Low Cost, Rugged 4-Port Opto-Isolated Serial PCIe MiniCard

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A rugged, low-cost 4-port multiprotocol opto-isolated serial port module is available in the popular PCIe MiniCard form factor measuring 30 x 51 mm. The DS-MPE-SER4OPT from Diamond Systems offers four RS-232/RS-485 opto-isolated serial ports in a PCIe MiniCard. Each port offers 16C550 compatibility and ultra-deep 256-byte TX/RX FIFOs. Maximum data rates are 1 Mbit/s in RS-232 mode and 10 Mbits/s in RS-485 mode. The board is available preconfigured for four RS-232 ports, four RS-485 ports, or a combination of two RS-232 and two 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 500V isolation from 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° 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. The DS-MPE-SER4OPT’s key features and functions also include a programmable slew rate that minimizes ringing on long or un-terminated cables, +/-500V ESD protection on all ports and support for Windows Embedded Standard 7, XP, Vista and Linux 2.6.xx.

Diamond Systems
Mountain View, CA.
(650) 810-2500