USER
MANUAL
MODEL 1050
AC Powered, Asynchronous
Short Range Modem
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
Part #07M1050-B
Doc. #058031B
Revised 7/30/97
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An ISO-9001
Certified Company
2.0 GENERAL INFORMATION
3.0 CONFIGURATION
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 do not hesitate to
contact Patton Electronics Technical Support at (301) 975-1007.
The Model 1050 may be configured for a wide variety of
asynchronous RS-232 applications. This section will tell you how to
access and set the internal DCE/DTE switch and the internal carrier
control strap. WAIT. Before attempting to re-configure the Model 1050,
check the Default Configuration Table (below) to see if the factory
settings are correct for your application.
2.1 FEATURES
DEFAULT 1050 CONFIGURATION TABLE
Switch (Strap)
Factory Setting
Result
• Asynchronous RS-232 Operation
• Data Rates to 38,400 bps
DTE/DCE Switch
DCE
Model 1050 is set to connect to
DTE device (PC, Terminal, etc.)
• Distances up to 7 miles (ll.2 km)
• Point-to-Point or Multipoint Operation
• Optical Isolation
Carrier Control Strap
Pegs 1 & 2
Carrier is “Controlled by RTS”
• Loopback Tests
• Tri-State LED Indicators
3.1 ACCESSING THE MODEL 1050 PC BOARD (see Note 1)
• DCE/DTE switch selectable
• Carrier Selectable for “Constantly On” or “Controlled by RTS”
• Both RJ-11 and Terminal Block Line Connectors
• Ultra-Compact Enclosure
To access the internal PC board, simply remove the two screws at
the rear of the unit and slide the PC board and rear panel out of the
case. Figure 1 (below) shows the location of the DCE/DTE switch and
the RTS strap on the PC board.
• Externally Powered
Carrier Control Strap
2.2 DESCRIPTION
The Patton Model 1050 AC Powered Asynchronous Short Range
Modem is to our AC powered short haul line what the Model 1000 is to
our interface powered line–a basic short haul at a great price! And the
Model 1050 has the key features you need: optical isolation, a local
loopback test mode, LED indicators and a DCE/DTE switch. The
Model 1050 supports asynchronous RS-232 data rates to 38.4 Kbps.
Distances of 7 miles (11.2 km) (@ 1200 bps) are attainable over two
24 AWG (.5mm) twisted pair.
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DCE/DTE Switch
DTE
DCE
Housed in an ultra-compact metal enclosure, the Model 1050 offers a
choice of line connections: both external RJ-11 jack and internal
terminal block are provided. On the RS-232 side, a female DB-25 is
standard. The Model 1050 is designed for point-to-point or multipoint
applications, and is also compatible with the Patton 1060 and 1226
short hauls.
Figure 1. Switch/Strap locations on Model 1050 PC board.
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4.0 INSTALLATION
3.2 SETTING THE DCE/DTE SWITCH
The Model 1050 is easy to install. After configuring the unit
properly, you will need to connect the two twisted pairs and the RS-232
cable. Figure 2 (below) shows the rear panel location of the RJ-11 jack
and strain relief grommet (line connections), as well as the female DB-
25 (RS-232 connection).
Correct setting of the DCE/DTE switch eliminates the need for RS-
232 crossover cables. If the RS-232 device you are connecting to the
Model 1050 is a PC, terminal or host, or is wired like one, set the
DCE/DTE switch to "DCE". If the RS-232 device you are connecting to
the Model 1050 is a modem or multiplexer, or is wired like one, set the
DCE/DTE switch to "DTE".
Made In The USA
Powered Async. Short
Range Modem
3.3 SETTING THE CARRIER CONTROL STRAP (see Note 2)
The setting of the carrier control strap determines whether carrier
is “constantly on” or “controlled by RTS”. For “controlled by RTS”
position the strap on pegs 1 & 2. For “constantly on” position the strap
on pegs 2 & 3. Figure 2 (below) shows the two possible settings of the
carrier control strap.
Power
RS-232 Interface
Line
Figure 3. Rear view of 1050 showing interface connectors
4.1 TWISTED PAIR WIRING OVERVIEW
These short range modems are designed to work in pairs. You will
need one at each end of a 4-wire twisted pair circuit. The pairs must be
"dry" (unconditioned) metallic wire, 19 - 26 AWG. The smaller gauges
limit distance somewhat compared with larger gauges. When you have
completed wiring for your data circuit, the pin connections should be as
shown below:
1
2
3
1
2
3
1
2
3
Figure 2 Model 1050 strap settings
XMT +
XMT -
G
RCV -
RCV +
RCV+
RCV -
G
XMT -
XMT +
One Pair
One Pair
}
}
NOTE 1: If you are connecting twisted pair to the Model 1050
using the internal terminal blocks, make the twisted pair
connection before re-inserting the PC board into the case. See
Section 4.1.1 for details on twisted pair connection.
To Shield (Optional)
NOTE 2: If you are using the Model 1050 in a multipoint
application, consult Section 4.2 for proper Master and Slave carrier
control settings.
4.1.1 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS
The Model 1050 terminal block is located on the PC board inside
the unit. To access the PC board, remove the two screws on the back
panel and slide the PC board out of the case. Connect the bare twisted
pair wires by first inserting them through the grommet on the back
panel, then stripping the ends and connecting the individual leads to
the terminal block. Be sure the end-to-end connections follow the
diagram above.
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4.1.2 TWISTED PAIR CONNECTION USING RJ-11
4.2 WIRING FOR MULTIPOINT CIRCUITS
If your two-pair cable is terminated in an RJ-11 plug, you may use
the RJ-11 jack in the back of the Model 1050 to make the connection.
The RJ-11 jack on a Model 1050 series Short Range Modem is
prewired for a standard TELCO wiring environment. To be sure you
have the right wiring, use the diagram below as a guide.
The Model 1050 supports multi-point applications using either a
star or daisy chain topology. Both topologies require special wiring, as
well as specific carrier control strap settings for master and slave units.
4.2.1 DAISY CHAIN TOPOLOGY
RJ-11
SIGNAL
1 ---------------------GND†
2 ---------------------RCV-
3 ---------------------XMT+
4 ---------------------XMT-
5 ---------------------RCV+
6 ---------------------GND†
Using a daisy chain topology, you may connect as many as 10
Model 1050s together in a master/slave arrangement. Maximum
distance between the units will vary based upon the number of drops,
data rate, wire gauge, etc. Call Patton Technical Support for specific
distance estimates.
Figure 3 (below) shows how to wire the two-pair cables properly for
a Model 1050 daisy chain topology. Note that the ground connection is
not needed.
For proper signal crossing between two Model 1050s using RJ-11
connectors, pin-out the twisted pair cable according to the diagram
below.
HOST
FIRST SLAVE
OTHER SLAVE(S)
XMT+
XMT-
RCV+
RCV-
RCV+
RCV-
XMT+
XMT-
RCV+
RCV-
XMT+
XMT-
RJ-11 Cable (4-Wire)
SIGNAL
PIN#
PIN#
SIGNAL
GND†
RCV-
XMT+
XMT-
RCV+
GND†
1-----------------------6
2-----------------------4
3-----------------------5
4-----------------------2
5-----------------------3
6-----------------------1
GND†
XMT-
RCV+
RCV-
XMT+
GND†
Figure 3. Model 1060 daisy chain wiring
In a multipoint topology, you must configure the master Model
1050's carrier control strap differently than those of the slave Model
1050(s). Here are the proper carrier control strap settings for a daisy
chain topology:
†Connection to ground is optional
Function
Carrier Control Strap Setting
1
2
3
4
5
6
Master
Carrier “Constantly ON” (pegs 2 & 3)
Slave(s)
Carrier “Controlled by RTS” (pegs 1 & 2)
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5.0 OPERATION
4.2.2 STAR TOPOLOGY
Once you have configured each Model 1050 properly and
connected it, simply plug in the AC power adapter to get it running;
there is no power switch on the Model 1050. You can monitor the
operation of the Model 1050 using the front panel LED indicators and
built-in loopback test modes.
Using a star topology, you may connect several Model 1050s
together in a master/slave arrangement. Maximum distance between
the units will vary based upon the number of drops, data rate, wire
gauge, etc. Call Patton Technical Support for specific distance
estimates.
Figure 4 (below) shows how to wire the two-pair cables properly for
a Model 1050 star topology. Note that the ground connection is not
needed.
5.1 LED INDICATORS
The Model 1050 incorporates three front panel LEDs that show the
status of the modem:
HOST
FIRST SLAVE
SECOND SLAVE
RCV+
1. The loopback test LED glows when the loopback test switch
has been depressed and is in a test mode.
XMT+
RCV+
2. The tri-state TD and RD indicators blink red and green with data
activity. Solid red indicates a low RS-232 logic level. Note: RS-232
devices idle in a low state, so the LED will glow red if the connections
are correct and the RS-232 device is in an idle state.
XMT-
RCV+
RCV-
RCV-
XMT+
XMT-
RCV-
XMT+
5.2 LOOPBACK TEST MODES
Select the test modes by depressing the "Loopback Test" switch.
When in loopback mode, the "Loopback Test" LED will glow red. Two
tests are possible using this switch: Local Analog Loop (LAL), and
Remote Analog Loop (RAL).
XMT-
Figure 4. Model 1060 star wiring
In a multipoint topology, you must configure the master Model
1050's carrier control strap differently than those of the slave Model
1050(s). Here are the proper carrier control strap settings for a star
topology:
5.2.1 LOCAL ANALOG LOOP
The first test mode is Local Analog Loop (V.54 Loop 3). Any data
sent to the local Model 1050 in this mode will be echoed (returned)
back to the user device. For example, characters typed on the
keyboard of a terminal will appear on the terminal screen (see Figure 3
on the following page).
Function
Carrier Control Strap Setting
Master
Carrier “Constantly ON” (pegs 2 & 3)
Slave(s)
Carrier “Controlled by RTS” (pegs 1 & 2)
4.3 RS-232 CONNECTION
To connect the Model 1050 to a piece of data terminal or data
communications hardware, use a straight through RS-232 cable. Plug
the cable directly into the DB-25 port on the rear of the Model 1050.
The DCE/DTE switches eliminate the need for a crossover cable.
(continued)
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APPENDIX A
5.2.2 REMOTE ANALOG LOOP
PATTON MODEL 1050 SPECIFICATIONS
The second test mode is Remote Analog Loop. To enter this
mode, set one of the Model 1050s (local) in test mode by depressing
the "Loopback Test" switch. Any characters sent from the remote 1050
will be returned to it (see Figure 5). If no characters are echoed back,
check the wiring between the two Model 1050s. Be sure to wire the
units according to the instructions in Section 4.0 Installation.
Transmission Format: Asynchronous
Transmission Line:
Range:
19 to 26 AWG twisted pair
7 miles on 24 AWG twisted pair @ 1200 bps
EIA RS-232 (CCITT V.24), DB-25 female
TX+
TX-
RX+
RX-
Serial Interface:
RD
TD
TD
RD
Twisted Pair Interface: Terminal blocks, RJ-11 jack
RX-
TX-
Data Rates:
Applications:
Indicators:
0 - 38,400 bps
RX+
TX+
Point-to-point, Multipoint
Remote 1060
In Normal Mode
Local 1060
In Normal Mode
Tri-state for transmit data, receive data, and
test
TX+
TX-
RX+
RX-
RD
TD
TD
RD
Diagnostics:
Local Analog Loopback (LAL), Remote
Analog Loopback (RAL)
RX-
TX-
RX+
TX+
Optical Isolation:
2500V RMS (minimum)
Local 1060
In Loopback Mode
Remote 1060
In Normal Mode
Power Supply:
Wall mount, 9-12VAC, 200ma
Temperature Range: 0-60°C (32-140°F)
Figure 5. Loopback Test Modes
Altitude:
0-15,000 feet
Humidity:
Dimensions:
Weight:
5 to 95% noncondensing
1.58”H x 4.16”W x 3.75”D
13.2 oz. (without transformer)
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APPENDIX B
APPENDIX C
PATTON MODEL 1050 CABLE RECOMMENDATIONS
PATTON MODEL 1050 INTERFACE PIN ASSIGNMENT
All Patton Electronics Company Short Range Modems are tested to
the distances published in our Catalogs and Specification Sheets on
twisted-pair cable with the following characteristics:
RS-232 FEMALE, D-SUB 25 CONNECTOR
(DCE ORIENTATION)
Wire Gauge
Capacitance
Resistance
DIRECTION
STANDARD RS-232C/V.24 “DCE” SETTING
DIRECTION
19 AWG(.9mm) 83nF/mi or 15.72 pF/ft.
22 AWG(.6mm) 83nF/mi or 15.72 pF/ft.
24 AWG(.5mm) 83nF/mi or 15.72 pF/ft.
26 AWG(.4mm) 83nF/mi or 15.72 pF/ft.
.0163Ω/ft.
.0326Ω/ft.
.05165Ω/ft.
.08235Ω/ft.
1- (FG) Frame Ground
2- (TD) Transmit Data
3- (RD) Receive Data
To 1050
From 1050
To 1050
4- (RTS) Request to Send
5- (CTS) Clear to Send
6- (DSR) Data Set Ready
7- (SG) Signal Ground
8- (DCD) Data Carrier Detect
From 1050
From 1050
We fully expect that the Short Range Modems will operate on lines
with specifications different from those tested, but to reduce the
potential difficulties in the field, one should ensure that the cable being
used has similar or better characteristics (lower capacitance or lower
resistance).
From 1050
Wire with capacitance of 20pF/ft. or less is suitable for all our Short
Range Modems however, distances may vary from those published in
our catalog. Resistance will also affect distance but not functionality.
Wire should be 26 AWG (.4mm) (or larger (smaller AWG#).
Patton products are designed to withstand normal environmental
noise and conditions however, other environmental factors too
numerous to discuss in this format may affect proper operation of the
SRM’s.
DIRECTION
STANDARD RS-232C/V.24 “DTE” SETTING
DIRECTION
1- (FG) Frame Ground
2- (TD) Transmit Data
3- (RD) Receive Data
4- (RTS) Request to Send
From 1050
To 1050
Selection of the proper SRM for an application is critical to
maintaining Customer Satisfaction and should be taken seriously.
Certain models are better suited for particular applications and
environments than others.
From 1050
7- (SG) Signal Ground
Data Term. Ready (DTR) - 20
From 1050
8- (DCD) Data Carrier Detect
To 1050
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APPENDIX D
Dear Valued Customer,
Thank you for purchasing Patton Electronics products! We do
PATTON MODEL 1050 BLOCK DIAGRAM
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:
(301) 975-1000
(301) 975-1007
(301) 869-9293
Sales E-mail:
Support E-mail:
Phone - Sales
Phone - Support
Fax:
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 BABT and 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 the service provided from 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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Copyright © 1997
Patton Electronics Company
All Rights Reserved
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