The General Standards PMC66-SIO4BXR-256K is a four-channel serial I/O PMC card delivering high-performance synchronous and asynchronous serial communication for demanding embedded systems. Built on a 66 MHz PCI interface engine with independent Dual Universal Serial Controllers per channel, the card supports seven industry-standard protocols—asynchronous, monosync, bisync, SDLC, HDLC, nine-bit, and IEEE 802.3—across synchronous rates to 10 Mbps and asynchronous rates to 1 Mbps. Each channel includes dedicated 32 kB transmit and receive FIFOs, totaling 256 kB across the card. Multi-protocol transceivers support RS422/RS485 at 10 Mbps, RS423/RS232 at 230 kbps, and V.35 and RS530 interfaces. The card mounts on PMC carrier boards compatible with PCI, PCIe, PXI, and cPCI form factors, enabling flexible deployment across multiple platforms.
## Technical Specifications
• **Serial Channels:** 4 independent, configurable as DTE or DCE
• **Protocols:** Asynchronous, monosync, bisync, SDLC, HDLC, nine-bit, IEEE 802.3
• **Synchronous Data Rate:** Up to 10 Mbps
• **Asynchronous Data Rate:** Up to 1 Mbps
• **FIFO Memory:** 32 kB transmit and 32 kB receive per channel (256 kB total)
• **Transceiver Standards:** RS422/RS485, RS423/RS232, V.35, RS530
• **PCI Interface:** 32-bit, 66 MHz, PCI Specification 2.2 compliant
• **Power Supply:** +5 VDC ±0.2 V at 1.5 A max; +12 VDC ±0.2 V at 0.03 A max
• **Power Dissipation:** Approximately 5.25 W typical
• **Connector:** 68-pin SCSI-type front edge
• **Form Factor:** 149 mm × 74 mm PMC mezzanine card
## Key Features
• High-speed DMA transfers for efficient data movement
• Independent transmit and receive FIFO buffers per channel
• Unused serial signals configurable as general-purpose I/O
• 3.3 V IO / 5 V tolerant PCI bus interface
• PMC rear I/O connection supported
## Compatibility & Integration
• Mounts on PMC carriers for PCI, PCIe, PXI, and cPCI systems
• Commercial operating temperature: 0°C to +70°C
• Industrial operating temperature: -40°C to +85°C
• Operating humidity: 0% to 80%, non-condensing
• Altitude rating: Up to 10,000 ft
