Description
1. At-A-Glance Executive Brief
- Model: MVME51105E-2161
- Brand: Motorola / Emerson
- Part Type: VMEbus Single Board Computer (SBC)
- Lifecycle Status: Legacy / Obsolete (Active repair and surplus channels supported)
- System Compatibility: VME64 backplanes, MVME712M and MVME761 transition modules
- Core Protocol: VMEbus ANSI/VITA 1-1994, 10/100Base-TX Ethernet
2. Technical Introduction
Unexpected failures in aging legacy VMEbus industrial systems often trigger severe downtime, while sourcing unverified secondhand boards risks silent memory errors or backplane bus contention. Plant operators facing sudden processor lockups on critical legacy lines cannot afford protracted control system migrations or weeks of troubleshooting uncalibrated hardware. The Motorola MVME51105E-2161 drops directly into existing VME chassis slots to restore operational integrity, utilizing an integrated PowerPlus II PCI bridge-memory architecture and a 400 MHz PowerPC processor to maintain precise control timing loops without requiring software rewrites.
3. Core Technical Specifications
| Parameter | Value |
| Microprocessor | MPC7410 400 MHz PowerPC |
| Level 1 Cache | 32KB Instruction / 32KB Data |
| Level 2 Cache | 2MB Secondary Backside Cache |
| Main Memory | 512MB On-board ECC SDRAM (100 MHz bus) |
| Flash Memory | 17MB Total (16MB surface mount, 1MB socketed) |
| NVRAM / Time-of-Day | 32KB with replaceable battery backup |
| VMEbus Interface | Tundra Universe ASIC, ANSI/VITA 1-1994 VME64 |
| Ethernet Ports | Dual Intel 82559ER 10/100Base-TX |
| Serial Ports | Dual 16550 compatible async RS-232 |
| Expansion Slots | Dual IEEE P1386.1 32/64-bit PMC slots |
| Front Panel Type | Scanbe 5E front panel style (-2161 variant) |
| Operating Temperature | 0°C to 55°C (Commercial) |
4. Field Engineer’s Tech Notes
- P2 I/O Jumper Configuration: The MVME51105E-2161 supports jumper-selectable P2 backplane modes (PMC mode versus IPMC mode). Verify that your chassis backplane wiring and rear transition modules match the physical jumper layout before powering up the rack. Incorrect P2 mapping can short I/O lines or fail to route serial and Ethernet signals to the transition panel.
- NVRAM Battery Maintenance: The on-board lithium cell maintains the 32KB NVRAM and time-of-day clock. If the board has spent significant time in storage, check the battery voltage prior to installation. A depleted battery will wipe out user configuration parameters and boot environment variables upon a complete power cycle.
5. Adaptive QA & Testing Protocol
Our testing bench process for the MVME51105E-2161 goes beyond basic power-on checks. We mount the board into a live VMEbus test rack to validate the Tundra Universe controller through rigorous bus arbitration and data transfer cycles (A16/A32, D08/D64). We execute comprehensive memory diagnostic sweeps on the 512MB ECC SDRAM to detect address line or bit-flip faults. Both Intel 82559ER Ethernet ports undergo packet handshake and throughput verification, and serial communication ports are looped back for baud-rate integrity testing. Detailed test reports and functional videos are available upon request prior to shipment.
6. Buyer’s FAQ
- Q: What condition is this spare part supplied in?A: We stock this unit in both New Surplus (NSFP) and fully refurbished, tested working condition. Each board is clearly designated on your invoice so maintenance teams know the exact hardware state arriving on-site.
- Q: What is the standard warranty coverage for this legacy CPU board?A: We provide a comprehensive 12-month warranty covering all hardware components from the date of purchase, protecting your plant against premature failures.
- Q: How quickly can this part be shipped to minimize downtime during an outage?A: Emergency same-day shipping and expedited global courier options are available for this item from our domestic inventory hubs to get your line back online immediately.
- Q: Is this exact suffix (-2161) fully compatible with my existing system setup?A: Yes, the -2161 designation includes the 400 MHz MPC7410 processor, 512MB ECC SDRAM, and the Scanbe front panel. It serves as a direct drop-in hardware replacement for identical legacy part numbers without requiring application code changes.
