Owner`s manual

M SERIES DAC

CABLING

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V71 EIA-422 LINE INTERFACE

NOTE: When using EIA-422 line interface, you must access configuration

mode and reconfigure the line interface to EIA-422.

V71 RJ-45 CABLING FOR EIA-422

The V71 RJ-45 port uses the following signals for EIA-422 communication:

RJ-45 PIN/SIGNAL DEFINITION FOR EIA-422 LINE INTERFACE

Pin EIA-422

Signal

Direction Description

1 HSO Output Handshake Out, enable/disable the receiving of

characters

2 GND ---- Signal Ground

3 TX+ Output Transmit Data (+)

4 TX- Output Transmit Data (-)

5 RX- Input Receive Data (-)

6 RX+ Input Receive Data (+)

7 GND ---- Signal Ground

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

characters

You can use either RJ-45 (8-wire) or RJ-11 (4-wire) cabling when connecting the host

computer or terminal to the V71 using EIA-422 line interface. The required cable

should have TX+ connected to RX+ (and vice versa), TX- connected to RX- (and vice

versa), HSO connected to HSI (and vice versa), and have the signal grounds

connected.

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 HIS HSO

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