Digi EL 2 Owner's manual

90033900 B
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
A.C Power Requirements (maximum)
100-240 VAC, 50-60 Hz
15W (15VA) for units with less than 32 ports
25W (25VA) for 32-port units
CAUTION: To prevent electric shock, do not remove the
cover of an EtherLite module. There are no user-serviceable
parts inside. Refer servicing to qualified personnel.
Co
py
ri
g
ht
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., 1999
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 “asis”, 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 changesin 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 periodicallymade
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 115Kbps or 230Kpbs on all ports simulta-
neously. This table shows all EtherLite models and their capabilities.
EtherLite Models
* Individual ports are confi
g
urable as either EIA-232 or EIA-422.
** 115Kbps is not attainable on all ports simultaneously on the EL-32.
Installing the EtherLite Software
Install the hardware before you install the device driver software. Follow
the software installation instructions included on the Access Resource
CD.
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 Hardware
1. Write theEthernetaddress 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.
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.
Model Serial
Ports Port Protocol Ethernet Connection Maximum Baud Rate
EL 2 2 EIA-232 10BASE-T 230Kbps
EL 2 2 EIA-422 10BASE-T 230Kbps
EL 2 2 EIA-485 10BASET 230Kbps
EL 8 8 EIA-232 10BASE-T 115Kbps
EL 16 16 EIA-232 10BASE-T 115Kbps
EL 32 32 EIA-232 10BASE-T 115Kbps**
EL 160 16 EIA-232 10/100BASE-T 230Kbps
EL 162 16 EIA-232 or
EIA-422* 10/100BASE-T 115Kbps

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
requiresthat the twisted pairsbe used for specific pairs of pins: 1&2,
3&6, 4&5, and 7&8.
RJ-45 Pinouts
3. Connect the power supply to your unit and an AC outlet. If your unit
has an internal power supply, connect the power cord to the unit and
an AC outlet.
4. Power up the unit. The power LED on the front of the cabinet will
flicker while awaiting BOOTP or DHCP service from a host. (It will
remain flickering until the unit has been served an IP address by
either a bootp or DHCP server.) After an IP address has been
received, this LED will remain steadily lit. Verify that the Link LED
is on. If the Link LED is not on and the ON LED is still flickering,
verify that you are using the correct cable type. Also verify that the
hub and Ethernet host are powered. If the ON LED is flashing
slowly, notify Digi Technical Support.
5. If the unit does not operate properly, verify that it has power and that
both LEDs are on.
Rack Mount Installation
For the EtherLite 32, a rack mount kit is included. The rack mount brack-
ets 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.
CAUTION: Do not remove the top cover as AC power is then
accessible!
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 3.2 lbs.
• 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 con-
nection 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 ports implemented with8-pin
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
IMPORTANT: 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 tableabove showsthe
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 ELPS is to use RJ-45 to DB-25 and RJ-45 to DB-9 adapters. This
allows the DTE/DCE selection to occur at the adapter, while using
“straight-through” modular cables. To assure CE 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 straight-through modular cables (SA-0024):
RJ-45 to DB-25 Adapters
Straight-through Crossover
PintoPin PintoPin
1to1 1to3
2to2 2to6
3to3 3to1
4to4 4to2
5to5 5to4
6to6 6to5
7to7 7to7
8to8 8to8
Pin 1 Pin x
RJ-45 Plu
g
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 Si
g
nal DB-25 Pin DB-9 Pin
1RTS(out)4 7
2DSR(in) 6 6
3DCD(in) 8 1
4RxD(in) 3 2
5 TxD (out) 2 3
6GND 7 5
7DTR(out)20 4
8CTS(in) 5 8
P/N 76000450
(DTE to Modems) P/N 76000451 (DCE to Terminals/Printers)
RJ-45
Jack Si
g
nal DB-25
Male RJ-45 Jack Si
g
nal DB-25
Male
1RTS4 1RTS5
2DSR6 2DSR6
3 DCD 8 3 DCD 20
4RxD3 4RxD3
5TxD2 5TxD2
6GND7 6GND7
7 DTR 20 7 DTR 8
8CTS5 8CTS4