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7.
SERIAL INTERFACE
7.1
Specifications
(1) Synchronous system
(2) Baud rate
(3) 1-word configuration
Start bits
Data bits
Parity bits
Stop bits
(4) Signal polarity
RS-232C
• Mark
• Space
(5) Received data (RXD signal)
• Mark
• Space
(6) Reception control (DTR signal)
• Mark
• Space
(7) Transmission control (TXD signal)
• DC1 code(11H) X-ON
• DC3 code(13H) X-OFF
7.2
Connector's Pin Configuration
No.
Signal Name
1
7
3
20
2
6
[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)
: Asynchronous
: 1,200, 2,400, 4,800, 9,600, 19,200 bps (Selected by the user)
: 1 bit
: 8 bits or 7 bits (Setting upon shipment)
: Odd, even, or no parity (Selected by the user)
: 1 bit or more
∼
= Logic "1" (-3
∼
= Logic "0" (+3
= 1
= 0
:
Data not transferable
:
Data transferable
:
:
Input/Output
FG
GND
RXD
DTR
TXD
DSR
Printer side
: 17LE-13250 (Anphenol) or its equivalent
Cable side
: 17JE-23250 (Anphenol) or its equivalent
-12 V)
+12 V)
Data receivable
Data not receivable
Input
Output
Output
Input
23
CBM-270 User's Manual
Function
Frame Ground
Signal Ground
Received Data
Printer BUSY Signal
Transmitted Data
Data Set Ready
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