Oki OKIPOS 407II ParallelBlack Users Guide - Page 58

RS-232C Connector

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13-2. RS-232C Connector Pin No. 1 2 3 4 5 6 Signal name F-GND TXD RXD RTS N/C DSR Direction - OUT IN OUT IN 7 8~19 20 S-GND N/C DTR - OUT Function Frame ground Transmission data Receive data Same as DTR signal. Not used STAR Mode Status of this signal is not checked. ESC/POS Mode In DTR/DSR communication mode, indicates whether data receive from host is enabled or disabled. Space: Receive enabled Mark: Receive disabled (except when transmitting data by DLE EOT, and GS a) This signal is not checked in the X-ON/X-OFF communication mode. Signal ground Not used STAR Mode Indicates whether data receive from host is enabled or disabled. 1) DTR/DSR Communication Mode Space when receive is enabled. 2) X-On/X-Off Communication Mode Always space, except during following conditions: • Period between reset and communication ena- bled • During self printing ESC/POS Mode Indicates whether data receive from host is enabled or disabled. - 54 -

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– µ´ –
13-2. RS-232C Connector
Pin No.
Signal name
Direction
Function
±
F-GND
—
Frame ground
²
TXD
OUT
Transmission data
³
RXD
IN
Receive data
´
RTS
OUT
Same as DTR signal.
µ
N/C
Not used
6
DSR
IN
STAR Mode
Status of this signal is not checked.
ESC/POS Mode
In DTR/DSR communication mode, indicates whether
data receive from host is enabled or disabled.
Space: Receive enabled
Mark: Receive disabled
(except when transmitting data by DLE EOT, and GS a)
This signal is not checked in the X-ON/X-OFF com-
munication mode.
S-GND
—
Signal ground
·~±¸
N/C
Not used
²0
DTR
OUT
STAR Mode
Indicates whether data receive from host is enabled or
disabled.
1) DTR/DSR Communication Mode
Space when receive is enabled.
2) X-On/X-Off Communication Mode
Always space, except during following condi-
tions:
• Period between reset and communication ena-
bled
• During self printing
ESC/POS Mode
Indicates whether data receive from host is enabled or
disabled.