The Emerson/Motorola PMCSPAN-002 is a single-slot 6U VMEbus carrier board that integrates PCI Mezzanine Cards (PMCs) into VME-based systems. It accommodates one double-wide or two single-wide PMC modules per board and supports stacking to expand computational and I/O capabilities across multiple cards. The board bridges host CPU modules to customer-supplied PMCs via a PLX6150 PCI-to-PCI interface bridge, providing access to front-panel and P2 I/O connectors.
## Technical Specifications
**Interface Architecture**
• PCI-to-PCI bridge: PLX6150 (DEC 21150 equivalent)
• Primary bus: 32-bit interface
• Secondary bus: 32-bit interface
• Host connection: Dedicated PCI expansion connector
**PMC Support**
• Single carrier capacity: Two single-wide or one double-wide PMC
• Stacking capability: Up to two PMCSPAN boards per host VME processor
• Maximum supported PMCs: Four additional single-wide cards (stacked configuration)
**Power (no PMCs installed)**
• +5V @ 0.44 A maximum
• +12V @ 0 A maximum
• –12V @ 0 A maximum
**Physical Dimensions**
• Height: 233.4 mm (9.2 in.)
• Depth: 160.0 mm (6.3 in.)
• Front panel height: 261.8 mm (10.3 in.)
• Width: 19.8 mm (0.8 in.)
• Handles: IEEE 1101 compliant injection/ejection per VME64 extensions
**Construction**
• All PWBs: UL-recognized 94V-0 flammability rating
## Key Features
• Cascadable architecture for multi-card PMC expansion
• Native VME64 mechanical compliance with standard handles
• Dual-width PMC flexibility (single double-wide or two single-wide cards)
• Software transparency for stacked modules
• Supports both front-panel and rear connector (P2) I/O routing
## Compatibility & Integration
Verified compatibility with Emerson PowerPlus and Motorola PowerPlus VME processor families, including MVME2300, MVME2400, MVME5100, and MVME51005E series single-board computers.
