Description

MVME712M I/O Transition Module

Name: MVME712/M Motorola Transition DCS Module PDF
Price: 2143 CNY
Availability: InStock

The MVME712M is an I/O transition module designed for Motorola’s families of processor modules, including MPU VMEmodules, VME Processor Modules, Embedded Controllers, and Single-Board Computers (SBCs)—collectively referred to as “MVMExxxx” throughout this documentation. Its core function is to act as an interface between MVMExxxx processor modules and their peripheral devices, with a primary goal of providing rear-panel industry-standard connectors to simplify customers’ external cabling requirements.

Core Working Principle

The MVME712M relies on a (supplied) P2 adapter board and cables for interconnection with MVMExxxx processor modules. The P2 adapter assembly serves as a signal routing hub: it extracts I/O signals and ground connections from the P2 connector on the VME chassis backplane (where the MVMExxxx module connects) and transmits these signals to the MVME712M. The MVME712M then distributes these signals to dedicated front-panel ports (e.g., serial, Ethernet, SCSI) for easy peripheral access.

Key Features of the MVME712M

The MVME712M integrates multiple connectivity and protection features to support diverse peripheral needs, including:

Four EIA-232-D Serial PortsImplemented with industry-standard DB-25 connectors on the front panel (signal routing via the P2 adapter). Each port can be configured for either EIA-232-D DTE (Data Terminal Equipment) or DCE (Data Circuit-terminating Equipment) mode using jumpers on the MVME712M.
Dedicated Peripheral Ports
- 1x Printer port (signal routing via the P2 adapter, for direct connection to printers).
- 1x Small Computer Systems Interface (SCSI) shielded connector (signal routing via the P2 adapter), supporting connections to both internal and external SCSI devices.
- 1x Ethernet port (front-panel mounted, for network connectivity).
Modem IntegrationRoutes EIA-232-D Port 2 signals to an internal modem, enabling direct modem connectivity without additional external cabling.
Status Indicators
- Green LED: Indicates active terminator power (for monitoring SCSI terminator functionality).
- Yellow LED: Indicates active transceiver power (for verifying transceiver operation).
Flexible SCSI TerminationSCSI terminating resistors are mounted in sockets, allowing configuration for either “end-of-cable” or “middle-of-cable” SCSI bus setups.
Environmental Protection
- Radio Frequency Interference (RFI) protection on the front panel: Reduces electromagnetic interference to ensure stable signal transmission.
- Electrostatic Discharge (ESD) protection on the front panel: Prevents damage from static electricity during handling or operation.

Key Features of the P2 Adapter Board

The MVME712M requires the use of the supplied P2 adapter board, which provides critical signal management and power support. Its features include:

Dual SCSI ConnectivityA dedicated connector that enables SCSI cable connections to:
1. Other external SCSI devices;
2. The MVME712M via a flat ribbon cable.
SCSI Termination SupportSCSI terminating resistors mounted in sockets (matching the MVME712M’s flexibility), supporting “end-of-cable” or “middle-of-cable” configurations for the SCSI bus.
Terminator Power SupplyGenerates terminator power from the +5 Vdc source on the P2 connector (chassis backplane) and includes a 1A fuse on the P2 adapter for overcurrent protection.
Unified Signal InterfaceA single connector that aggregates and transmits signals for EIA-232-D ports, the printer port, SCSI, and Ethernet to the MVME712M—simplifying the overall interconnection between the adapter, MVME712M, and MVMExxxx module.

MVME712/M PDF
MVME712 M

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