The Emerson/Motorola PMCSPAN1-002 is a single-slot 6U VMEbus carrier board that bridges PCI Mezzanine Card (PMC) modules to VME-based processing systems. It expands VME system I/O and processing capacity by hosting up to two single-wide or one double-wide PMC module per board. The carrier incorporates a PLX6150 (or DEC 21150 variant) PCI-to-PCI bridge with dual 32-bit interfaces operating at 33 MHz, 5V signaling. Multiple PMCspan boards stack onto a host processor to reach four single-wide PMC slots total. Front panel and P2 I/O access accommodate customer-supplied PMC payloads. Manufactured with 94V-0 flame-rated PWBs and VME Scanbe front panel handles.
## Technical Specifications
**Form Factor & Dimensions**
• Single-slot 6U VMEbus carrier
• Height: 233.4 mm (9.2 in.)
• Depth: 160.0 mm (6.3 in.)
**PCI Interface**
• PCI local bus specification revision 2.1 compliant
• PCI-to-PCI bridge: PLX6150 or DEC 21150
• Primary and secondary bus: 32-bit each
• Bus clock: 33 MHz
• Signaling: 5V
**PMC Module Support**
• Capacity: two single-wide or one double-wide PMC
• Connector: IEEE P1386.1 PCI Mezzanine Card slots
• Power per PMC: 7.5 watts max.
**Power Consumption**
• +5V @ 0.44 A (max.)
• +12V @ 0 A (max.)
• –12V @ 0 A (max.)
**Construction**
• PWB flammability: 94V-0 (UL recognized)
• Front panel: Original VME Scanbe design with handles
## Key Features
• Stacking capability: multiple boards stack on processor modules without requiring secondary PCI-to-PCI bridges on upper boards
• Dual I/O access: both front panel and P2 connectivity for PMC integration
• Host interface via PCI expansion connector
## Compatibility & Integration
The PMCSPAN1-002 mates with Emerson PowerPlus VME series hosts, specifically MVME2300/2400 processor modules. Accepts industry-standard IEEE P1386.1 compliant PMC modules.
