Digi EL 2, EL 8, EL 16, EL 32, EL 160 Installation Manual

90033900C

EIA-422 Mode (EtherLite 2 or 162 only)

To operate a por t of t h e EtherLi te 1 62 E IA -42 2 i n EI A-42 2 mo de, s e t t he
port’s EIA-422 ENABLED switch to the up position. Set the TERMINA­TION (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-wi red t o EIA-42 2 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 EIA­485 mode and have no termination installed.

EIA-485 Pinouts

*Do not connect any signal.

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., 2001
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, includ­ing, 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

Installation Guide

Overview

Digi EtherLite serial port servers connect asynchronous serial ports to
10Base-T or 100Base-T Ethernet connections. Most EtherLite servers
support speeds up to 115 Kbps or 230 Kbps on all ports simultaneously.
This table shows all EtherLite models and their capabilities.

EtherLite Models

* Individual ports are configurable as either EIA-232 or EIA-422.
** 115 Kbps is not attainable on all ports simultaneously on the EL-32.

Ethernet Cabling Requirements

The EtherLite unit requires an unshielded twisted-pair (UTP) 10Base-T
or 100Base-TX Ethernet connection. In order to maint ain radio frequen cy
emissions compliance, use EIA/TIA 568-compliant Category 4 or Cate­gory 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

Model

Serial
Ports

Port

Protocol

Ethernet

Connection

Maximum

Baud Rate

EL 2 2 EIA-232 10Base-T 230 Kbps
EL 2 2 EIA-422 10Base-T 230 Kbps
EL 2 2 EIA-485 10 Base T 230 Kbps

EL 8 8 EIA-232 10Base-T 115 Kbps
EL 16 16 EIA-232 10Base-T 115 Kbps
EL 32 32 EIA-232 10Base-T 115 Kbps**

EL 160 16 EIA-232 10/100Base-T 230 Kbps
EL 162 16

EIA-232 or

EIA-422*

10/100Base-T 115 Kbps

Installing the EtherLite Hardware

1. Write the Ethernet address of the unit on the following line. It will be
needed during software installation. This address is printed on a
label attached to the unit.

Ethernet Address #_____________________________________

2. Connect the Ethernet cable to the unit using the RJ-45 jack labeled
10Base-T or 10/100Base-T located on the front of the cabinet. Use
the provided straight-through cable to connect the unit to a hub . Con­necting directly to an Ethernet card will require a 10Base-T cross­over cable (not provided). Note that either wiring scheme requires
that the twisted pairs be used for specific pairs of pins: 1&2, 3&6,
4&5, and 7&8.

Ethernet RJ-45 Pinouts

3. Assign an IP address to the EtherLite module using the utilities rec­ommended in the software installation guide.

Note: You will need to refer to the software installation guide that
accompanies this product on how to assign an IP address.

Rack Mount Installation

For the EtherLite 32, a rack mount kit is included. The rack mount brack­ets may be installed at either the front or rear of the unit.

To install each bracket, do the following:

1. Remove the two screws on the side of the cabinet.
WARNING: To prevent electric shock, do not remove the module

cover. There are no user-serviceable parts inside. Refer servicing to
qualified personnel only.

2. Align the countersunk holes of the bracket with the vacated holes in
the cabinet. Use the countersink screws to fasten the bracket to the
cabinet.

Rack Mount Considerations

When doing a rack mount installation consider the following:

• Cumulative power requirements of the unit and other equipment
installed in the rack. Do not overload rack supply circuits.

• Safety and stability. Always stack the rack from bottom up to ensure
a stable and safe rack.

Note: The EtherLite 32 weighs 5.8 lbs (2.6 kgs).

• Air flow in the rack. Make sure the unit’s ambient temperature does
not exceed 95°F (35°C).

• Grounding. Earth ground the unit reliably to the rack system. The
earth ground connection must be maintained when the supply con­nection is other than a direct connection to the branch circuit.

EIA-232 Connectors

Many EIA-232 serial devices implement their serial ports with DB-25
connectors. The EtherLite units have serial p orts i mplemented with 8-p in
RJ-45 modular jacks, with each signal using EIA-232 voltage levels. The
figures below shows the pinouts of all these connector types.

EIA-232 DTE Pinouts

CAUTION: RJ-45 cables designed for other Digi products must not
be used with Digi EtherLite and SCSI Terminal Server products. The
EtherLite RJ-45 pin configuration differs from the configuration of
the RJ-45 connectors used on other Digi products. The table above
shows the different signals, along with the standard DB-25, DB-9 and
the EtherLite 8-pin RJ-45 pinout.

The most convenient method of mating DB-25 and DB-9 serial devices
to your EtherLite Port Server is to use RJ-45 to DB-25 and RJ-45 to DB­9 adapters. This allows the DTE/DCE selection to occur at the adapter,
while using “straight-through” modular cables. To assure CE
(Conformité Européenne

)

mark compliance (Europe), all serial cables
must be shielded. The following RJ-45 to DB-25 adapters are available
from Digi International, along with two-meter unshielded straight­through modular cables:

RJ-45 to DB-25 Adapters

Straight-through Crossover

PintoPin PintoPin

1to1 1to3
2to2 2to6
3to3 3to1
4to4 4to4
5to5 5to5
6to6 6to2
7to7 7to7
8to8 8to8

Pin 1

Pin x

RJ-45 Plug

13

1

14

25

Male DB-25

13

1

14

25

Female DB-25

Pin 1

Pin x

RJ-45 Plug

EtherLite

RJ-45 Pin

Signal DB-25 Pin DB-9 Pin

1RTS (out)4 7
2DSR (in)6 6
3DCD (in)8 1
4RxD (in)3 2
5TxD (out)2 3
6GND7 5
7 DTR (out) 20 4
8CTS (in)5 8

P/N 76000450

(DTE to Modems)

P/N 76000451

(DCE to Terminals/Printers)

RJ-45

Jack

Signal

DB-25

Male

RJ-45

Jack

Signal

DB-25

Male

1RTS4 1RTS5
2DSR6 2n/c6
3 DCD 8 3 DCD 20
4RxD3 4RxD2
5TxD2 5TxD3
6GND7 6GND7
7 DTR 20 7 DTR 8
8CTS 5 8CTS 4