USER
MANUAL
MODEL 1002
and 1002S
Asynchronous
2- Wire / Coax
Short Range Modem
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
Part #07M1002-C
Doc. #050011UC
Revised 4/28/98
An ISO-9001
Certified Company
2.0 GENERAL INFORMATION
3.0 INSTALLATION
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 Patton Model 1002 is easy to install and should give you
years of trouble-free service. You must have a PAIR of units to perform
an installation—one at each end of an unconditioned twisted pair or
coax cable. The following instructions explain this procedure.
2.1 FEATURES
3.1 SETTING THE DTE/ DCE SWITCH
• Full duplex operation on coax or a single twisted pair
• Data rates to 19,200 bps
• Range to 2 miles (3.2 km)
• No AC power or batteries required
• Twisted pair connection via strain relief, RJ-11 or RJ-45
• Surge protected (Model 1000S only)
• Coax connection via female BNC (optional)
• External DCE/DTE switch
For your convenience, the Model 1002 has an externally
accessible DCE/DTE switch (see diagram below). If the device
connected to the Model 1002 is a modem or multiplexer (or is wired like
one), set the DCE/DTE switch to “DTE”. This means the Model 1002
will behave like Data Terminal Equipment and transmit data on pin 2.
If the device connected to the Model 1002 is a PC, terminal or host
computer (or is wired like one), set the DCE/DTE switch to "DCE". This
setting means the Model 1002 will behave like Data Communications
Equipment and transmit data on pin 3.
• Made in the USA
2.2 DESCRIPTION
DTE
DCE
The Model 1002 Asynchronous Short Range Modem extends
RS-232 distances to 2 miles (3.2 km) over coax or a single
unconditioned twisted pair. The small size of this unit enables use
where serial ports are very close together or are not easily accessible.
The Model 1002 incorporates innovative circuitry that lets it operate
without connection to AC power or batteries. The necessary power for
operation is derived from the RS-232 input signals.
3.2 CONNECTING THE LINE SIDE
Depending upon the type of unit, the Model 1002 connects to the
line side via single twisted pair (terminal block, RJ-11, RJ-45) or coax
(BNC). Follow the appropriate instruction set for the type of unit you
have.
An external DCE/DTE switch allows easy connection of the Model
1002 to any device without opening the unit to re-configure. Three
enclosure options allow termination of a single twisted pair via RJ-11,
RJ-45 or terminal blocks. A unique strain relief prevents the twisted
pair from breaking or pulling loose. An additional enclosure option
allows termination of coax cable via female BNC.
3.2.1 Connection Using the Terminal Block
The Model 1002S is a surge protected version of the Model 1002
that uses the latest in bi-directional, clamping, transient suppressors to
protect itself and connected equipment against harmful transient
discharges. For surge handling capability, the Model 1002S is
compliant with IEC 801.5 level 2, 1kV.
Terminal blocks are used to connect a single pair of bare wires to
the Model 1002. The following instructions will tell you how to open the
case, connect the bare wires and fasten the strain relief collar in place.
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1. Open the unit by gently inserting a screwdriver between the
DB-25 connector and the lip of the plastic case (see below).
You don't have to worry about breaking the plastic, but be
careful not to bend the D-sub connector.
2. Strip the outer insulation from the twisted pairs about one inch
from the end.
3. Strip back the insulation on each of the 2 wires about .25”.
4. Insert the two wire data line to the center (signal) and shield
(ground) terminal posts, then tighten the screws. Depending
on version, terminal post locations may vary.
Having opened the unit's case, you will find the terminal block
mounted at the rear of the PC board (see below). The
terminals are labled “S” for “signal” and “G” for “ground“.
DCE/DTE
Switch
Terminal
Block
Surge
Suppressors
(1002S only)
NOTE: Be sure that all cabling between the short range
modems is straight through:
SIGNAL (S)
(S) SIGNAL
GROUND (G)
(G) GROUND
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4. Place the 2 halves of the strain relief assembly on either side
of the telephone wire and press together very lightly. Slide the
assembly until it is 2 inches from the terminal posts and press
together firmly.
7. Insert one captive screw through a saddle washer and then
insert the entire piece through the hole in the DB-25 end of the
case. Snap that side of the case closed. Repeat on other
side. This completes installation.
3.2.2 Connection Using RJ-11 and RJ-45 Jacks
When using the RJ-11 or RJ-45 modular jacks it is necessary to use
“straight through” cabling between the modems as shown below:
RJ- 11 JACKS
†
SIGNAL PIN# COLOR
COLOR
PIN# SIGNAL
DATA
GND
3
4
Green
Red
Green
Red
3
4
DATA
GND
5. Insert the strain relief assembly and connected wire into the
slot in the bottom half of the modem case; set it into the recess
in the case. (If the telephone wire does not fit into the strain
relief assembly, call Patton’s sales department to obtain a new
assembly).
RJ- 45 JACKS
†
SIGNAL PIN# COLOR
COLOR
PIN# SIGNAL
DATA
GND
4
5
Red
Green
Red
Green
4
5
DATA
GND
†
Standard color codes—yours may be different
1 - Blue
2 - Orange
3 - Black
4 - Red
1 - Blue
2 - Yellow
3 - Green
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate
6. BEND the top half of the case to place it over the strain relief
assembly. Do not snap the case together yet.
5 - Black
6 - White
AT &T standard color codes:
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APPENDIX A
3.2.3 Connection Using Coax (BNC)
PATTON MODEL 1002 SPECIFICATIONS
If you have the coax version of the Model 1002, simply connect the
BNC mating connectors to both modems.
Transmission Format: Asynchronous
Transmit Line:
2 wire unconditioned twisted pair
or coaxial cable
Transmit Mode:
Transmit Level:
Control Signals:
Full or half duplex
0 dBm
DSR and DCD turn “ON” immediately after
the terminal raises DTR; CTS turns “ON”
immediately after the terminal raises RTS
Surge Protection:
Compliant with IEC 801.5 level 2, 1kV
(Model 1002S Only)
Data Rate:
Range:
0 to 19.2 Kbps
2.0 miles @ 0 to 9600 bps
5.0 miles @ 19,200 bps
Power:
No external power required, derives
required power from RS-232 input signals
Size:
2.20” x 1.75” x 0.75” (5.6 x 4.4 x 1.9 cm)
32° to 140°F
Temperature:
Humidity:
95% non-condensing
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APPENDIX B
APPENDIX C
PATTON MODEL 1002 CABLE RECOMMENDATIONS
PATTON MODEL 1002 INTERFACE CONNECTIONS
The Patton Model 1002 operates at frequencies of 20kHz or less and
has been performance tested by Patton technicians using twisted-pair
cable with the following characteristics:
DIRECTION
STANDARD “DCE” SETTING
DIRECTION
1- (FG) Frame Ground
2- (TD) Transmit Data
Wire Gauge
Capacitance
Resistance
To Model 1002
3- (RD) Receive Data
4- (RTS) Request to Send
5- (CTS) Clear to Send
6- (DSR) Data Set Ready
7- (SG) Signal Ground
From Model 1002
To Model 1002
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.
.0163 Ohms/ft.
.0326 Ohms/ft.
.05165 Ohms/ft.
From Model 1002
From Model 1002
To Model 1002
Data Term. Ready (DTR) - 20
8- (DCD) Data Carrier Detect From Model 1002
To gain optimum performance from the Model 1002, please keep the
following guidelines in mind:
• Always use twisted par wire—this is not an option.
• Use twisted pair wire with a capacitance of 20pf/ft or less.
DIRECTION
STANDARD “DTE” SETTING
DIRECTION
• Avoid twisted pair wire thinner than 26 AWG (i.e. avoid higher
AWG numbers than 26)
1- (FG) Frame Ground
2- (TD) Transmit Data
3- (RD) Receive Data
From Model 1002
To Model 1002
From Model 1002
To Model 1002
To Model 1002
• Use of twisted pair with a resistance greater than the above
specifications may cause a reduction in maximum distance
obtainable. Functionality should not be affected.
4- (RTS) Request to Send
5- (CTS) Clear to Send
6- (DSR) Data Set Ready
7- (SG) Signal Ground
8- (DCD) Data Carrier Detect
• Environmental factors too numerous to mention can affect the
maximum distances obtainable at a particular site. Use “maximum
distance” figures as a general guidelin only.
From Model 1002 Data Term. Ready (DTR) - 20
To Model 1002
Model 1002 Distance Table in Miles (km)
Wire Gauge
24 AWG 26 AWG
(0.5 mm) (0.4 mm)
Data Rate
(bps)
19 AWG
( 0.9 mm)
19,200
9,600
4,800
2,400
1,200
2.2(3.5)
3.0(4.8)
4.3(6.4)
5.3(8.5)
5.6(9.0)
1.6(2.6) 1.2(1.9)
2.1(3.4) 1.6(2.6)
2.6(4.2) 1.7(2.7)
2.8(4.5) 1.8(2.9)
2.8(4.5) 1.8(2.9)
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APPENDIX D
PATTON MODEL 1002 BLOCK DIAGRAM
Copyright © 1998
Patton Electronics Company
All Rights Reserved
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