Compuprint 4051 - Manual (Page 54)

Printer Setups
48
Serial Interface Type
SLCT-IN SIGNAL
↑
SERIAL TYPE → or ← RS232C (*) ↑ or ↓
↓
RS422A ↑ or ↓
SERIAL MODE
This function selects the serial interface type: RS-232/C or RS-422/A.
Serial Connection Mode
SERIAL TYPE
↑
SERIAL MODE → or ← Local (*) ↑ or ↓
↓
Remote ↑ or ↓
BAUD RATE
This function selects the serial connection type: local or remote.