Patton electronic Network Card 1020 User Manual

USER  
MANUAL  
MODEL 1020  
and 1020S  
Synchronous Short  
Range Modem with  
Transformer Isolation  
Part #07M1020-C  
Doc. #041011UC  
Revised 4/20/98  
SALES OFFICE  
(301) 975-1000  
TECHNICAL SUPPORT  
(301) 975-1007  
C
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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 1020 provides four configuration switches which allow  
selection of RTS/CTS delay and data rates. This section describes  
switch locations and explains all possible switch configurations.  
3.1 SWITCH LOCATIONS  
2.1 FEATURES  
For your convenience, all configuration switches are located on a  
SIP (single in-line package) mounted on the PC board. Figure 1 shows  
the location of the SIP with respect to other PC board components. For  
instructions on opening the Model 1020 case, see Section 4.1.2.  
• Supports point-to-point data rates from 1.2 to 19.2 Kbps  
• Internal, crystal controlled clock  
• Transformer isolation guards against ground looping  
• Range to 11 miles  
Patton  
VLSI chip  
Terminal Block  
• Full duplex operation  
X X X X  
P E 0 6 8  
N O T P A T  
• Custom VLSI chip with separate filter for each data rate  
• No AC power or batteries required  
• Miniature size  
Isolating  
Transformers  
Control  
• High speed surge protection (Model 1020S only)  
Switches  
2.2 DESCRIPTION  
The Patton Electronics Model 1020 miniature, synchronous short  
range modem uses the latest in VLSI technology to combine high-  
quality data transmission with compact size. The Model 1020 does not  
require any AC power or batteries to operate, and communicates up to  
11 miles in point-to-point environments.  
Figure 1. Model 1020 PC board showing switches  
Figure 2 shows the orientation of the configuration switches,  
including the ON/OFF position.  
Supporting full duplex transmission over two twisted pairs, the  
Model 1020 has a crystal controlled internal clock. Data rates are  
switch selectable from 1200 to 19,200 bps. The Model 1020’s custom  
VLSI chip uses a separate filter for each data rate, rather than a single  
“compromise” filter. Transformer isolation allows the Model 1020 to  
operate between buildings without data disruption due to ground  
potential differences.  
OFF  
1
2
3
4
ON  
Figure 2. Close-up of configuration switches  
The Model 1020S is a surge protected version of the Model 1020,  
incorporating Silicon Avalanche Diodes that provide 600 watts of  
protection per wire.  
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4
 
4.0 INSTALLATION  
3.2 SWITCH SETTINGS  
Once the Model 1020 is properly configured, it is ready to connect  
to your system. This section tells you how to properly connect the  
Model 1020 to the twisted pair and RS-232 interfaces, and how to  
operate the Model 1020.  
All possible settings for the Model 1020’s configuration switches  
are presented in the summary table and descriptions below. If you  
have additional questions regarding configuration, contact Patton  
Technical Support at (301) 975-1007.  
4.1 CONNECTION TO THE TWISTED PAIR INTERFACE  
SWITCH SUMMARY TABLE  
Position  
Switch 1  
Switch 2  
Switch 3  
Switch 4  
Function  
RTS/CTS delay  
Data Rate  
Factory Default  
The Model 1020 supports data-only communication between two  
RS-232 devices at distances to 11 miles and data rates to 19.2 Kbps.  
There are two essential requirements for installing the Model 1020:  
On  
On  
Off  
Off  
7 mSec delay  
Data Rate  
9,600 bps  
1. These units work in pairs. Therefore, you must have one Model  
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1020 at each end of a two twisted pair interface.  
Data Rate  
2. To function properly, the Model 1020 needs two twisted pairs of  
metallic wire. These pairs must be unconditioned, dry, metallic  
wire, between 19 and 26 AWG (the higher number gauges may  
limit distance somewhat). Standard dial-up telephone circuits, or  
leased circuits that run through signal equalization equipment, are  
not acceptable.  
Switch 1: RTS/CTS Delay  
After request to send (RTS) is raised by the host terminal, the  
1020/1020S raises CTS after a slight delay in order to give the remote  
terminal time to receive an incoming signal. Depending on the type of  
environment, either a 7mS or 53mS delay can be selected.  
For your convenience, the Model 1020 is available with three  
different twisted pair interfaces: RJ-11 jack, RJ-45 jack and terminal  
blocks with strain relief.  
Switch 1  
On  
Setting  
7 mS  
Off  
53 mS  
4.1.1 TWISTED PAIR CONNECTION USING RJ-11 OR RJ-45  
Switches 2, 3 and 4: Data Rate  
The RJ-11 and RJ-45 connectors on the Model 1020’s twisted pair  
interface are pre-wired for a standard TELCO wiring environment. The  
signal/pin relationships are shown below:  
Switches 2 thru 4 are set in combination to allow the Model 1020 to  
be used at data rates from 1.2 Kbps up to 19.2 Kbps.  
Switch 2  
On  
On  
On  
Off  
On  
Off  
Off  
Off  
Switch 3  
On  
On  
Off  
On  
Off  
On  
Off  
Off  
Switch 4  
On  
Off  
On  
On  
Off  
Off  
On  
Off  
Setting  
1.2 Kbps  
2.4 Kbps  
4.8 Kbps  
7.2 Kbps  
9.6 Kbps  
14.4 Kbps  
19.2 Kbps  
19.2 Kbps  
RJ-11  
SIGNAL  
RJ-45  
SIGNAL  
1...................GND†  
2...................RCV‡  
3...................XMT  
4...................XMT  
5...................RCV  
6...................GND  
1 .................N/C  
2 .................GND†  
3 .................RCV‡  
4 .................XMT  
5 .................XMT  
6 .................RCV  
7 .................GND  
8 .................N/C  
Connection to ground is optional  
The Model 1020 is not polarity sensitive  
5
6
 
1. Open the unit by gently inserting a screw driver 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.  
When connecting two Model 1020s it is necessary to use a  
“crossover” cable. The diagram below shows how a crossover cable  
should be constructed for an environment where both Model 1020s use  
a 6-wire RJ-11 connector. Similar logic should be followed when using  
RJ-45 connectors or a combination of the two.  
SIGNAL PIN#  
COLOR  
COLOR PIN#  
SIGNAL  
GND†  
RCV‡  
XMT  
XMT  
RCV  
GND  
1
2
3
4
5
6
Blue.................White  
Yellow ..............Red  
Green...............Black  
Red..................Yellow  
Black................Green  
White ...............Blue  
6
4
5
2
3
1
GND  
XMT  
RCV  
RCV  
XMT  
GND  
Connection to ground is optional  
Standard color codes—yours may be different  
The Model 1020 is not sensitive to polarity  
1 - Blue  
2 - Orange  
3 - Black  
4 - Red  
1 - Blue  
2 - Yellow  
3 - Green  
4 - Red  
5 - Green  
6 - Yellow  
7 - Brown  
8 - Slate  
5 - Black  
6 - White  
Once the unit has been opened, you will be able to see the  
terminal blocks located at the rear of the PC board.  
Standard AT&T color codes  
4.1.2 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS  
2. Strip the outer insulation from the twisted pairs about one inch  
from the end.  
If your application requires you to connect two pairs of bare wires  
to the Model 1020, you will need to open the case to access the  
terminal blocks. The instructions on the following pages will tell you  
how to open the case, connect the bare wires to the terminal blocks,  
and fasten the strain relief collar in place so that the wires won’t pull  
loose.  
3. Strip back the insulation on each of the 2 twisted pair wires  
about .25”.  
7
8
 
4. Connect one pair of wires to the two XMT (transmit) poles on  
the terminal block, making careful note of which colors you  
use. The Model 1020 is not polarity sensitive, so either wire  
may connect to either pole.  
8. Place the 2 halves of the strain relief assembly on either side  
of the telephone wire and press together very lightly. Slide the  
assembly so that it is about 2 inches from the terminal posts  
and press together firmly. If your cable diameter is too small  
or too large for our strain relief, please contact our technical  
support. We have strain relief assemblies to accommodate  
most cable diameters.  
5. Connect the other pair of wires to the two RCV (receive) poles  
on the terminal block, making careful note of which colors you  
use. The Model 1020 is not polarity sensitive, so either wire  
may connect to either pole.  
Ultimately, you will want to construct a two pair crossover  
cable that makes a connection with the two Model 1020s as  
shown below:  
XMT  
XMT  
G
RCV  
RCV  
RCV  
RCV  
G
XMT  
XMT  
One Pair  
One Pair  
}
}
To Shield (Optional)  
6. If there is a shield around the telephone cable, it may be  
connected to “G” on the terminal block. To avoid ground  
loops, we recommend connecting the shield at the computer  
end only. A ground wire is not necessary for proper operation  
of the Model 1020.  
9. Insert the strain relief assembly with the wire going through it  
into the slot in the bottom half of the modem case and set it  
into the recess in the case.  
7. When you finish connecting the wires to the terminal block, the  
assembly should resemble the diagram below:  
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APPENDIX A  
SPECIFICATIONS  
10. BEND the top half of the case as necessary to place it over the  
strain relief assembly. Do not snap the case together yet.  
Transmission Format: Synchronous, full duplex  
Transmission Line: Two unconditioned twisted pair 19 - 26 AWG  
Range: (See table below)  
Interfaces: EIA RS-232, CCITT V.24  
Data Rates: 1200 - 19.2 Kbps  
Isolation: Minimum 1500 V RMS via custom transformers  
11. 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 the process  
for the other side. This completes cable installation.  
Surge Protection: 600W Surge Protection (10x1000µs waveform)  
(Model 1020S)  
Control Signals: CTS turns on 7 or 53 mS (switch selectable)  
after the terminal raises RTS; DSR and DCD are constantly on  
4.2 CONNECTION TO THE RS-232 INTERFACE  
Connectors: DB-25 male or female on RS-232 side;  
RJ-11, RJ-45 or terminal block with strain relief on line side  
Once you have connected the twisted pair wires correctly, simply  
plug the Model 1020 directly into the DB-25 port of the RS-232 device.  
After doing so, remember to insert and tighten the two captive  
connector screws.  
Power Supply: None required; uses power from EIA data and  
control signals  
Temperature Range: 0-60°C (32-140°F)  
Altitude: 0-15,000 feet  
(Note: If you must use a cable to connect the Model 1020 to the  
RS-232 device, make sure it is a straight through cable of the shortest  
possible length—we recommend 6 feet or less).  
Humidity: Up to 95% non-condensing  
Weight: 2 oz.  
4.3 OPERATING THE MODEL 1020  
Once the Model 1020 is properly configured and 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. All data signals from the RS-232 interface  
are passed straight through. All control signals from the RS-232  
interface are looped back.  
Dimensions: 2.66” x 2.10” x 0.73”  
Model 1020 Distance Table (miles)  
Wire Gauge  
Data  
Rate  
19  
7.5  
10.0  
10.0  
10.0  
11.0  
24  
3.5  
3.5  
7.0  
8.5  
8.5  
26  
2.5  
2.5  
4.0  
5.0  
6.0  
NOTE: If your system requires hardware flow control, you will  
need the Patton Model 1030 or Model 1070 Short Range Modem.  
Call Patton Customer Service at 301-975-1007 for more  
information.  
19,200  
9,600  
4,800  
2,400  
1,200  
11  
12  
 
APPENDIX B  
RS-232 PIN CONFIGURATIONS  
DIRECTION  
“DCE” STANDARD SETTING  
DIRECTION  
1- (FG) Frame Ground  
To Model 1020  
To Model 1020  
Transmitter Timing - 15  
Receiver Timing - 17  
2- (TD) Transmit Data  
3- (RD) Receive Data  
4- (RTS) Request to Send  
5- (CTS) Clear to Send  
6- (DSR) Data Set Ready  
7- (SG) Signal Ground  
To Model 1020  
From Model 1020  
To Model 1020  
From Model 1020  
From Model 1020  
To Model 1020  
Data Term. Ready (DTR) - 20  
8- (DCD) Data Carrier Detect From Model 1020  
Copyright © 1998  
Patton Electronics Company  
All Rights Reserved  
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