Owner`s manual

V71 (EIA-422, 8-wire) Equipment

RJ-45 Connections

1 HSO HSI

2 GND GND

3 TX+ RX+

4 TX- RX-

5 RX- TX-

6 RX+ TX+

7 GND GND

8 HSI HSO

Figure 20: V71 RJ-45 (8-wire) Connection for EIA-422 Line Interface

NOTE: If you wish to use RJ-11 (4-wire) cabling,

connect pins 3 through 6 on the RJ-45 connector as

shown in Figure 20. In addition, you should enable

XON/XOFF handshaking as described Section 11.4.

9.2.2 V71 DB-25 CABLING FOR EIA-422

IMPORTANT: If you intend to use EIA-422 line interface

utilizing the DB-25 connector on the V71, you must

change the jumper setting on the V71 board as

described in Appendix C and reconfigure the line

interface to EIA-422 as described in Section 11.4.

The V71 DB-25 port uses the following signals when

configured for EIA-422 communication:

DB-25 PIN/SIGNAL DEFINITION FOR EIA-422 LINE INTERFACE

Pin# EIA-

422

Signal

Direction Description

1 PGND ---- Protective Ground

2 TX- Output Transmit Data (-)

3 RX- Input Receive Data (-)

5 HSI Input Handshake In, enable/disable the transmission of

characters

7 SGND ---- Signal Ground

14 TX+ Output Transmit Data (+)