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Parallel interface, Connector assignment – Dascom LA550W User Guide User Manual

Page 131

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User guide

Interfaces

123

Parallel interface

The bidirectional parallel interface offers the so called “nibble” mode
of the IEEE1284 interface norm. This enables installation in accor-
dance with Windows “Plug & Play”.

The standard parallel interface is able to transfer data at a speed of
max. 30,000 bytes per second. When the receiving buffer is full, the
data input is blocked until the data buffer is empty. This guarantees
data transmission in blocks of 1 KB.

Connector assignment

Transmission length: max. 2,0 m

Connector no.

Direction

Printer–PC

Signal

1

STROBE (active low)

2

DATA 1

3

DATA 2

4

DATA 3

5

DATA 4

6

DATA 5

7

DATA 6

8

DATA 7

9

DATA 8

10

ACK (active low)

11

BUSY

12

PAPER EMPTY (PE)

13

SELECT

14

AUTO FEED (active low)

15 not

used

16

SIGNAL GROUND

17

CHASSIS GROUND

18

5 V (Imax = 500 mA)

19–30

SIGNAL GROUND

31

INIT (active low)

32

ERROR (active low)

33

SIGNAL GROUND

34–35

not used

36

SELECT IN

18

1

19

36

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