Computer/Embedded Technology


4-port serial PCIe MiniCard

9 October 2013 Computer/Embedded Technology

New from Diamond Systems is the DS-MPE-SER4OPT, a rugged, low cost serial port module in the PCIe MiniCard form factor measuring 30 x 51 mm. The board offers four RS-232/RS-485 opto-isolated serial ports in this popular form factor.

Each port offers 16C550 compatibility and 256-Byte TX/RX FIFOs. Maximum data rates are 1 Mbps in RS-232 mode and 10 Mbps in RS-485 mode. The board is available preconfigured for four RS-232 ports, four RS-485 ports or a combination of four RS-232 and four RS-485 ports. I/O signals are provided on two miniature latching connectors, with two ports per connector.

Each pair of serial ports on the DS-MPE-SER4OPT offers up to 500 V isolation from the system ground. Opto-isolation increases reliability in applications with long cable runs, where a difference in ground potential can cause significant ground loop currents, damaging non-isolated boards and equipment.

Isolation on this miniature board is achieved through a combination of highly integrated isolated power + data components, careful component placement and layout, and a safety-enhancing insulation film on the bottom side, which prevents accidental contact with components on the carrier board.

Extended temperature capability of -40°C to +85°C enables the board to operate in environments with extreme temperature swings, such as vehicles or outdoor installations. In addition, the board may be custom-configured with 0-ohm resistors in place of jumper blocks for increased ruggedness in high-vibration environments.



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