Parallel - serial converter
BEI Industrial Encoder Division

BEI'S serial-to-parallel converter module takes serial data from any BEI Serial Synchronous Interface (S3) or RS-422 Interface (S1) encoders and converts it to a parallel output. This eliminates the high cost and noise susceptibility of long, parallel cable runs, enabling the simplicity of a serial output encoder and a low cost twisted pair cable to interface with a standard PLC or controller. The bright LED indicators give visual status for deserialization, testing and troubleshooting.

Serial input, either SSI or RS-422 is easily selectable by a Format Select terminal directly on the board. In SSI mode, the on-board clock generates pulses to signal the encoder to provide data. Data is received serially and converted to a parallel format. Clock frequency is selectable by a Speed Select terminal, again directly on the board. For 100 feet or less, the 1.25 MHz mode can be used and for longer distances, up to 500 feet, a 200 kHz rate is available.

In RS-422 mode, data is received asynchronously from the encoder and converted to a parallel format. Speed Select input is used to set the baud rate: 19.2 kBaud for most applications, up to 500 feet; 115.2 kBaud for shorter runs below 100 feet.