USER
MANUAL
MODEL 1004ABRC
High Speed,Multipoint
Short Range Modem:
Rack Mount Card
CERTIFIED
An ISO-9001
Certified Company
Part# 07M1004ABRC-A
Doc# 047053UA
Revised 09/02/99
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
http://www.patton.com
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TABLE OF CONTENTS
Section Page
1.0 Warranty Information.............................................................2
1.1 Radio and TV Interference
1.2. CE Notice
1.3 Service
2.0 General Information...............................................................4
2.1 Features
2.2 Description
3.0 Configuration..........................................................................5
3.1 Front Card Configuration
3.1.1 Switch Setting - Modem A
3.1.2 Switch Setting - Modem B
3.2 Rear Card Configuration
3.2.1 Rear Card Strap Settings
4.0 Installation ...........................................................................14
4.1 The Model 1000R16 Rack Chassis
4.1.1 The Rack Power Supply
4.2 Installing the Model 1004ABRC into the Chassis
4.3 RS-232 Connection
4.4 Twisted Pair Connection
4.4.1 Point-to Point Twisted Pair Connection
4.4.2 Multipoint Twisted Pair Connection
5.0 Operation .............................................................................19
5.1 LED Status Monitors
5.2 Power-Up
Appendix A - Specifications........................................................20
Appendix B - Cable Recommendations......................................21
Appendix C - Factory Replacement Parts..................................22
Appendix D - Interface Pin Assignments....................................23
1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model 1004ABRC components to
be free from defects, and will—at our option—repair or replace the
product should it fail within one year from the first date of shipment.
This warranty is limited to defects in workmanship or materials,
and does not cover customer damage, abuse or unauthorized modification. If this product fails or does not perform as warranted, your sole
recourse shall be repair or replacement as described above. Under no
condition shall Patton Electronics be liable for any damages incurred
by the use of this product. These damages include, but are not limited
to, the following: lost profits, lost savings and incidental or consequential damages arising from the use of or inability to use this product.
Patton Electronics specifically disclaims all other warranties,
expressed or implied, and the installation or use of this product shall be
deemed an acceptance of these terms by the user.
1.1 RADIO AND TV INTERFERENCE
The Model 1004ABRC generates and uses radio frequency energy, and if not installed and used proper ly—that is, in strict accordance
with the manufacturer's instructions—may cause interference to radio
and television reception. The Model 1004ABRC has been tested and
found to comply with the limits for a Class A computing device 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 Model
1004ABRC does cause interference to radio or television reception,
which can be determined by turning the power off or disconnecting the
RS-232 interface, the user is encouraged to try to correct the interference by one 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).
In the event the user detects intermittent or continuous product malfunction due to nearby high power transmitting radio frequency equipment, the user is strongly advised to take the following steps:use only
data cables with an external outer shield bonded to a metal or metalized connector; and, configure the rear card as shown in section 3.2.1
of this manual.
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1.2 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 Union European
(EU). A Certificate of Compliance is available by contacting Technical
Support.
1.3 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:
Tel: (301) 975-1007
Email: support@patton.com.
www: http://www.patton.com
Patton Electronics' technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model 1004ABRC. Technical Service hours: 8AM to 5PM EST,
Monday through Friday.
2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is warranted for One Year parts and labor. If any questions during installation or
use of the 1004ABRC, contact Patton Electronics Technical Support at
(301) 975-1007.
2.1 FEATURES
• Convenient rack card features tw
o shor t range modems
• Data rates to 115.2 Kbps
• Multi-point Operation on Data Transitions -- No need for
Hardware Control Signals
• Supports up to 50 multipoint drops in a polling environment
• Passes transmit & receive data
• Variable high/low impedance settings
• Operates with or without local “echo”
• Features 6 easy-to-read LEDs
• Silicon Avalanche Diode surge protection
• Fits conveniently in Patton’s rack chassis
2.2 DESCRIPTION
The Model 1004ABRC high speed, multipoint short range modem
rack card is a
dual
rack card incorporating two short range modems.
Both units support asynchronous data rates to 115.2 Kbps over 1 or 2
twisted pairs and support distances to 4000 feet (19 AWG @19.2
kbps). In addition, Model 1004ABRC’s unique data control feature
allows it to be used in multi-point environments without the use of hardware control signals.
The Model 1004ABRC can handle up to 50 terminal drops in a
multipoint polling environment. Using transitions on the data line to
handle line contention, the Model 1004ABRC can be used in environments that need multi-port bus contention, but do not have control signals such as RTS or DTR. The Model 1004ABRC may be configured
for high or low impedance operation, and the unit can operate with or
without “echo”.
Filling one function card slot on Patton’s Model 1000R16 rack
chassis, the Model 1004ABRC is available with RJ-11 or RJ-45 rear
interface cards. For workgroup and desktop communications, the
Model 1004ABRC also fits in Patton’s 2, 4 and 8 slot ClusterBoxes™.
The combination of rack mount, ClusterBox™ and self-powered units
provides a completely integrated “networking”solution.
NOTE: Packages received without an RMA number will not be
accepted.
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3.0 CONFIGURATION
This section describes the location and orientation of the Model
1004ABRC's configuration switches, provides detailed instructions on
setting each switch and describes the settings for each of the rear connection cards.
3.1 FRONT CARD CONFIGURATION
The Model 1004ABRC front card houses two short hauls–Modem
A and Modem B–
each
using two sets of DIP switches. The locations
of these switches are shown in Figure 1 (below). These switches are
accessible when the card is slid out of the rack chassis. Once configured, the Model 1004ABRC is designed to operate transparently, without need for frequent re-configuration.
Each of the DIP switches on the Model 1004ABRC function card is
a 4-position switch. Figure 2 (below) shows the On/Off orientation of
these switches. Use a small screw driver or similar instrument to set
each individual switch.
3.1.1 SWITCH SETTINGS - MODEM “A”
DIP switches S1 and S2 configure short range Modem A on the
Model 1004ABRC front card. The tables below provide an overview of
Modem A switch settings, including factory default settings. Following
the tables is a descriptions of each switch’s function.
SWITCH SET “S1”
DIP switch S1 is used to configure receive impedance,
RTS/CTS delay, carrier control operation and “echo” enable/disable.
The summary table below shows the factory default settings for switch
S1. Following the summary table is a detailed description of each individual switch.
S1-1: Receive Impedance
The setting for switch S1-1 selects the impedance of the input
receiver. You may select either a “low” impedance of 120 Ohms or a
“high” impedance of 16K Ohms. By selecting the proper impedance for
each drop, there may be up to 50 receivers in one application.
S1-1
Setting
On Low (120 Ohm)
Off High (16K Ohm typical)
S1-2: RTS/CTS Delay
The setting for switch S1-2 determines the amount of delay
between the time the Model 1004ABRC “sees” RTS and when it turns
on CTS. Note: RTS/CTS Delay setting should be based upon transmission timing.
S1-2
Setting
On 8 msec
Off no delay
Figure 1. Model 1004ABRC Card, showing location of configuration switches.
ON
OFF
Figure 2. Close-up of DIP switches, showing ON/OFF orientation.
1234
ON
S2
S1
S3
S4
SWITCH S1 SUMMARY TABLE (factory defaults in bold)
Position Function ON Position OFF Position
S1-1 RX Impedance 120 Ohm 16K Ohm
S1-2 RTS/CTS Delay 8 msec No Delay
S1-3 Reserved - Default Setting
S1-4 Echo Mode Echo ON Echo OFF
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