Patton electronic Network Card 1025 User Manual

USER  
MANUAL  
MODEL 1025  
and 1025S  
Synchronous Short  
Range Modem with  
Clocking Options  
SALES OFFICE  
(301) 975-1000  
Part #07M1025-C  
Doc. #041012UC  
Revised 4/20/98  
TECHNICAL SUPPORT  
(301) 975-1007  
C
E
R
T
I
F
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D
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 warrant-  
ed for One Year parts and labor. If any questions or problems arise  
during installation or use of this product, please do not hesitate to con-  
tact Patton Electronics Technical Support at (301) 975-1007.  
The Model 1025 provides six configuration switches which allow  
selection of clocking method, RTS/CTS delay and data rate. This sec-  
tion describes switch locations and explains all possible switch config-  
urations.  
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 compo-  
nents. For instructions on opening the Model 1025 case, see Section  
4.1.2.  
• Supports data rates to 19.2 Kbps  
• Internal, external or receive loopback clocking  
• Transformer isolation guards against ground looping  
• Range to 11 miles  
Terminal  
Block  
Isolating  
Transformers  
• Operates full duplex over two unconditioned twisted pair  
• Customized VLSI chip with separate filter for each data rate  
• No AC power or batteries required  
X X X X  
P E 0 6 8  
N O T P A T  
• Miniature size  
Control  
Switches  
Patton  
VLSI chip  
• Silicon Avalanche Diode surge protection (Model 1025S)  
2.2 DESCRIPTION  
The Patton Electronics Model 1025 miniature, synchronous  
short range modem uses the latest in VLSI technology to combine  
high-quality data transmission with compact size. The Model 1025  
does not require any AC power or batteries to operate, and communi-  
cates up to 11 miles in point-to-point environments. For maximum flex-  
ibility, the Model 1025 supports three clocking options: internal, exter-  
nal or receive loopback.  
Figure 1. Model 1025 PC board showing switches  
Figure 2 shows the orientation of the configuration switches,  
including ON/OFF position.  
OFF  
Providing full duplex transmission over two twisted pair, the Model  
1025 accommodates seven switch selectable data rates from 1200 to  
19,200 bps. The Model 1025’s custom VLSI chip uses a separate filter  
for each data rate, rather than a single “compromise” filter.  
1
2
3
4
5
6
Transformer isolation allows the Model 1025 to operate between build-  
ings without data disruption due to ground potential differences.  
ON  
Figure 2. Close-up of configuration switches  
The Model 1025S is a surge protected version of the Model 1025,  
incorporating Silicon Avalanche Diodes that provide 600 watts of pro-  
tection per wire.  
3
4
 
3.2 SWITCH SETTINGS  
Switches 4, 5 and 6: Data Rate  
All possible settings for the Model 1025’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.  
Switches 4 thru 6 are set in combination to allow the Model 1025  
to be used at data rates from 1.2 to 19.2 Kbps.  
Switch 4  
On  
Switch 5  
On  
Switch 6  
On  
Setting  
1.2 Kbps  
On  
On  
Off  
On  
Off  
Off  
Off  
On  
Off  
On  
Off  
On  
Off  
Off  
Off  
On  
On  
Off  
Off  
On  
Off  
2.4 Kbps  
4.8 Kbps  
7.2 Kbps  
9.6 Kbps (Default)  
14.4 Kbps  
19.2 Kbps  
19.2 Kbps  
SWITCH SUMMARY TABLE  
Position  
Switch 1  
Switch 2  
Switch 3  
Switch 4  
Switch 5  
Switch 6  
Function  
Transmit Clock  
Transmit Clock  
RTS/CTS delay  
Data Rate  
Factory Default  
Off  
On  
On  
On  
Off  
Off  
Internal  
Clock  
}
7 mSec delay  
9,600 bps  
Data Rate  
}
Data Rate  
Switches 1 and 2: Transmit Clock  
Switches 1 and 2 are used together to specify the clocking  
method. The Model 1025 can provide an internal clock (Pin 15),  
receive an external clock (from Pin 24), or loopback a received clock.  
Switch 1  
On  
Switch 2  
On  
Setting  
External Clock  
On  
Off  
External Clock  
Off  
Off  
On  
Off  
Internal Clock (Default)  
Receive Loopback  
Switch 3: RTS/CTS Delay  
After request to send (RTS) is raised by the host terminal, the  
Model 1025 raises CTS after a delay in order to give the remote termi-  
nal time to receive an incoming signal. Depending on the type of envi-  
ronment, either a 7mS or 53mS delay can be selected.  
Switch 3  
On  
Setting  
7 mS (Default)  
53 mS  
Off  
5
6
 
4.0 INSTALLATION  
When connecting two Model 1025s, 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 1025s  
use a 6-wire RJ-11 connector. Similar logic should be followed when  
using RJ-45 connectors or a combination of the two.  
Once the Model 1025 is properly configured, it is ready to connect  
to your system. This section tells you how to properly connect the  
Model 1025 to the twisted pair and RS-232 interfaces, and how to  
operate the Model 1025.  
SIGNAL PIN#  
COLOR  
COLOR PIN#  
SIGNAL  
4.1 CONNECTION TO THE TWISTED PAIR INTERFACE  
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  
The Model 1025 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 1025:  
1. These units work in pairs. Therefore, you must have one Model  
1025 at each end of a two twisted pair interface.  
Connection to ground is optional  
2. To function properly, the Model 1025 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.  
Standard color codes—yours may be different  
The Model 1025 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  
For your convenience, the Model 1025 is available with three dif-  
ferent twisted pair interfaces: RJ-11 jack, RJ-45 jack and terminal  
blocks with strain relief.  
5 - Black  
6 - White  
Standard AT&T color codes  
4.1.1 TWISTED PAIR CONNECTION USING RJ-11 OR RJ-45  
The RJ-11 and RJ-45 connectors on the Model 1025’s twisted pair  
interface are pre-wired for a standard TELCO wiring environment. The  
signal/pin relationships are shown below:  
4.1.2 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS  
If your application requires you to connect two pairs of bare wires  
to the Model 1025, you will need to open the case to access the termi-  
nal blocks. The instructions on the following pages will tell you how to  
open the case, connect the bare wires to the terminal blocks, and fas-  
ten the strain relief collar in place so that the wires won’t pull loose.  
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 1025 is not polarity sensitive  
7
8
 
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.  
4. Connect one pair of wires to the two XMT (transmit) poles on  
the terminal block. The Model 1025 is not polarity sensitive,  
so either wire may connect to either pole.  
5. Connect the other pair of wires to the two RCV (receive) poles  
on the terminal block. The Model 1025 is not polarity sensi-  
tive, 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 1025s 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 con-  
nected 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 1025.  
7. When you finish connecting the wires to the terminal block,  
the assembly should resemble the diagram below:  
Once the unit has been opened, you will be able to see the  
terminal blocks located at the rear of the PC board.  
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 twisted pair wires  
about .25”.  
9
10  
 
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.  
10. Place the top half of the case as necessary to slide it over the  
strain relief assembly. Do not snap the case together yet.  
11. Insert one captive screw through a saddle washer. 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.  
4.2 CONNECTION TO THE RS-232 INTERFACE  
9. Insert the strain relief assembly and wire going into the slot in  
the bottom half of the modem case and set it into the recess  
in the case.  
Once you have connected the twisted pair wires correctly, simply  
plug the Model 1025 directly into the DB-25 port of the RS-232 device.  
After doing so, remember to insert and tighten the two captive connec-  
tor screws.  
4.2.1 CONNECTION TO A “DTE” DEVICE  
The Model 1025 is wired as a DCE, and therefore wants to plug  
into a DTE such as a terminal, PC or host. Because the Model 1025 is  
interface powered, a direct connection to the RS-232 DTE port is most  
desirable. If you must use a cable to connect the Model 1025 to the  
DTE port, make sure it is a straight through cable of the shortest possi-  
ble length—we recommend 6 feet or less.  
11  
12  
 
APPENDIX A  
SPECIFICATIONS  
4.2.2 CONNECTION TO A “DCE” DEVICE  
Since the Model 1025 is wired as a DCE, you cannot connect it  
directly to another DCE such as a modem, multiplexer or printer. If you  
need to connect the Model 1025 to another DCE device, you must use  
a null modem cable wired according to diagram below. We recom-  
mend that the cable is as short as possible, preferably 6 feet or less.  
Transmission Format: Synchronous, full duplex  
Transmission Line: Two unconditioned twisted pair 19 - 26 AWG  
Clocking: Internal, external or receive loopback  
Range: (See table below)  
Connection to Model 1025†  
DB-25 Pin No.  
Connection to DCE Device  
DB-25 Pin No.  
Interfaces: EIA RS-232, CCITT V.24  
1......................................................1  
Data Rates: 1.2 - 19.2 Kbps  
2......................................................3  
3......................................................2  
4......................................................8  
8......................................................4  
6....................................................20  
20......................................................6  
17....................................................24  
24....................................................17  
7......................................................7  
Isolation: Minimum 1500 V RMS via custom transformers  
Surge Protection: 600W Surge Protection (10x1000µs waveform)  
(Model 1025S)  
Control Signals: CTS turns on 8 or 53 mS (switch selectable) after  
the terminal raises RTS; DSR and DCD are constantly on  
Connectors: DB-25 male or female on RS-232 side; RJ-11, RJ-45 or  
Note: When connecting to another DCE device, the Model 1025  
should be configured for “external clock” (see Section 3.2).  
terminal block with strain relief on line side  
Power Supply: No external power required; uses power from EIA  
data and control signals  
4.3 OPERATING THE MODEL 1025  
Temperature Range: 0-60°C (32-140°F)  
Altitude: 0-15,000 feet  
Once the Model 1025 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 inter-  
face are passed straight through. All control signals from the RS-232  
interface are looped back.  
Humidity: Up to 95% non-condensing  
Dimensions: 2.66” x 2.10” x 0.73”  
Weight: 2 oz.  
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.  
Model 1025 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  
19,200  
9,600  
4,800  
2,400  
1,200  
13  
14  
 
APPENDIX B  
RS-232 PIN CONFIGURATIONS  
DIRECTION  
“DCE” STANDARD SETTING  
DIRECTION  
1- (FG) Frame Ground  
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 1025  
From Model 1025  
To Model 1025  
From Model 1025  
From Model 1025  
Transmitting Timing - 15  
Receiver Timing - 17  
From Model 1025  
From Model 1025  
To Model 1025  
To Model 1025  
Data Term. Ready (DTR) - 20  
Transmitting Timing (LXC) - 24  
8- (DCD) Data Carrier Detect From Model 1025  
Copyright © 1998  
Patton Electronics Company  
All Rights Reserved  
@Î  
 

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