Ethernet communication interface card DNx-SL-501 series

RS-232RS-485RS-422

The DNx-SL-501 are 4-port serial communications layers for UEI’s powerful Cube, RACKtangle and FLATRACK I/O chassis. The boards offer fully isolated serial interfaces, software-configurable as RS-232 or RS-485. DNx-SL-501 supports up to 2 Mbit/s transfer speed in RS-485 mode or up to 256 Kb/s in RS-232 mode. A special version of the board, designated as the DNx-SL-501-804, supports baud rates up to 4 Mbit/s. The boards use a 16550C UART emulation on each port (FIFO mode only) and support half- and full-duplex mode over RS-485. The DNx-SL-501 is compatible with RS-422 networks when used in RS-485 mode. The layer provides 200Ω software-selectable TX and/or RX termination for RS-485 communications. The DNx-SL-501 is an ideal solution for connecting serial based data acquisition devices to the Ethernet, as well as interfacing to a wide variety of serial based devices and legacy DAQ systems. In addition to standard serial I/O features, the DNx-SL-501 offers a series of additional functions. These functions include: Fully customizable baud rates generated by programmable PLL on per-channel basis from 300baud to 2Mbaud Programmable inter-character delay (required to drive/simulate some avionics instruments)\Programmable inter-frame delay (used to schedule frames at different rate) Automatic repeat of the last frame if new data is not sent from the host on time (required to keep “inop” flag happy on many avionic devices) None/Even/Odd/Space/Mark parity in 8-bit mode and per-symbol programmable in 9-bit mode