
RS-232C Serial Interface
Signal descriptions
SG...Signal Ground
Connected to the signal ground of the adaptor’s circuit board.
RXD...Receive Data
Inputs serial data form the computer. SPACE (+ side) indicates “0” data;
MARK (- side) indicates “1” data.
TXD...Transmit Data
Outputs serial data to the computer. SPACE indicates “0” data; MARK
indicates “1” data.
Data Input: Parity bit: no parity
Stop bit: 1 bit
Data length: 8 bits
Character:
Graphics:
ASCII
8 bit
Data Input Codes:
Transmission Speed (Baud Rate): 2400, 4800, or 9600
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