MPL SIO-3

500VDC Isolated Two Channel RS232

Using the concept of the SIMM (Single Inline Multipurpose Module), the SIO-3 features two RS232 serial channels. By the use of a DC/DC converter and optocouplers, an isolation barrier of at least 500VDC between digital section and RS232 section is achieved. This eliminates potential ground loop and RFI problems caused by compensation ground currents between two digital equipments. The module can be used on any microprocessor board providing the local MLX bus-extension. The MLX-bus (MPL local extension) provides an 8-bit synchronous bus and can be used like any microprocessor peripheral. The dimensions of the board are very small and the connector is an AMP-standard SIMM-connector.
As far as possible the technology used is CMOS. The board consumes typically 40mA (no load) from a single 5V supply.

Technical Features

SIMM Module
Very compact design (89 x 25mm)
MLX-bus (Mpl Local eXtension)
DUART 68C681 is used (3.6864MHz)
Two RS232 serial channels (first with RTS/CTS, second without)
Baudrate independently programmable from 50 to 9600 Baud
Maximum Baudrate limited to 9600 by design
68C681 includes a 16bit timer
500VDC isolation barrier between digital section and RS232 section
Eliminates potential problems and RF-Interference
Power requirements: +5V only, 40mA typ. (no load)
Temperature range: 0° to +70° C
Fully compatible with MPL408x MLX-connector

Further Documentation

Manuals, Data Sheets, and Press Releases can be found in the MPL Documentation area of this homepage.