SATO SG112 ex Programming Reference Manual page 454

Code
ASCII (7 bits) Graphic (8 bits)
Connector
Product side: DSUB9 pin (female)
Cable side: DSUB9 pin (male)
Cable length: Equal to or less than 5 m
Transmission format
Start b1
When 7bit format is used, b8 is omitted.
Signal Level
High level: +5 to +12 V
Low level: -5 to -12 V
b2 b3 b4 b5 b6 b7 b8 Stop
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