7404EC - PCIe 4-Port RS-232;RS-422;RS-485 Async Serial Card

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7404EC - PCIe 4-Port RS-232;RS-422;RS-485 Async Serial Card

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Each port individually configurable for RS-232, RS-422, or RS-485
Supports asynchronous RS-232 data rates to 230.4 Kbps and RS-422/485 data rates exceeding 1 Mbps
Ultra high-speed UART with 256-byte Tx and Rx FIFOs
Bus-derived 125 MHz BRG and clock prescaler support wide range of baud rates
RS-485 line termination, pull-up and pull-down resistors for each port are selectable via dipswitches
All modem control signals implemented in RS-232 mode
Included 36" cable terminates to four DB9M connectors (Item# CA143)
PCI Express X1 compliant
RS-485 ECHO can be enabled/disabled via dipswitches
Compatible with any low profile PCI Express slot. A standard profile bracket is also included
Automatic RS-485 enable/disable in hardware

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Product Details

The 7404ec PCI Express serial interface provides four multifunction serial ports, each individually field-configurable for RS-232, RS-422, or RS-485. Each serial port features an ultra high-speed UART, flexible clock prescaler, and large 256-byte Tx/Rx FIFOs allowing the adapter to support the widest range of standard and non-standard baud rates to 230.4 Kbps (RS-232) and exceeding 1 Mbps (RS-422/485).

In RS-485 mode the board provides automatic control of the RS-485 driver in hardware, eliminating the need for application software control. This allows the 7404ec to be used with standard serial communications applications and removes the risk of bus contention and data corruption. Additionally, RS-485 network termination, critical to robust multi-drop communication, can be selectively added to the circuit via DIP-switches. In RS-232 mode, all modem control signals are implemented for maximum compatibility with a variety of serial peripherals.

Sealevel SeaCOM software driver and utilities make installation and operation easy using Microsoft Windows and Linux operating systems.

The 7404ec is a PCI Express X1 board compatible with any low profile PCI Express slot. A standard profile bracket is also included. The board ships with a 36-inch cable that terminates to four DB9M connectors (Item CA143).