The mPCIe-ICM485-4 by ACCESI/O is a PCI Express mini card with 4 x RS-485 isolated serial ports. Each port is capable of communication speeds as high as 3Mbps and has 128-byte deep transmit and receive FIFOs. Large FIFOs protect against data loss in multitasking operating systems, reduce CPU utilization, and improve data throughput, while reducing or eliminating inter-character or inter-packet pauses. The advanced integrated circuit with pre-scalar supports a wide variety of custom baud rates, and any rates not otherwise achievable can be supported via a custom factory-installed crystal oscillator (up to 12Mbps!).
Tru-Iso™ port-to-port and port-to-PC isolation provides a robust solution to common signal level and grounding issues when using long cables to connect computers and other powered devices - up to 500V of difference between pins and adjacent ports and 1500V between each port and the host computer.
Communication is possible either with custom application software, with off-the-shelf applications (such as HyperTerminal), or with provided samples and utilities, including WinRISC™ (“Windows Really Incredibly Simple Communication).
- Connector
- I/O: Hirose DF57-5P-1.2V 5-pin, latching
- Mating: Hirose DF57H-5S-1.2C
- Serial Ports: 4 x RS-485
- UART: Quad 16C950 with 128-byte FIFO for each transmit & receive buffer
- Baud Rates: Up to 3M baud (advanced-prescaler allows a wide variety of unusual baud rates to be achieved. Up to 12Mbps via custom crystal option.)
- Character length: 5, 6, 7, 8 bits (contact factory for assistance with 9-bit data)
- Parity: Even, Odd, None, Mark, Space
- Stop Interval: 1, 1½, 2 bits
- Flow Control: Xon/Xoff, None
- Operating Temperature: -40°C to 85°C
- Storage Temperature: -65°C to 150°C
- Humidity: 5% to 95%, non-condensing
- Power required: +3.3VDC @ 1.6W (typical)
- ESD Protection: ±15kV on all signal pins (IEC 61000)
