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4-Port Isolated RS-485 PCI Express Mini Card with Wide Operating Temperature

ACCES I/O Official Distributor
ACCES I/O Official Distributor
Model No:
50.95mm (L) x 30mm (W)

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).

Main Features
  • 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)
Ordering Info
  • mPCIe-ICM485-4 4-port isolated RS-485 PCI Express Mini Card with industrial operating temperature
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