USER
MANUAL
MODEL 1200/1201
Synchronous
Modem Eliminator
An ISO-9001
Certified
Company
P/N: 07M1200-C
Doc# 049011U
Rev. D
Revised 1/22/08
SALES OFFICE
,
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
1.0 Warranty Information ................................................................. 5
1.1 Warranty Statement...................................................................... 5
1.2 Radio and TV Interference............................................................ 5
1.3 CE Notice...................................................................................... 6
1.4 Service.......................................................................................... 6
2.0 General Information.................................................................... 7
2.1 Features........................................................................................ 7
2.2 Description.................................................................................... 7
3.0 Installation................................................................................... 8
4.0 Configuration .............................................................................. 9
4.1 Data Rate...................................................................................... 9
4.2 Carrier Detect ............................................................................... 9
4.3 RTS/CTS Delay .......................................................................... 10
4.4 Ground........................................................................................ 10
5.0 Operation................................................................................... 11
5.1 LED Status Indicators (Model 1201 only) ................................... 11
A Specifications ........................................................................... 12
A.1 Data Rates .................................................................................. 12
A.2 Clocking ...................................................................................... 12
A.3 Grounding ................................................................................... 12
A.4 Range ......................................................................................... 12
A.5 Functional ................................................................................... 12
A.6 RTS/CTS Delay ........................................................................... 12
A.7 DCD ............................................................................................ 12
A.8 Ring Indicator ............................................................................. 12
A.9 Interface ...................................................................................... 12
A.10 Connectors ................................................................................. 12
A.11 Power Supply .............................................................................. 12
A.12 Altitude ........................................................................................ 12
A.13 Humidity ...................................................................................... 12
A.14 Dimensions ................................................................................. 12
B Block Diagram........................................................................... 13
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1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model 1200/1201 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.
1.1 WARRANTY STATEMENT
Patton Electronics warrants all Model 2701RC Series 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. This product contains no serviceable parts; therefore the user shall not attempt to
modify the unit in any way. 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 war-
ranties, expressed or implied, and the installation or use of this product
shall be deemed an acceptance of these terms by the user. 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 use only data cables with an external outer shield
bonded to a metal or metalized connector.
1.2 RADIO AND TV INTERFERENCE
The Model 1200/1201 generates and uses 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 Model 1200/1201 has been tested and found to comply
with the limits for a Class A computing device in accordance with specifications in Subpart B 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 1200/1201 does cause
interference to radio or television reception, which can be determined by
disconnecting the unit , 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).
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1.3 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.
This device is not intended to be connected to the public
telephone network.
Caution
1.4 SERVICE
All warranty and nonwarranty 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 Services at:
• Tel: +1 (301) 975-1007
• Email: support@patton.com
• URL: http://www.patton.com
Note Packages received without an RMA number will not be
accepted.
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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 or problems arise during
installation or use of this product, please contact Patton Electronics
Customer Service at (301) 975-1007.
2.1 FEATURES
• Smallest synchronous modem eliminator available
• Data rates to 38.4 Kbps
• Synchronous cable runs to 300 feet on each side of device
• Constant or RTS controlled carrier selections
• RTS-CTS delay options of 0mS, 6.6mS or 53mS
• DB-25 connector on each end
• Half or full duplex
• Internal or external clocking
• No external power required
• LEDs monitor data and control signals (Model 1201 only)
2.2 DESCRIPTION
Measuring only 5.3 x 2 x 1.2 inches, the Patton Model 1200 is the smallest self-powered synchronous modem eliminator on the market. All
power is derived from the RS-232 data signals, so no AC power or batteries are required. Constructed with a DB-25 connector on each end,
the Model 1200 can extend synchronous cable runs to 300 feet on each
side of the device. Optimum distance is achieved at 9600 bps, and strap
selectable data rates may extend up to 38,400 bps.
The Model 1200 provides internal or external clock options and operates
half or full duplex. To emulate dial-up or dedicated service, the delay
between RTS and CTS can be set to either 0mS, 6.6mS or 53mS. The
carrier can be configured either as “constantly on” or “controlled by RTS”.
The Model 1201 has all the features of the Model 1200, plus LED indicators that monitor receive data, request to send and data carrier detect on
each side of the device.
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3.0 INSTALLATION
Do the following to install the Patton Model 1200:
1. Configure according to the instructions listed in section 4.0, “Configuration” on page 7.
2. Turn off the computer or device to which the Model 1200 is to be
connected.
3. Plug the DB-25 connectors directly into the serial ports of your RS232 devices. If you wish to extend the distance, you can add cables
on both sides (see Figure 1).
Note Cables must not be longer than 300 feet (see Figure 1).
Sync. Host
Cable
(300 feet or less)
Sync. Host
Model
1200
Cable
(300 feet or less)
Figure 1. Configuration
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4.0 CONFIGURATION
The Model 1200 is equipped with four strapping options that allow configuration to a wide range of applications. To gain access to the internal
straps, loosen the hex nuts on the DB-25 connectors and pry open the
case between the plastic shell ears. Figure 2 shows the location of each
strapping option.
Constant
Controlled
0 mSec
6.6 mSec
53 mSec
Ground
Data Rate
Port 2 Frame
Ground connects
to signal ground
External Clock
38.4 kbps
19.2 kbps
9.6 kbps
4.8 kbps
2.4 kbps
1.2 kbps
Carrier Detect
Por t 1
RTS/CTS Delay
Por t 1
Port 1 Frame
Ground connects
to signal ground
Por t 2
Por t 2
Figure 2. Strap settings for the Model 1200/1201
4.1 DATA RATE
The data rate strap controls the rate at which data is transmitted. Adjust
the strap to select one of the following options: 1.2, 2.4, 4.8, 9.6, 19.2,
38.4 or external clocking. If “external clocking” is selected, the Model
1200 will automatically match the clocking between your two synchronous devices. The default setting is 9.6 Kbps.
4.2 CARRIER DETECT
The carrier detect straps allow you to determine whether the carrier is
“constantly on” or “controlled by RTS”. By adjusting the strap, you may
operate in switched carrier, multi-point and/or hardware handshaking
applications. Port 1 and port 2 may be configured separately. The
defaults setting is “on” for both ports.
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4.3 RTS/CTS DELAY
The RTS/CTS delay straps determine the amount of delay between the
time the Model 1200 “sees” RTS and when it sends CTS. In order to
emulate either dial-up or leased line modems, you can set this strap at
either no delay, 6.6mS or 53mS. Port 1 and port 2 may be configured
separately. The default setting is 6.6mS for both ports.
4.4 GROUND
The ground strap setting connects the protective ground from port 1 or 2
to the Model 1200’s signal ground. The default setting is port 1.
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5.0 OPERATION
Once you have configured the Model 1200 properly (see section 4.0,
“Configuration” on page 7) and plugged it into your equipment, you are
ready to operate the unit. After the Model 1200 is properly installed, it
should operate transparently—as if it were a standard cable connection.
Operating power is derived from the RS-232 data and control signals;
there is no “ON/OFF” switch.
5.1 LED STATUS INDICATORS (MODEL 1201 ONLY)
The Model 1201 features six front panel status LEDs that indicate the
condition of the modem eliminator and the communication link. The diagram below shows the location of each of these LEDs. Following the diagram is a description of each LED’s function.
•“TD” and “RTS” indicators blink with data activity.
•“CD” lights for an incoming signal on the line side and the resulting out-
put signal on the RS-232.
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APPENDIX A
SPECIFICATIONS
A.1 DATA RATES
Selectable: 1200, 2400, 4800, 9600, 19200, 38400
A.2 CLOCKING
Internal or external
A.3 GROUNDING
Protective ground (pin 1) may be strapped to signal ground (pin 7)
A.4 RANGE
300 feet on either side (for a total of 600 feet) at 9600 bps, range extends
linearly for lower bit rates and decreases for higher bit rates
A.5 FUNCTIONAL
Emulates half or full duplex, dial-up or dedicated line
A.6 RTS/CTS DELAY
Selectable per port: 0mS, 6.6mS, 53mS
A.7 DCD
Selectable per port: continuous or RTS controlled
A.8 RING INDICATOR
Constantly on
A.9 INTERFACE
EIA RS-232C/CCITT V.24
A.10 CONNECTORS
Choice of two male or two female DB-25 RS-232 connectors
A.11 POWER SUPPLY
None required
A.12 ALTITUDE
0 to 10,000 feet
A.13 HUMIDITY
Up to 95% non-condensing
A.14 DIMENSIONS
Approximately 5.3 x 2 x 1.2 in.
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APPENDIX B
BLOCK DIAGRAM
Copyright © 2001
Patton Electronics Company
All Rights Reserved.
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Dear Valued Customer,
Thank you for purchasing Patton Electronics products! We do appreciate your business. I trust that you find this user manual helpful.
We manufacture one of the widest selections of data communications
products in the world including CSU/DSU's, network termination units,
powered and self-powered short range modems, fiber optic modems,
interface converters, baluns, electronic data switches, data-line surge
protectors, multiplexers, transceivers, hubs, print servers and much
more. We produce these products at our Gaithersburg, MD, USA, facility,
and can custom manufacture products for your unique needs.
We would like to hear from you. Please contact us in any of the following
ways to tell us how you like this product and how we can meet your product needs today and in the future.
Web: http://www.patton.com
Sales E-mail: sales@patton.com
Support E-mail: support@patton.com
Phone - Sales (301) 975-1000
Phone - Support (301) 975-1007
Fax: (301) 869-9293
Mail: Patton Electronics Company
7622 Rickenbacker Drive
Gaithersburg, MD 20879 USA
We are committed to a quality product at a quality price. Patton Electronics is ISO 9001 certified. We meet and exceed the highest standards in
the industry (CE, UL, etc.).
It is our business to serve you. If you are not satisfied with any aspect of
this product or service provided by Patton Electronics or its distributors,
please let us know.
Thank you.
Burton A.Patton
Vice President
P.S. Please tell us where you purchased this product.
________________________________________________________
________________________________________________________
________________________________________________________
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