Oki OKIPOS408II OKIPOS 408II Programmer s Technical Reference - Page 5
INTERFACE CONFIGURATION, 1.1. RS-232 Serial Interface, 1.1.1. Specifications (Conforming to RS-232)
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1. INTERFACE CONFIGURATION 1.1. RS-232 Serial Interface 1.1.1. Sp ecifications (Conforming to RS-232) Rating: RS-232C Synch method: Start-Stop synchronization method Handshake: DTR mode Baud rates: 4800, 9600, 19200, 38400 bps (Set by DIP switches) Bit length: 7, 8 bits (Set by DIP switches) Parity: Yes/No (Set by DIP switches) Parity bit: Odd/even (Set by DIP switches) Stop bit: 1 bit (Fixed) Signal polarity: Mark = logic 1 (-3 to -15 V) Space = logic 0 (+3 to +15 V) 1.1.2. Signal array and explanations according to interface connector pin Pin Signal Name No. Signal Direction 1 FG - 2 TXD OUT 3 RXD IN 4 RTS OUT 5 N.C - 6 DSR IN 7 SG - 8-19 N.C - 20 DTR OUT 21-24 N.C 25 /INIT IN Remarks Frame ground Transmission data Reception data Same as DTR Not used Not used Signal ground Not used Data terminal ready signal (SPACE: printer is ready to receive.) 1) When in DTR mode: When printer is ready to receive data: SPACE 2) When in XON/XOFF mode: Always SPACE except in the following conditions. 1. Until communication is possible after a reset. 2. When test printing Signal ground Signal ground STAR Line Mode Command Specifications 1-1