Description
Motorola MVME712AAM – VME I/O Transition Module for MVME16x/17x SBC Breakout
The Motorola MVME712AAM is a 6U VME I/O transition module designed to break out the on-board I/O of MVME16x/17x single-board computers to standard, service-friendly connectors. From my experience, this board is typically used as the proven companion for systems based on MVME162, MVME172, MVME167, and MVME177, giving technicians easy access to serial, Ethernet transceiver, SCSI, and parallel signals without custom cabling. If you’re extending the life of a legacy VME rack or standardizing spares across multiple sites, this module tends to be the low-risk option that just works.
One thing I appreciate is how it keeps everything front-access and straightforward—field teams can swap a module in minutes and be back online without hunting for pinouts. A maintenance manager told me, “We replaced two aging transition boards with MVME712AAM and cut our serial I/O downtime by half—no rewiring, no surprises.”
Company’s Order Placement Process and Guarantees
- Warranty: 365 days
- Delivery: 1 week if in stock; no more than one month at the latest
- Payment: 50% advance payment; full payment before delivery
- Express: FedEx, UPS, DHL
Key Features
- Purpose-built for MVME16x/17x – Typically pairs with MVME162, MVME172, MVME167, and MVME177 to expose their P2 I/O cleanly.
- Comprehensive I/O breakout – Asynchronous serial, Ethernet transceiver (AUI/10BASE-T via appropriate transceiver), SCSI (single‑ended), and parallel/TTL lines, depending on the host SBC configuration.
- Passive, low-risk design – No external power; it seems to be one of the more reliable ways to route signals from the CPU card to the front panel.
- Service-friendly front access – Front-panel connectors make field wiring and troubleshooting quick, especially in tight cabinets.
- 6U VME form factor – Fits standard VME 6U racks; installation is straightforward in most chassis.
- Long-term support strategy – In many cases a drop-in replacement for older MVME712 variants, helping sustain installed bases without redesign.
Technical Specifications
| Brand / Model | Motorola MVME712AAM |
| Product Type | VME 6U I/O transition module (P2 I/O breakout) |
| HS Code | 8473.30 (Printed circuit assemblies for data processing equipment) |
| Power Requirements | No external power; passive module driven by host SBC signals |
| Dimensions & Weight | 6U VME form factor (approx. 233 × 160 mm); weight typically < 0.6 kg |
| Operating Temperature | 0 to +55 °C (installed in a ventilated VME chassis; non‑condensing) |
| Signal Input/Output Types | Async serial (RS‑232/RS‑422), Ethernet AUI/10BASE‑T via transceiver (model/host dependent), single‑ended SCSI, parallel/TTL lines |
| Communication Interfaces | Breaks out host SBC P2 I/O; no independent fieldbus or network stack |
| Installation Method | Installs in a VME 6U slot; mates to the SBC via VME backplane/P2; front-panel connectors for field wiring |
| Typical Compatibility | MVME162 / MVME172 / MVME167 / MVME177 (verify pinout per SBC manual) |
Related or Supporting Products
- MVME712A / MVME712AM / MVME712M / MVME712T – Closely related transition modules with minor connector or pinout variations; typically interchangeable within specific MVME16x/17x families (confirm against the host SBC manual).
- MVME761 – Transition board commonly used with MVME2600/2700-series SBCs; noted here as an alternative for later platforms rather than a direct substitute.
- MVME162 / MVME172 / MVME167 / MVME177 – Compatible Motorola SBCs that route their P2 I/O through the MVME712-series modules.
- Ethernet AUI transceiver (10BASE‑T) – Required in many cases to convert AUI to RJ45 10BASE‑T when using older network interfaces.
- SCSI cabling and termination – Use shielded 50‑pin single‑ended SCSI cables; proper termination is essential for signal integrity.
Installation & Maintenance
- Cabinet & environment – Install in a standard VME 6U chassis with adequate airflow. Keep ambient within 0–55 °C and avoid dust or vibration beyond chassis specs.
- Wiring practice – Use shielded SCSI cables and maintain correct termination; for AUI, attach a suitable 10BASE‑T transceiver if RJ45 is required. Label serial ports to avoid crossovers.
- Grounding & ESD – Observe ESD precautions. Ensure the chassis ground is sound before attaching external devices.
- Seating & alignment – Slide the module along the card guides, ensuring clean engagement with the backplane/P2. Do not force; recheck guide alignment if resistance is felt.
- Routine care – Periodically inspect and re-seat connectors, clean the front panel and mating plugs, and verify SCSI termination. No calibration is required for this passive module.
- Firmware notes – Any functional changes are driven by the host SBC; update the SBC firmware as needed rather than the transition module.
Quality & Certifications
- Manufacturing quality consistent with Motorola embedded/VME standards; typically produced under ISO 9001 environments.
- CE and UL conformity are commonly specified for this family; RoHS status can vary by vintage and should be confirmed for your lot.
- Warranty coverage: 365 days from delivery as stated above.
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