
The 7904 is a 3U compact PCI serial interface that provides four RS-232, RS-422, or RS-485 serial ports for demanding automation and control applications. Each port can be field configured to RS-232, RS-422, or RS-485 for maximum flexibility.
Our revolutionary Automatic RS-485 Enable circuit is included onboard to simplify multidrop network connections. 16C864 UARTs with deep 128-byte FIFOs are standard to reduce system overhead, even at high speeds.
Features
Four-port field selectable RS-232, RS-422, or RS-485 interface
Automatic RS-485 Enable and Disable
Hot Swap compliant (PICMG 2.1 Rev. 3.0)
PCI bus 2.2 compliant
Universal 3.3 and 5V compatible
Full RS-232 control signals supported