Citizen Systems CBM-270 - Manual (Page 38)

CBM-270 User’s Manual
7. SERIAL INTERFACE
7.1 Specifications
(1) Synchronous system : Asynchronous
(2) Baud rate : 1,200, 2,400, 4,800, 9,600, 19,200 bps (Selected by the user)
(3) 1-word configuration
Start bits : 1 bit
Data bits : 8 bits or 7 bits (Setting upon shipment)
Parity bits : Odd, even, or no parity (Selected by the user)
Stop bits : 1 bit or more
(4) Signal polarity
RS-232C
•
Mark = Logic "1" (-3
∼
-12 V)
•
Space = Logic "0" (+3
∼
+12 V)
(5) Received data (RXD signal)
•
Mark = 1
•
Space = 0
(6) Reception control (DTR signal)
•
Mark : Data not transferable
•
Space : Data transferable
(7) Transmission control (TXD signal)
•
DC1 code(11H) X-ON : Data receivable
•
DC3 code(13H) X-OFF : Data not receivable
7.2 Connector's Pin Configuration
No. Signal Name Input/Output Function
1 FG Frame Ground
7 GND Signal Ground
3 RXD Input Received Data
20 DTR Output Printer BUSY Signal
2 TXD Output Transmitted Data
6 DSR Input Data Set Ready
[Note] 1. The RS-232C signals are based on the EIA RS-232C.
2. The received data should be always maintained in the Mark status when no data is being
transferred.
Applicable connectors (D-Sub connectors)
Printer side : 17LE-13250 (Anphenol) or its equivalent
Cable side : 17JE-23250 (Anphenol) or its equivalent
7.3 Input and Output Signals