Citizen Systems iDP-3550 - Manual (Page 42)

10. SERIAL INTERFACE
10.1 Specifications
(1) Synchronous system: Asynchronous
(2) Baud rate: 150, 300, 600, 1200, 2400, 4800, 9600, or 19200 bps (User selectable)
(3) Configuration of one word
•Start bit : 1 bit
•Data bits : 7 or 8 bits (User selectable)
•Parity bit : Odd, even, or none (User selectable)
•Stop bit : 1 bit or more
(4) Signal polarity
RS-232C
•Mark
= Logic "1" (-3 V to -12 V)
•Space = Logic "0" (+3 V to +12 V)
(5) Received data (RXD signal)
RS-232C
• Mark
= 1
• Space = 0
(6) Reception control (DTR signal)
RS-232C
•Mark
: Data transfer disabled
•Space : Data transfer enabled