Appendix B

Communication Interfaces

Data cables must be fully shielded and fitted with metal or metalized connector shells to prevent radiation and reception of electrical noise. To minimize electrical noise pickup in the cable:

nKeep data cables as short as possible.

nDo not bundle the data cables tightly with power cords.

nDo not tie the data cables to power line conduits.

Serial Data Communications

Table 11 illustrates the pin connections on the DB-25 connector at the rear of the printer.

PIN NO.

DESCRIPTION

1

Chassis Ground

2

TXD (Transmit Data) output from the printer

3

RXD (Receive Data) input to the printer

4

RTS (Request To Send) output from the printer

5

Not Used

6

DSR (Data Set Ready) input to the printer

7

RS-232 Signal Ground

8

Not Used

9

+5V @ 1A source

10

Not Used

11

RS-485 Signal Ground

12

Not Used

13

RS-485 Input B (-)

14

RS-485 Output B (-)

15

Not Used

16

RS-485 Input A (+)

17-18

Not Used

19

RS-485 Output A (+)

20

DTR (Data Terminal Ready) output from the printer

21-25

Not Used

Table 11. Rear Panel Serial Data Port Pinout

Z Series™ User’s Guide

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