The ISO COMM2.cPCI is a CompactPCI 3U isolated two port serial I/O adapter. It provides two field selectable RS­232/422/485 serial ports supporting data rates up to 921.6K bps (RS-422). Isolation is important in installations where the equipment connected to the PC is either located far from the host system, or on a different power transformer circuit. True port to port optical isolation on the ISO COMM2.cPCI eliminates the effects of Ground Loop Current, a commonly neglected and misunderstood phenomenon that leads to data errors and the destruction of communications equipment. Sealevel's implementation goes a step beyond typical isolated products by isolating not only the signals, but also isolating the ports from each other. Configure both ports as RS­232 when highly reliable standard serial ports are required. Choose the RS-422 mode for long distance device connections up to 4000ft. where noise immunity and high data integrity are essential. Select RS-485 and capture data from multiple peripherals in a RS­485 multidrop network. Up to 31 RS-485 devices can be connected to each port to automate your data collection. You can even mix the ports in any of the interface combinations to provide maximum flexibility to your application. Sealevel even has optional DB9 terminal block adapters to simplify field wiring and custom pin-out configurations.
In RS-485 mode, our onboard auto-enable hardware automatically handles the RS-485 driver enable allowing the RS­485 ports to be treated as a standard serial port by the operating system. This allows the standard COM: driver to be utilized for RS­485 communications.
We include our Advanced COM drivers for 95/98/ME/NT/2000 and XP providing IRQ sharing, Windows serial diagnostics, and other enhanced features. Our Linux and QNX utilities are also included to simplify installation.

2 PORT cPCI RS-232/422/485 Iso Back to 2 Port

View The 7903 User Manual (PDF) Download The Serial Utility Disk

• Hot Swap compliant (PICMG 2.1 Rev. 3.0)
• PCI bus 2.1 compliant
• Automatic RS-485 Enable and Disable
• Supports data rates up to 921.6K bps
• 16850 buffered UART standard
• Universal 3.3 and 5V compatible
• Full RS-232 control signals supported
• RS-422/485 control signals include TD, RD, RTS, CTS
• Termination options: switches in/out for RD resistor
• Failsafe biasing via pullup/pulldown
• Each port designed to maximize DOS, Linux, QNX, and Windows 3.1x/95/98/ME/NT/2000 communications