Digi EIA-422 - Manual

90033900D

EIA-422 Mode (EtherLite 2 or 162 only)

To operate a port of the EtherLite 162 EIA-422 in EIA-422 mode, set the
port’s EIA-422 ENABLED switch to the up position. Set the TERMINA-
TION (422 ONLY) switch to the down position. This switch connects a
120 ohm, 1/2 watt resistor across the input signals.

EtherLite 2 EIA-422 ports are hard-wired to EIA-422 mode, and have no
termination installed. Pinouts are shown in the table below.

Note:

2-wire multidrop configuration for EIA-422 is

not

supported.

EIA-422 Pinouts

*EIA-232 signals on EtherLite EIA-422 only

EIA-485 Mode (EtherLite 2 EIA-485 only)

EtherLite 2 EIA-485 ports are wired for half duplex multiple drop EIA-
485 mode and have no termination installed.

EIA-485 Pinouts

Environmental Specifications

Operating Temperature

32°F (0°C) to 122°F (50°C)

for units with less than 32 ports

32°F (0°C) to 95°F (35°C)

for 32-port units

Storage Temperature

-13°F (-25°C) to 167°F (75°C)

Operating or Storage Humidity

0 to 90% non-condensing

AC Power Requirements (maximum)

100-240 VAC, 50-60 Hz
15W (15VA)

for units with less than 32 ports

25W (25VA

) for 32-port units

Power Cord

The recommended power cord for North American units is:
UL Listed, CN, detachable type SJT or SVT, 3 conductor, 18 AWG, rated
125 V, 10 A.

CAUTION:

To prevent electric shock, do not remove the cover of an

EtherLite module. There are no user-serviceable parts inside. Refer ser-
vicing to qualified personnel.

Copyright

The Digi logo and EtherLite are registered trademarks of Digi International. All other brand and product
names are trademarks of their respective holders.

© Digi International Inc., 2000

All Rights Reserved

Information in this document is subject to change without notice and does not represent a commitment on
the part of Digi International.
Digi provides this document “as is”, without warranty of any kind, either expressed or implied, includ-
ing, but not limited to, the implied warranties of fitness or merchantability for a particular purpose. Digi
may make improvements and/or changes in this manual or in the product(s) and/or the program(s)
described in this manual at any time.
This product could include technical inaccuracies or typographical errors. Changes are periodically made
to the information herein; these changes may be incorporated in new editions of the publication.

EtherLite

Hardware

Information Guide

Overview

Digi EtherLite serial port servers connect asynchronous serial ports to
10BASE-T and 100BASE-T Ethernet connections. Most EtherLite serv-
ers support speeds up to 115 Kbps or 230 Kpbs on all ports simulta-
neously.

Ethernet Cabling Requirements

The EtherLite unit requires an unshielded twisted-pair (UTP) 10Base-T
Ethernet or 100Base-TX connection. In order to maintain radio frequency
emissions compliance, use EIA/TIA 568-compliant Category 4 or Cate-
gory 5 for 10Base-T and Category 5 only for 100Base-TX.

Installing the EtherLite Software

Install the hardware before you install the device driver software. Follow
the software installation instructions on the Access Resource CD.

Signal

RJ-45

Pin

Direction

RTS*

1

RxD(-)

2

input(-)

DCD*

3

RxD(+)

4

input(+)

TxD(+)

5

output(+)

SG

6

TxD(-)

7

output(-)

CTS*

8

Signal

RJ-45

Pin

Direction

No connect*

1

No connect*

2

No connect*

3

TX(A)/RX(A)

4

Bidirectional

TX(B)/RX(B)

5

Bidirectional

GND

6

No connect*

7

No connect*

8

*Do not connect any signal.