Patton electronics 3080/V24 Installation And Operation Manual

B

DIGIT A L SHARING DEVICE

Doc #: 124001UA

Part #: 07M3080-A

3080/V24

(CTS DSD-8)

INSTALLATION AND OPERATIONS MANUAL

August 23, 2000

An ISO-9001

Certified Company

Copyright© 2000 Patton Electronics Co., All Rights Reserved

PATTON ELECTRONICS CO. INSTALLATION AND OPERATIONS MANUAL

3080/V24

124001UA

PROPRIETARY NOTICE

The information contained herein is proprietary and confidential to Patton Electronics Co. Any reproduction or
redistribution of this publication, in whole or in part, is expressly prohibited unless written authorization is given by

Electronics Co.

Patton

WARRANTY NOTICE

WARRANTIES: Patton Electronics Co. (hereafter referred to as Patton) warrants that its equipment is free from any
defects in materials and workmanship. The warranty period shall be two years from the date of shipment of
equipment. Patton’s sole obligation under its warranty is limited to the repair or replacement of the defective
equipment, provided it is returned to Patton, transportation prepaid, within a reasonable period. This warranty will not
extend to equipment subjected to accident, misuse, alterations or repair not made by Patton or authorized by Patton in
writing.

PUBLICATION NOTICE

This manual has been compiled and checked for accuracy. The information in this manual does not constitute a
warranty of performance. Patton reserves the right to revise this publication and make changes from time to time in the
content thereof. Patton assumes no liability for losses incurred as a result of out-of-date or incorrect information
contained in this manual.

RADIO AND TV INTERFERENCE

The Patton MSDs generate and use radio frequency energy, and if not installed and used properly—that is, in strict
accordance with the manufacturer’s instructions—may cause interference to radio and television reception. The Patton
MSDs have been tested and found to comply with the limits for Class A computing devices in accordance with the
specifications in Subpart J of Part 15 of FCC rules, which are designed to provide reasonable protection from such
interference in a commercial installation. However, there is no guarantee that interference will not occur in a particular
installation. If the Patton MSDs do cause interference to radio or television reception, which can be determined by
disconnecting the cables, the user is encouraged to try to correct the interference by one or more of the following
measures: moving the computing equipment away from the receiver, re-orienting the receiving antenna, and/or
plugging the receiving equipment into a different AC outlet (such that the computing equipment and receiver are on
different branches).

CE NOTICE

The CE symbol on your Patton Electronics equipment indicates that it is in compliance with the electromagnetic
Compatibility (EMC) directive and the Low Voltage Directive (LVD) of the European Union (EU). A Certificate of
Compliance is available by contacting Technical Support.

SERVICE

All warranty and non-warranty repairs must be returned freight prepaid and insured to Patton Electronics. All returns
must have a Return Materials Authorization number on the outside of the shipping container. This number may be
obtained from Patton Electronics Technical Support at:

tel: [phone];
email: [e-mail];
or, www: http://www.patton.com.
NOTE: Packages received without an RMA number will not be accepted.

Patton Electronics’ technical staff is also available to answer any questions that might arise concerning the installation
or use of your Patton MSDs. Technical Support hours: 8AM to 5PM EST, Monday through Friday.

Copyright© 2000 Patton Electronics Co., All Rights Reserved

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INSTALLATION AND OPERATIONS MANUAL

124001UA

PATTON ELECTRONICS CO.

3080/V24

EMISSION REQUIREMENTS
FCC CLASS A

Warning: Changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user’s authority to operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of FCC rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct the
interference at his own expence.

CANADIAN EMISSIONS

This digital apparatus does not exceed the Class A limits for noise emissions from a digital
apparatus set out in the Radio Interference Regulations of the Canadian Department of
Communications.

Le present appareil numerique n’emet pas de bruits redioelectriques depassant les limites
applicables aux appareils numeriques de la Class A prescites dans le Reglement sur le
brouillage redioelectrique edicte par le ministere des Communications du Canada.

VDE Emissionen

Anhang 2 zur Anlage 1 zur AmtsblVfg 243/1991
Bescheinigung des Herstellers / Importeurs
Hiermit wird bescheinigt, daß der/die/das

8 Port Digital Sharing Device, 3080/V24 (CTS DSD-8), 124000
(Gerät, Typ, Bezeichnung)
in Übereinstimmung mit den Bestimmungen der BMPT-AmtsblVfg 243/1991 funkentstört ist.
Der vorschriftsmäßige Betrieb mancher Geräte (z.B. Meßsender) kann allerdings gewissen
Einschränkungen unterliegen. Beachten Sie deshalb die Hinweise in der
Bedienungsanleitung.

Dem Zentralamt für Zulassungen im Fernmeldewesen wurde das Inverkehrbringen dieses
Gerätes angezeigt und die Berechtigung zur Überprüfung der Serie auf die Einhaltung der
Bestimmungen eingeräumt.

Patton Electronics Co.

7622 Rickenbacker Drive

Gaithersburg, Maryland, USA 20879

(Name und Anschrift des Herstellers / Importeurs)

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PATTON ELECTRONICS CO. INSTALLATION AND OPERATIONS MANUAL

3080/V24

124001UA

Table of Contents

CHAPTER 1 - OPERATION

Channel Clocking ...............................................................................................................................1-1

Channel Interface .............................................................................................................................. 1-1

Anti-streaming ....................................................................................................................................1-2

Channel Selection Modes .................................................................................................................1-3

Channel Tail Circuits .........................................................................................................................1-4

Interface Connections ....................................................................................................................... 1-4

Front Panel LEDs ..............................................................................................................................1-4

Channel Enable / Disable Switches ..................................................................................................1-4

Power Supply.....................................................................................................................................1-4

CHAPTER 2 - SETUP AND INSTALLATION

Power Connection .............................................................................................................................2-1

Factory Configuration Switch Settings .............................................................................................. 2-1

Disassembly ...................................................................................................................................... 2-2

Installation.......................................................................................................................................... 2-2

Equipment Grounding (SW27-6).......................................................................................................2-2

CTS Delay (SW31-3,4,5)...................................................................................................................2-3

Anti-Streaming (SW28-4,5,6 and SW29-3) ....................................................................................... 2-3

Receive Data Mode (SW29-4) ..........................................................................................................2-3

Control Turn-Off Delay in “DATA” Switching Mode (SW29-1,2) ...................................................... 2-4

Switch on Data / Control (SW29-5,6)................................................................................................2-4

Internal Baud Rates (SW30-1,2,3,4)................................................................................................. 2-4

Fallback Clock Enable (SW-30-6) .....................................................................................................2-5

Fallback Clocking From Sub-Channel 6 (SW30-1,2,3)..................................................................... 2-5

Fallback Mode Selection (SW30-5) ...................................................................................................2-5

TX Clock Source Selection (SW27--1,2,3) ........................................................................................2-5

TX Clock Pin Selection (SW27-4) .....................................................................................................2-5

RX Clock Source Selection (SW28-1,2,3) ........................................................................................ 2-6

Tail Circuit Buffer (SW31-1) ..............................................................................................................2-6

Port DCE/DTE Selection (SW9 thru SW26) .....................................................................................2-7

Test Voltage Enable Pins 9 & 10 (JP4 & JP5)..................................................................................2-7

DTR / DSR Forced Active (JP6 thru JP14)....................................................................................... 2-8

FACTORY Test Jumpers (JP1, JP2 and JP3)..................................................................................2-8

APPENDIX

Typical Application............................................................................................................................ A-1

Typical Tail Circuit Configuration ..................................................................................................... A-1

Interface Pins Supported.................................................................................................................. A-1

Master DTE / Sub-Channel DTE Interface Flow Diagram............................................................... A-2

Master DTE / Sub-Channel DCE Interface Flow Diagram .............................................................. A-2

Master DCE / Sub-Channel DTE Interface Flow Diagram .............................................................. A-3

Master DCE / Sub-Channel DCE Interface Flow Diagram .............................................................. A-3

TECHNICAL SPECIFICATIONS...................................................................................................... A-4

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PATTON ELECTRONICS CO.INSTALLATION AND OPERATIONS MANUAL

3080/V24

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CHAPTER 1 - OPERATION

The Patton 3080/V24 (CTS DSD-8) is a network enhancement accessory intended for high
speed synchronous or asynchronous Modem, or port sharing applications. The 3080/V24
(CTS DSD-8) allows for immediate expansion of a system without the requirement of
additional communication lines. The 3080/V24 (CTS DSD-8) allows any combination of up to
eight DCE or DTE devices to share a single DCE or DTE high speed link in a point-to-point or
multi-point polled network.

Channel Clocking

The Patton 3080/V24 (CTS DSD-8) is protocol transparent and operates in synchronous and
asynchronous environments at data rates up to 76,800bps, depending on cable length and
attached equipment. Clocking can be derived from the Master Port clock, (pins 15 or 24 for
TXC and 17 for RXC), the internal clock generator or any Sub-Channel 1 through 6 (pins 15 or
24 for TXC and 17 for RXC).

Fallback Clocking

In the event of loss of an externally provided clock or optionally Sub-Channel 1 DCD becoming
inactive, the 3080/V24 (CTS DSD-8) has the ability to automatically fall back to the
predetermined internal baud rate clock or the Sub-Channel 6 RX Clock (pin 17).

Channel Interface

The 3080/V24 (CTS DSD-8) has nine DB-25 female connectors located on the rear of the unit.
Each connector is pinned with EIA RS-232, using RS-423 electrical characteristics. This
enables extended cable driving distances, which often bypasses the need for line drivers.
Each port is DCE/DTE selectable, which eliminates the need for a crossover cable. DSR or
DTR can additionally be forced to the active state individually on each Sub-Channel by Jumper
control.

3080/V24

SUB-CHANNEL STATUS

ACTIVE

ANTI-STREAM

Pwr SD RD

FBC

1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

1-1

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OPERATION

124001UA

Anti-streaming

PATTON ELECTRONICS CO.

3080/V24

INSTALLATION AND OPERATIONS MANUAL

A typical problem often encountered is a

“STREAMING”

remote terminal. The streaming
problem can tie up an entire circuit until the offending device has recovered or is powered
down. A streaming condition occurs when a Sub-Channel remains active, disrupting the
polling sequence. The 3080/V24 (CTS DSD-8) provides two user selectable modes of
controlling a streaming condition, an automatic anti-streaming Abort Timer with eight
selectable block lengths and a setting to disable anti-streaming for large data block transfers,
and a manual Operator Control mode (front panel push button switch).

Automatic Anti-streaming

- Automatic Anti-streaming will block the asserted control signal
from the Sub-Channel Port, releasing the 3080/V24 (CTS DSD-8) to accept requests from any
other Sub-Channel that has not been locked out due to a streaming condition. When a Sub­Channel is locked out for streaming, a visual indication, by Sub-Channel, is provided on the
front panel.

will still be broadcast to locked out Sub-Channels

Any data sent to the Master Port by the streaming device will be lost, but data

. Once a Sub-Channel is locked out due to
streaming, the Sub-Channel will remain locked out until the attached device removes the
streaming condition. When configured for “Switch on RTS” Mode, if RTS is held active, RTS
must become inactive. When configured for “Switch on Data” Mode, if continuous data
transitions have triggered the Anti-Stream logic, the transitions must stop before the DSD-8
will clear the Anti-Stream logic to that Sub-Channel. Removing the Sub-Channel via the front
panel disable switch will not clear the Anti-stream logic for a Sub-Channel once it has been
activated.

Manual Anti-Stream

- If manual Anti-Stream protection is chosen, a streaming condition
caused by one of the attached terminals can be quickly corrected by the 3080/V24 (CTS
DSD-8) via the associated front panel locking switches. A switch is provided for each Sub­Channel and permits the rapid removal of a streaming terminal without having to disconnect
any cables or power down the offending terminal. Terminals may be selectively removed for
self-test and maintenance without affecting the remaining Sub-Channels. Once the streaming
condition has been corrected, the front panel switch is simply depressed to the locked
(Enable) position (Green indicator ON) to re-establish normal operation. Removing a Sub­Channel with the front panel switch will block data from the Sub-Channel going to the Master
Port but will not block data going from the Master Port to the Sub-Channel.

Channel Selection Modes

The 3080/V24 (CTS DSD-8) provides two selectable Sub-Channel service modes of
operation, the Scanning Mode and Priority Mode. Depending on system requirements, either
mode may be selected by internal DIP switch settings. Both modes switch on activity from the
Sub-Channel.

OPERATION

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PATTON ELECTRONICS CO.INSTALLATION AND OPERATIONS MANUAL

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In the Scanning Mode the 3080/V24 (CTS DSD-8) scans each Sub-Channel, in sequence,
beginning with Sub-Channel 1. This rotational sequence is repeated continually with each
attached Sub-Channel having equal access to the communications link. When data or control
lines from a Sub-Channel become active that Sub-Channel is switched through to the master
port by the 3080/V24 (CTS DSD-8). All remaining Sub-Channels are locked out until the first
device becomes inactive. When the Sub-Channel device becomes inactive, the 3080/V24
(CTS DSD-8) will resume scanning the Sub-Channels for another active signal.

When configured for Priority Mode operation, the 3080/V24 (CTS DSD-8) monitors all Sub­Channels simultaneously with Sub-Channel 1 having the highest priority. When a Sub-Channel
becomes inactive, the 3080/V24 (CTS DSD-8) will automatically default to the highest priority
(lowest number) Sub-Channel with activity.

Contention for the Master port is accomplished by asserting RTS (Request to Send) if the
Sub-Port is configured as a DCE, DCD (Data Carrier Detect) if the Sub-Port is configured as
a DTE or Data Transitions from the attached Sub-Channel devices in either configuration. The
active interface lead RTS or DCD can be selected on an individual basis for each Sub­channel, selection of contention mode,

“Data Transitions”

or

“Interface Lead”

activation is
selected in Sub-channel groups. Sub-channels 1 thru 4 are the first group and Sub-channels 5
thru 8 are the second group. All Sub-channels in a group will be set to the same contention
mode, either

“Data Transitions”

or

“Interface Lead”

activation. Once a Sub-Channel asserts
an active control signal, that control signal will be passed through to the Master Port,
depending on DTE / DCE configuration of the Sub-Channel and Master Port. This control will
be passed without delays. If the Master Port is configured as a DTE the signal will be passed
as RTS. The CTS returned to the Master will have an optional delay added before the signal is
returned to the Sub-Channel port.

Port Enable / Disable, front panel switches must be pushed in (GREEN indication) for a Sub­Channel to access the Master Port regardless of the mode of operation selected.

Channel Tail Circuits

A buffer is built into the unit for tail circuit (DCE to DCE) applications. An 8 bit centered ring
buffer is used to correct the clock phasing errors generated between the Modem on the
Master Port and the Sub-Channel port for the data transferred from the Sub-Channel to the
Master Port. If the unit is operated in an asynchronous environment the buffer must be
bypassed. This is accomplished by moving the SYNC/ASYNC switch to ASYNC.

1-3

OPERATION