Description

The 104-COM-8SM Series are eight, four, or two-port, asynchronous, serial communication boards that support field selectable RS-232/422/485 communication. Ports are accessed via two 40-pin IDC type right angle header connectors. The boards include a convenient Auto-RTS feature, which makes half-duplex RS-485 communications effortless.

The 104-COM-8SM Series are feature-rich and allow for the connection of multiple serial devices—ideal for a variety of applications such as POS, gaming systems, machine monitoring and control, military, high-density networking applications or any other application requiring the connection of RS-232/422/485 serial devices to a PC/104 compatible system.

The 104-COM-8SM Series were designed using type 16780 UARTS and include 64-byte transmit/receive FIFO buffers to protect against lost data in multi-tasking systems while maintaining 100% compatibility with all operating system COM port drivers. A crystal oscillator located on the board permits baud rate capability up to 921.6K. The boards are offered in both standard and extended temperature versions - ideal for outdoor applications or harsh industrial surroundings.

• 8, 4 or 2 independent asynchronous serial COM ports
• Field selectable RS-232, RS-422 and RS-485, independent for each port
• Auto-RTS feature makes half-duplex RS-485 communications effortless
• Speeds up to 921.6K with 64-byte FIFO
• Fixed bias and jumper selectable termination provided on each transmit and receive channel simplifies cabling
• Programmable individual non-volatile base addresses and IRQs simplifies installation
• Low power required: +5VDC at 80mA typical
• Operates as a standard COM port in all operating systems