voltage supplies (e.g., factories in emerging markets or remote mining operations). Its 0°C–60°C operating temperature range and IEC 61000-6-2 EMC immunity ensure reliable performance in dusty, vibration-prone environments—far exceeding consumer-grade communication modules. The non-volatile memory also retains configuration data during power outages, avoiding time-consuming reconfiguration when systems restart.

Typical Application Scenarios

The Motorola MVME-702 excels in maintaining legacy automation systems where upgrading to modern hardware is impractical or cost-prohibitive. In a chemical plant still using a 1980s Motorola DCS, the Motorola MVME-702 serves as a critical link: its Winchester cable termination logic connects the DCS to a legacy hard drive for storing process logs, while two RS-422 channels collect data from pH sensors in reaction vessels (1 km away from the control room). A third RS-232C channel prints real-time pressure readings to a vintage industrial printer, ensuring compliance with regulatory record-keeping requirements.

In municipal water treatment facilities with aging Motorola PLCs, the Motorola MVME-702’s Remote I/O (RIO) port connects to pump status sensors, while its serial channels transmit data to a central SCADA system. The module’s wide power range also handles voltage fluctuations common in municipal electrical grids, preventing unexpected downtime. For users, the Motorola MVME-702 eliminates the need to replace entire systems—extending the lifespan of critical infrastructure by 5–10 years at a fraction of the cost of a full upgrade.

MOTOROLA MVME2100

Related Model Recommendations

Motorola MVME-709-1: Serial + Fiber-Optic Module. Complements the Motorola MVME-702 by adding fiber-optic ports (for longer-distance communication up to 2 km), ideal for extending the Motorola MVME-702’s serial data to remote sites.

Motorola MVME162-01: Basic Digital I/O Module. Expands the Motorola MVME-702’s I/O capacity with 16 discrete channels, suitable for systems needing more sensor/actuator control alongside the Motorola MVME-702’s serial functionality.

Motorola MVME5500-0161: High-Performance VME SBC. Serves as the host controller for the Motorola MVME-702, processing data from its serial/I/O ports and executing control logic in legacy VME systems.

Emerson RSTi-EP DIO: Modern Ethernet I/O Module. Replacement for the Motorola MVME-702 in systems migrating to Ethernet; offers similar I/O/serial features with Gigabit Ethernet connectivity.

Motorola FLN4234A: Ethernet Communication Module. Bridges the Motorola MVME-702 to modern networks, transmitting its serial data to cloud/SCADA systems via 4x Ethernet ports.

Motorola MVME-204A728-1: Analog I/O + Digital I/O Module. Adds analog signal conditioning to systems using the Motorola MVME-702, ideal for process control applications requiring both serial communication and analog sensor data.

Installation, Commissioning and Maintenance Instructions

Installation Preparation

Before installing the Motorola MVME-702, power off the Eurocard/VME chassis and disconnect the AC power supply (35–269 V AC) to avoid electrical shock. Verify the chassis has a compatible dual-high 80mm Eurocard slot and that the power supply can handle the module’s ~0.6 A current draw. Use an anti-static wristband and mat to protect the module’s memory and serial transceivers from ESD damage. Gather tools: Phillips-head screwdriver (for chassis mounting), torque wrench (0.5–0.8 N·m for terminal screws), and a multimeter (to test power/serial signals). Avoid installing near high-EMI equipment (e.g., variable-frequency drives) to prevent signal interference.

Maintenance Suggestions

For daily maintenance, inspect the Motorola MVME-702’s status LEDs monthly: ensure power LEDs are steady (not flickering) and serial channel LEDs blink during data transfer (indicating active communication). Clean the module quarterly with compressed air (low pressure) to remove dust from ports and connectors. If a serial channel fails, replace the plug-in transceiver (use Motorola-approved parts) instead of the entire module. Every 6 months, test the Winchester cable termination logic by verifying data transfer to a legacy hard drive. For power issues, check the AC input voltage (35–269 V AC) and replace the module’s internal fuse (if blown) with a 1 A slow-blow fuse.

Service and Guarantee Commitment

We stand behind the reliability of the Motorola MVME-702 with a 90-day warranty for all refurbished units, covering defects in serial communication, I/O functionality, and power regulation. Each refurbished Motorola MVME-702 undergoes 24-hour stress testing (including serial data transfer and temperature cycling) to ensure compliance with original Motorola industrial standards.

Our 24/7 technical support team provides guidance on installation, transceiver replacement, and compatibility with legacy systems. For long-term maintenance, we offer customized plans: quarterly remote diagnostics (to monitor the Motorola MVME-702’s serial/I/O performance) and semi-annual on-site inspections. We also maintain a stock of critical spare parts (e.g., RS-232C/RS-422 transceivers, fuses) for fast repairs, minimizing downtime in mission-critical legacy systems. For users transitioning to modern hardware, we provide free consultation to integrate the Motorola MVME-702 with Emerson’s RSTi-EP series, ensuring a seamless upgrade.