17
④
TTL Level
Mark=Logic “1” (4.0V
～
Vcc)
Space=Logic “0” (GND
～
0.45V)
RS-232C Level
Mark=Logic “1” (-5V
～
-9V)
Space=Logic “0” (
＋
5V
～＋
9V)
⑤
Serial Input/Output Signal Pins
Connector Printer Side : HDBB-25PF ( 05 ) ( Hirose )
Locking : HD-LNA ( 05 ) [ Using mm nut ] ( Hirose )
Serial Input/Output Pins
Pin No.
Signal Direction
Function
1
FGD -
Frame
Ground
2 TXD Output
Status
transmission*
1
3 RXD Input
Data
input
4
～
6
NC -
Not
used
7 SGD
-
Signal
ground
8 NC
-
Not
used
9 RST Input
Initialization
10
COP
Output
Cover open : Low*
2
11
ERR
Output
Error status : High*
2
12
～
17
NC -
Not
used
18
PE
Output
Paper end : High*
2
19 NC
-
Not
used
20
DTR
Output
Serial busy output
21
～
25
NC -
Not
used
*1 : Concerning contents of automatic status transmission, see the control code GS + “a” + n.
*2 : See “ Error Signals “.
