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EK-DEHUA-IN-A01

August 1993

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Document:	DEChub ONE Installation
Order Number:	EK-DEHUA-IN
Revision:	A01
Pages:	10
Original Filename:

OCR Text

DEChub ONE
INSTALLATION

LKG–8350–93I

DEChub ONE
PK–07473–IL

The DEChub ONE, when combined with a DEChub 900 full-height network module, forms a
single-slot hub. This allows a network module to operate in a standalone configuration, independently of the DEChub 900 MultiSwitch. In single-slot hub configuration, the DEChub ONE
provides dc power and connections to the network module, which include a setup port to configure an attached network module, an out-of-band management (OBM) port for network module management, and an Attachment Unit Interface (AUI) port for Ethernet connection. The
AUI port connects the network module to a LAN (backbone) either directly or by using a
Medium Attachment Unit (MAU).

EK–DEHUA–IN. A01

Copyright
EK–DEHUA–IN. A01
August 1993
The information in this document is subject to change without notice and should not be
construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any errors that may appear in this document.
Copyright  1993 by Digital Equipment Corporation
All Rights Reserved.
Printed in U.S.A.

The following are trademarks of Digital Equipment Corporation:

FCC NOTICE – Class A Computing Device:
This equipment generates, uses, and may emit radio frequency energy. The equipment has been
type tested and found to comply with the limits for a Class A computing device pursuant to Subpart
J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such radio
frequency interference when operated in a commercial environment. Operation of this equipment
in a residential area may cause interference; in which case, measures taken to correct the
interference are at the user’s expense.

VCCI NOTICE – Class 1 Computing Device:
This equipment is in the 1st Class category (information equipment to be used in commercial
and/or industrial areas) and conforms to the standards set by the Voluntary Control Council for
Interference by Data Processing Equipment and Electronic Office Machines aimed at preventing
radio interference in commercial and/or industrial areas.
Consequently, when used in a residential area or in an adjacent area thereto, radio interference may
be caused to radios and TV receivers, etc.
Read the instructions for correct handling.

DEChub ONE

Front Panel and Packaging
The DEChub ONE is a member of the DEChub family of products. The figure shows a network
module attached to the DEChub ONE, forming a single-slot hub. A MAU, shown as item 7, is
available separately from Digital to connect to a LAN using twisted-pair,ThinWire, or fiber-optic
cables.
DEChub ONE Connectors, LED, and Optional Equipment

1) DEChub ONE
2) AC power connector
3) OBM port LED

9
1

4) 9-pin OBM port connector
5) Setup port connector
6) AUI port and slide latch
8
7) 15-pin MAU (not included)
8) Locking L-bracket

9) DEChub 900 full-height
network module

7
LKG–7462-93I

A DEChub ONE kit contains:
 DEChub ONE (Digital part number DEHUA–xx) and installation manual
 Power cord
 Locking L-bracket
 Rack-mount hardware
The following MAU options, and their installation manuals, are available separately. They connect
the DEChub ONE’s attached network module to a LAN or backbone:
 DETPM 10BaseT twisted-pair MAU
 DECXM 10Base2 ThinWire MAU
 DEFLM fiber-optic MAU

DEChub ONE

Installing a Network Module in a DEChub ONE
To install a DEChub 900 network module in a DEChub ONE to form a single-slot hub:
 Attach a network module to the DEChub ONE.

a. Loosen and lift the locking L-bracket screw on the DEChub ONE.
b. Place the mounting tab located on the bottom of the module into the mounting slot
on the bottom of the DEChub ONE.
c. Pivot the module into place to engage both the 160- and the 48-pin connectors.
d. Hold the network module and DEChub ONE together and tighten the locking
L-bracket screw. This secures the network module to the DEChub ONE and
activates the network module’s hot-swap switch.
Locking L-bracket

Network Module

DEChub ONE

Mounting
tab
PK–07464–IL

Connect the AUI port to the LAN.
After inserting a connector in the AUI port, move the AUI port slide latch outward (using
a small screwdriver) to secure the connection (see Connecting the AUI Port to a LAN).
Cables and MAUs are not supplied.
 Connect the power cord to the power connector and then to a wall outlet.
To connect to the setup and OBM ports, perform the following steps:
a. Connect the setup port (MJ8 RS-232 standard EIA-TIA-574) to a setup port device.
b. Connect the 9-pin male OBM port (RS-232 standard EIA-TIA-574 ) to a 9-pin
female interface connector. The OBM port LED lights to indicate that the port is in use.
4

DEChub ONE

Mounting the Single-Slot Hub
The single-slot hub may be placed on a table top or mounted in a 19-inch equipment rack.
To use it on a table top, attach four self-sticking rubber foot pads (provided) on the underside of the single-slot hub, placing 2 foot pads on the DEChub ONE and 2 foot pads on the
attached network module.
To mount a single-slot hub in a 19-inch equipment rack, follow these steps:

Connect the rack-mount brackets to the single-slot hub.
Align the screw holes on each end of the rack-mount brackets with the holes on the
DEChub ONE and network module and attach them using eight #6-32 flat-head screws.

Position and secure the single-slot hub unit in the equipment rack.
Align the screw holes on the rack-mount brackets with the equipment rack holes. Attach
the rack-mount single-slot hub to the rack using four #10-32 screws and U-nuts.

Connect the cables to the single-slot hub.
See the cabling section in this manual and in the network module installation manual for
information on cabling. Do not connect the power cord on the single-slot hub to a power
outlet at this time.

Provide strain relief for the cabling.
Use TyRaps or other suitable means to secure the cables to the rack along the raceways. Avoid placing undue strain on the cable connectors – do not tighten the TyRaps
excessively or exceed the nominal bend radius of the cables.

Connect the power cord to the single-slot hub power connector and then to an out

let on the rack or to a wall outlet.
Switch on the power and operate the module according to product recommendations.

DEChub ONE

Connecting the AUI Port to a LAN
The AUI Port can be
connected to a MAU
(available separately
from Digital), or to an
AUI cable (not provided)
that connects to a MAU
located on the LAN.
Connecting a MAU to the AUI port.
a. Insert a MAU transceiver into the AUI connector, as
illustrated, and slide the latch mechanism to lock the
MAU in place.
Note:
Some non-Digital MAUs may not fit into the
DEChub ONE’s AUI connector.
b. Connect the cabling (twisted-pair, ThinWire, or
fiber-optic) from the MAU to the LAN. Refer to the
documentation that is provided with the MAU for
additional cabling information.
Connecting Directly to the AUI Port.

LKG–7462-93I

a. You can cable the AUI port directly to a network
MAU on the LAN or backbone.
b. Connect the AUI cable to the AUI connector and
move the slide latch (using a small screwdriver) to
lock the connection securely.
Connect the other end of the AUI cable to a network
MAU on the LAN.
The cables Digital recommends for use with the AUI
port are listed in the following table:
Cable

Description

BNE3H–xx 1
BNE3K–xx

PVC-insulated with straight connector
PVC-insulated with right-angle connector

1 The xx represents the length in meters.

DEChub ONE

Using the Setup Port
You can connect a setup port device (terminal device, personal computer, or terminal server) to
the setup port connector on the single-slot hub using various cables and adapters. This allows
you to use the setup port to configure the attached network module’s parameters. The default
speed for the setup port is 9600 baud.
The setup port provides access to the setup port menu for the attached network module. This
menu and the setup parameters are described in the documentation for the attached network
module. Not all network modules support the setup port. Refer to the documentation for the
specific network module for additional information.
The signals for the setup port connector are listed in the following table:
Setup Port (shielded MJ-8) Pin Out
Pin

Signal Name

1
2
3
4
5
6
7
8

No connect
Receive (RX)
Ground
No connect
No connect
Transmit (TX)
Always high (+5 Vdc)
Always low

The cable/adapters are listed in the following table:
Setup Port Cabling
Cable/Adapter Type

Connecting Device

BN24H–xx 1
BN24H–xx/H8871-J
BN24H–xx/H8575-J

Terminal with 6–pin MMJ connector
Terminal with 9-pin D-sub connector
Terminal with 25-pin D-sub connector

1 The xx represents the length in meters.

DEChub ONE

Using the OBM Port
The signals on the OBM Port conform to standard EIA-574, which is based on EIA-232D, but
uses a 9-pin (DB9) connector, instead of a 25-pin connector. EIA-574 is the signaling standard used by the serial ports on most personal computers. The OBM port appears as a data
terminal equipment (DTE) device. The port can be connected to a modem by using a standard
AT modem cable.
When the DEChub ONE has an OBM connection to an attached network module, the network
module becomes manageable using Simple Network Management Protocol (SNMP) over
Serial Line Interface Protocol (SLIP). Not all network modules support the OBM port. Refer
the DEChub 900 MultiSwitch Owner’s Manual for more OBM information.
The signals for the OBM port DB9 connector are listed in the following table:
OBM Port (DB9) Pin Out
Pin

Signal Name

1
2
3
4
5
6
7
8
9

Data Carrier Detect (DCD)
Receive Data (RXD)
Transmit Data (TXD)
Data Terminal Ready (DTR)
Ground
Data Set Ready (DSR)
Request to Send (RTS)
Clear to Send (CTS)
No connect

OBM Port Cabling
The OBM port cable/adapters are listed in the following table:
Cable/Adapter Type

Connecting Device

BN24H–xx 1 /H8571-J

DECserver 900TM, DECserver 900TL, or DECserver 90M
with 8-pin MJ connector

BC29Q–10

PC with 9-pin D-sub connector

BC29P–10

Modem with 25-pin D-sub communications port

1 The xx represents the length in meters.

DEChub ONE

Problem Solving
If ...

Then ...

Do This ...

Power LED is off on the attached
network module.

The single-slot hub has no power
input.

Ensure that the ac power cord is
properly connected to the
DEChub ONE and wall outlet.
Check the wall outlet power.
Ensure that the hot-swap switch
is properly engaged and reseat
the connectors.

The DEChub ONE fan runs
continuously.

Reseat the connectors.
If the fan still runs, replace
the attached network module.

The fan is not running.

Separate the network module
from the DEChub ONE.
If fan still does not run, replace
the DEChub ONE.
If the fan begins running, replace the network module.

Power LED is flashing on the
attached network module.

The DEChub ONE fan runs intermittently.

Separate the module from the
DEChub ONE.
If the fan continues to run
intermittently, replace the
DEChub ONE.
If the fan begins to run continuously, troubleshoot or replace
the network module using its
problem-solving recommendations.

The MAU Power OK LED is off
and the Power LED on the
attached network module is on.

The MAU does not have power.

Ensure that the MAU is properly
connected to the AUI port and
that the slide latch is secure.
Refer to the MAU documentation
for proper cabling.
If the MAU is properly connected,
replace the DEChub ONE.

The OBM port LED is off, and
the Power LED on the attached
network module is on.

Either the OBM port is not in use,
or the OBM LED is faulty.

Ensure that the network module
supports OBM (has modem
capability) and that the OBM port
is in use.
If the DEChub ONE is not the
problem, troubleshoot or replace
the network module using its
problem-solving recommendations.

DEChub ONE

Product Specifications
Product Specification

DEChub ONE

Single-Slot Hub

Height
Width
Depth

44.45 cm (17.5 in)
4.45 cm (1.75 in)
10.16 cm (4.0 in)

44.45 cm (17.5 in)
4.45 cm (1.75 in)
25.4 cm (10.0 in)

Weight

1.59 kg (3.5 lb)

3.4 kg (7.5 lb)

Operating temperature 5° C to 50° C (41° F to 122° F)

5° C to 50° C (41° F to 122° F)

Relative humidity

10% to 95% non-condensing

Altitude

Sea level to 4900 m (16,000 ft)

Input power

100 Vac to 120 Vac @ 2 A
220 Vac to 240 Vac @ 1 A

Output power

40.0 W @ +5.0 Vdc
7.2 W @ +12.0 Vdc
37.5 W @ +15.0 Vdc

Total power is the sum of
the DEChub ONE power
and network module power

Connectors

RJ-45, DB-9, 15-pin AUI

Agency certification

CE, CSA, FCC, TÜV, UL,
VCCI, VDE

Acoustics:
Declared values per
ISO 9296 and ISO 77791
Product, DEHUA

Idle/Operate
Sound Power Sound Pressure
Level LWAd, B Level LpAm, dBA
5.1

Schallemissionwerte:
Werteangaben nach
ISO 9296 und
ISO 7779/DIN EN277792
Produkt, DEHUA

Leerlauf/Betrieb
Schalleistungspegal Schalldruckpegal
LWAd, B
LpAm, dBA

N/A
N/A

Idle/Operate
Sound Power
Sound Pressure
Level LWAd, B
Level LpAm, dBA
37
Leerlauf/Betrieb
Schalleistungspegal Schalldruckpegal
LWAd, B
LpAm, dBA

5,1

1 Current values for specific configurations are available from Digital Equipment representatives. 1 B = 10 dBa.
2 Aktuelle Werte für spezielle Ausrüstungsstufen sind Über die Digital Equipment Vertretungen erhältlich. 1 B = 10 dBa.

Associated Documents
DEChub 900 MultiSwitch Owner’s Manual
Open DECconnect Building Wiring Components and Application
DEChub 900 full-height network module installation manuals
MAU transceiver installation manuals: EK-DECXM-IC, EK-DEFLM-IC, or EK-DETPM-IC
10

DEChub ONE