Dataproducts Long Line Interface. Compaq 5525B, 5525B/31/32, PrintNet 5532, 5531, PrintNet 5525B, PrintNet 5531, 5532

Chapter 5 Dataproducts Long Line Interface

Dataproducts Long Line Interface

Table 3. Dataproducts Long Line Interface Connector Pin Assignments

(with a 50-pin AMP HDH-20 Data Cable Connector)

Input Signals Output Signals Miscellaneous

Signal Pin Signal

DATA LINE 1

Return

DATA LINE 2

Return

DATA LINE 3

Return

DATA LINE 4

Return

DATA LINE 5

Return

DATA LINE 6

Return

DATA LINE 7

Return

DATA LINE 8

Return

DATA STROBE

Return

PAPER INSTRUCTION

Return

38

37

30

14

BUFFER CLEAR

Return

31

15

NOTE: Pins not listed are not connected.

41

40

34

18

43

42

36

35

28

44

1

2

19

3

20

4

READY

Return

ONLINE

Return

DEMAND/DATA REQ.

Return

PARITY ERROR

Return

Pin

23

7

27

11

22

6

21

5

Signal

CABLE VERIFY

GROUND

TEST

Pin

45, 46

39

12

The length of the data cable from the host computer to the printer must not exceed 492 feet (150 meters).

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Dataproducts Long Line Interface Signals

Dataproducts Long Line Interface Signals

Dataproducts-compatible interface signals between the host computer and the printer are defined as follows:

Data Lines 1 through 8. Provides eight standard or inverted levels from the host that specify character data, plot data, or a control code.

Data Line 8 allows access to the extended ASCII character set. You can enable or disable this line via the Data Bit 8 parameter on the

Dataproducts submenu (see page 114

).

Data Strobe. Carries a high true pulse from the host when data is ready. The data strobe remains high until the Data Request line goes false. The active edge of the strobe signal can be configured as leading, middle (default), or trailing.

Paper Instruction (PI). Carries a DVFU signal from the host with the same timing and polarity as the data lines.

Ready. Carries a high true signal from the printer when AC power and

DC voltages are present, paper is loaded properly, and the printer is not in a check condition.

Online. Carries a high true signal from the printer when the Ready Line is true and the ON LINE key on the control panel has been pressed.

When the printer is in online mode, it may accept data from the host.

Demand/Data Request. Carries a high true signal from the printer when the printer is ready to accept character data from the host. This signal changes to false shortly after the leading edge of the data strobe signal.

Cable Verify. Two pins on the interface connector are jumpered together to allow the user to verify proper installation of the interface connector.

Buffer Clear. A high true level from the host to indicate the printer should perform a reboot.

Test. This signal is connected to +5 volts through a 470 ohm resistor.

Parity Error. Always carries a low false signal from the printer indicating there is no parity error.

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