MOTOROLA MVME705B 6-Channel Serial Transition Module

MOTOROLA MVME705B 6-Channel Serial Transition Module

Introduction

The MOTOROLA MVME705B is a high-density 6-Channel Serial Transition Module designed for the VMEbus ecosystem.

It primarily serves as the rear-panel interface for VME single-board computers (SBCs), such as the MVME332XT and other serial communication controllers.

By converting internal system signals into accessible external ports, the MVME705B facilitates robust,

multi-channel serial data exchange in complex industrial and telecommunications environments.

Technical Parameter Table

MVME705B

Related Models

MVME705-1: Similar 6-channel variant often used with MVME333-2 cards.

MVME712M: Transition module featuring SCSI and Ethernet interfaces.

MVME332XT: The Intelligent Communication Controller typically paired with the MVME705 series.

MVME162 / MVME172: VME CPU boards that utilize these transition cards for I/O expansion.

Application Cases

Telecommunications Infrastructure: Used in Meridian 1 and other legacy switching systems to manage Application Module Links (AML).

Power Plant Monitoring: Acting as a serial data hub for connecting multiple field sensors to a central VME processing unit.

Aerospace Data Logging: Deployed in ground-based simulation racks for high-speed serial telemetry.

Factory Automation: Interfacing legacy CNC machinery with modern SCADA systems via stable RS-232/RS-422 protocols.

Product Advantages and Features

Six-Channel Capacity: Efficiently manages six independent serial streams through a single VME rear slot.

Software-Triggered Abort: Features an ABT (Abort) switch logic that can generate interrupt signals (IRQ8*) to the processor, essential for debugging and emergency halts.

Integrated Circuit Logic: Built with high-quality ICs designed for long-term stability and resistance to signal noise.

Enhanced Cable Management: By utilizing a Rear Transition Module (RTM), all bulky serial cabling is moved to the back of the rack, leaving the front clear for CPU maintenance.

Universal Serial Support: Capable of handling various serial protocols depending on the host controller card’s configuration.

Other Models in the Same Series

MVME701 (Basic Transition Board)

MVME707 (Serial/Parallel Combo Module)

MVME715P (High-Density Transition Module)

MVME333-2 (XCC Communication Card)

Installation and Maintenance

Installation: Align the MVME705B with the corresponding rear slot of the VME chassis (directly behind the host serial controller).

Ensure the DIN connectors are clean and seat the module firmly before tightening the captive screws.

Grounding: To minimize shock hazards and signal interference, ensure the equipment chassis is connected to a common electrical safety ground.

Maintenance: This module is largely passive; however, periodic inspection of the DB-25 pins for oxidation and ensuring the ABT switch is free of dust is recommended for mission-critical applications.

Unique Product Description

The MOTOROLA MVME705B represents the peak of VMEbus modularity. Designed for engineers who require reliable,

multi-port serial communication without sacrificing rack space,

the MVME705B bridges the gap between sophisticated internal processing and rugged field-side connectivity.

Whether it’s managing a “Digital Ship” automation system or a legacy power grid,

this module remains a vital component for maintaining 24/7 operational integrity in serial-heavy environments.