DE140501 – PXIe RS-232 / RS-422 / RS-485 Serial Communication Module 8 CH is a PCI eXtension for Instrumentation (PXIe) compatible module offering 8 channels of high-performance RS-232 / RS-422 / RS-485 programmable asynchronous serial interface.

The serial channels can be individually programmed to operate as RS-232, RS-422 or RS-485 full duplex / half duplex interface. In addition, programmable termination is provided for the RS-422 / RS-485 interfaces. After power-up all serial I/O lines are in a high impedance state.

• Each RS-232 channel supports RxD, TxD, RTS, CTS, and GND.
• A four-wire interface (RX+, RX-, TX+, TX-) and ground (GND) are supported in RS-422 and RS-485 full-duplex modes.
• RS-485 half-duplex supports a two-wire interface (DX+, DX-) plus ground (GND).

Each channel has 256-byte transmit and receive FIFOs to significantly reduce the overhead required to provide data to and get data from the transmitters and receivers. The FIFO trigger levels are programmable and the baud rate is individually programmable up to 1 Mb/s for RS-232 channels and 20 Mb/s for RS-422 / RS-485 channels with selectable 250 Kb/s slew limiting. The UART offers readable FIFO levels.

The design is ideal for point-to-multi-point (broadcast) systems, enabling a single master device to reliably stream continuous data or commands to multiple listening slave devices (RS422 mode).

All serial channels use ESD and surge protected transceivers. ESD protection is up to ±30 kV.

Key Features

• New high-performance serial communication
  • RS-232 mode up to 1 Mb/s
  • RS-422 / RS-485 modes up to 20 Mb/s
  • PCIe interface UART with 256-byte FIFOs
  • Independent serial 8 ports
  • RS-422 / RS-485 termination programmable
• Individually configurable RS-232/RS-422/RS-485 ports, selectable via software or hardware
• Dedicated RS-422 full-duplex operation
• ±30 kV ESD and Level 4 surge protection on all serial ports

DE140500 is compatible with IEC 60068-2-1 / IEC 60068-2-2 / IEC 60068-2-78 / IEC 60068-2-27 / IEC 60068-2-64 / EN 61326 (IEC 61326) / EN 55011 (CISPR 11) / AS/NZS CISPR 11 / FCC 47 CFR Part 15B / ICES-001 standards.

Areas of application include:

• Next generation point-of-sale systems
• Factory automation and process control
• Multi-port RS-232 / RS-422 / RS-485 cards
• High performance serial communication