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2.
Pin Functions on Interfaces
2-1. Parallel Interface
Signal
Pin No.
Direction
Name
1
STROBE
IN
2
DATA1
IN
3
DATA2
IN
4
DATA3
IN
5
DATA4
IN
6
DATA5
IN
7
DATA6
IN
8
DATA7
IN
9
DATA8
IN
10
ACK
OUT
11
BUSY
OUT
12
PAPER OUT
OUT
13
SELECTED
OUT
14-15
N/C
16
SIGNAL GND
17
CHASSIS GND
18
+5VDC
OUT
19-30
GND
31
PRIM
IN
32
FAULT
OUT
33-36
N/C
2-2. Serial Interface
Signal
Pin No.
Direction
Name
1
GND
2
TXD
OUT
3
RXD
IN
RXD–
IN
4
RTS
OUT
5-6
N/C
7
GND
8
N/C
9
TXD+
OUT
10
TXD–
OUT
11-17
N/C
18
RXD+
IN
19
N/C
20
DTR
OUT
21-25
N/C
2-3. AppleTalk Interface
Signal
Pin No.
Direction
Name
1
HSKo
OUT
2
HSKi
IN
3
TXD–
OUT
4
GND
5
RXD–
IN
6
TXD+
OUT
7
N/C
8
RXD+
IN
Goes from High to Low (for at least 0.5 microseconds) when data are valid.
Eight-bit character data. DATA8 is the most significant bit; DATA1 is the least significant bit.
High is logic 1 and low is logic 0.
A low pulse acknowledges receipt of data.
Low when the printer is ready to receive data.
Goes High if the printer runs out of paper.
High when the printer is online.
Unused
Signal ground
Printer's chassis ground, isolated from signal ground.
External supply of +5VDC
Twisted pair return signal ground level.
LS-5 model does not check this signal.
LS-5EX and TT are not connected.
Goes Low to signal that the printer cannot print due to an error condition.
Unused. In case of LS-5 model, pin no. 33 and 35 are always HIGH.
Interface
232C/422A
Chassis ground
RS-232C
Transmitted data
RS-232C
Received data
RS-422A
Received data–
RS-232C
SPACE when the printer is ready to receive data.
But this printer does not check the signal.
Unused
232C/422A
Signal Ground
Unused
RS-422A
Transmitted data+
RS-422A
Transmitted data–
Unused
RS-422A
Received data+
Unused
RS-232C
SPACE when the printer is ready to receive data.
Unused
Handshake out (always GND)
Handshake in
Transmitted data –
Signal ground
Received data –
Transmitted data +
Unused
Received data +
– 5 –
GENERAL SPECIFICATIONS
Function
Function
Function
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