iDP3420/3421/3423 User’sMa nual
31 CITIZEN
10. SERIAL INTERFACE

10.1 Specifications

(1) Synchronoussy stem: Asynchronous
(2) Baudrate: 150, 300, 600, 1200, 2400, 4800, 9600, or 19200 bps (Userselectable)
(3) Configuration of one word
•Start bit : 1 bit
•Data bits : 7 or 8 bits (User selectable)
•Parity bit : Odd, even, or none (U ser selectable)
•Stop bit : 1 bit or more
(4) Signalpolarity
RS-232C
•Mark = Logic "1" (-3 Vto -12 V)
•Space = Logic"0"(+3Vto+12V)
(5) Receiveddata (RXD signal)
RS-232C
•Mark = 1
•Space = 0
(6) Receptioncontrol (DTR signal)
RS-232C
•Mark : Data transfer disabled
•Space : Datatransfer enabled