Patton electronic Marine Battery 222N9 User Manual

USER  
MANUAL  
MODEL 222N9  
Ultra-miniature RS-232  
(EIA-574) to RS-422  
Interface Converter  
Part #07M222N9-B  
SALES OFFICE  
Doc. #030013U,  
Rev. C  
(301) 975-1000  
TECHNICAL SUPPORT  
(301) 975-1007  
Revised 1/21/08  
C
E
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T
I
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An ISO-9001  
Certified Company  
 
1.3 SERVICE  
All warranty and non-warranty 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 Service at (301) 975-1007, http://www.patton.com, or  
NOTE: Packages received without an RMA number will not be  
accepted.  
Patton Electronics' technical staff is also available to answer any  
questions that might arise concerning the installation or use of your  
Model 222N9. Technical Service hours: 8AM to 5PM EST, Monday  
through Friday.  
2
 
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 do not hesitate to  
contact Patton Electronics Technical Support at (301) 975-1007.  
2.1 FEATURES  
• Conforms to EIA RS-422 Standard  
• Bi-directional data conversion  
• Data Rates to 19.2 Kbps over two twisted pair  
• No AC power required–draws operating power from RS-232 signals  
• Passes transmit and receive data–handshaking lines looped back  
• Convenient thumb screws on DB-9 (female) interface  
• Ultra-miniature size (2.50" x 1.20" x 0.75")  
• Twisted pair connection via strain relief, RJ-11 or RJ-45  
• Made in the USA  
2.2 DESCRIPTION  
The Patton Model 222N9 RS-232 (EIA-574) to RS-422 interface  
converter allows asynchronous PCs, terminals and laptops employing  
the EIA-574 (RS-232/ DB-9) interface to communicate with devices  
using RS-422 balanced electrical signals. Facilitating bi-directional  
data conversion over two twisted pair, the Model 222N9 draws all  
necessary operating power from data and control voltages on the EIA-  
574 interface. The Model 222N9 supports data rates to 19.2 Kbps and  
distances to 4000 feet. All control signals are looped back at the EIA-  
574 interface.  
The Model 222N9 is housed in an ultra-miniature ABS plastic  
enclosure measuring 2.5”L x 1.2” H x .75” W. Options for twisted pair  
connection on the RS-422 side include terminal block with strain relief,  
RJ-11 and RJ-45. The EIA-574 side is available with a choice of male  
or female DB-9 connector.  
The surge protected Model 222N9S uses high speed avalanche  
diodes to intercept data line transient surges and shunt them safely to  
chassis ground. Compliant with IEC 801.5 level 2, 1kV, the 222N9S  
can protect itself and connected equipment from nearby lightning  
strikes, and other surges of electromagnetic radiation.  
3
 
3.0 INSTALLATION  
The Model 222N9 is easy to install and requires no pre-  
configuration. This section tells you how to properly connect the Model  
222N9 to the RS-422 (twisted pair) and EIA-574 (DB-9) interfaces, and  
how to operate the Model 222N9.  
3.1 CONNECTION TO THE RS-422 INTERFACE  
The Model 222N9 supports data-only communication distances up  
to 4000 feet between itself and the RS-422 device. To function  
properly, the Model 222N9 must have two twisted pairs of metallic wire.  
These pairs must be dry, unconditioned metallic wire, between 19 and  
26 AWG (the higher number gauges may limit distance somewhat).  
For your convenience, the Model 222N9 is available with several  
different physical interfaces on the RS-422 side: RJ-11 jack, RJ-45  
jack, and terminal blocks with strain relief.  
3.1.1 TWISTED PAIR CONNECTION USING RJ-11 OR RJ-45  
The RJ-11 and RJ-45 connectors on the Model 222N9's twisted pair  
interface are pre-wired for a standard TELCO wiring environment. The  
signal/pin relationships are shown below:  
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  
When connecting two Model 222N9s it is necessary to use a "cross  
over" cable. The diagram below shows how a cross over cable should  
be constructed for an environment where both Model 222N9s use a 6-  
wire RJ-11 connector. Similar logic should be followed when using RJ-  
45 connectors or a combination of the two.  
4
 
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  
*Connection to Ground is Optional  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
3.1.2 TERMINAL BLOCK TWISTED PAIR CONNECTION  
If your application requires you to connect one or two pairs of bare  
wires to the Model 222N9, you will need to access the internal 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.  
Note: The terminal block configurations are different for the  
222N9M (male) and 222N9F (female).  
XMT  
G
RCV  
RCV  
+
G
XMT  
+
-
-
+
-
+
-
222N9M  
222N9F  
1. Open the unit by gently inserting a screw driver between the DB-9  
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.  
(Continued)  
5
 
Once the unit has been opened, you will be able to see the  
terminal block 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".  
4. Connect one pair of wires to XMT+ and XMT- (transmit positive  
and negative) on the terminal block, making careful note of which color  
is positive, and which color is negative.  
6
 
5. Connect the other pair of wires to RCV+ and RCV- (receive  
positive and negative) on the terminal block, again making careful note  
of which color is positive, and which color is negative.  
Ultimately, you will want to construct a two pair cross over cable that  
makes a connection with the RS-422 device as shown below:  
Model 222N9  
RS-422 Device  
XMT+.............................RCV+  
XMT-..............................RCV-  
RCV+.............................XMT+  
RCV-..............................XMT-  
6. If there is a shield around the telephone cable, it may be  
connected to "G" on the terminal block. We recommend connecting the  
shield at the computer end only to avoid ground loops. A ground wire is  
not necessary for proper operation of the Model 222N9.  
7. When you finish connecting the wires to the terminal block, the  
assembly should resemble the diagram below:  
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.  
(Continued)  
7
 
9. Insert the strain relief assembly with the wire going through it  
into the slot in the bottom half of the modem case and seat it into the  
recess in the case. (If the telephone wire is too thin to be held by the  
strain relief assembly, you will need to order a different sized strain  
relief. Call Patton's Sales Department at (301) 975-1000.)  
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.  
11. Insert one captive screw through a saddle washer and then  
insert the captive screw with the washer on it, 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 the cable installation  
process.  
8
 
3.2 CONNECTION TO THE EIA-574 (RS-232) INTERFACE  
The Model 222N9 is configured as a DCE, and is wired according  
to the EIA-574 standard.  
EIA-574 Standard  
DB-9  
SIGNAL  
3---------------------TD  
2---------------------RD  
7---------------------RTS  
8---------------------CTS  
1---------------------CD  
4---------------------DTR  
6---------------------DSR  
5---------------------SG/FG  
Due to its small size, the Model 222N9 is able to plug directly into  
the serial port of your EIA-574 DTE device (PC, laptop, etc.). If you  
must use a cable to connect the Model 222N9 to the DTE device, make  
sure that it is a straight through cable of the shortest possible  
length—we recommend 6 ft or less.  
3.3 OPERATING THE MODEL 222N9  
Once the Model 222N9 is properly installed, it should operate  
transparently—as if it were a standard cable connection. Operating  
power is derived from the EIA-574 data and control signals; there is no  
"ON/OFF" switch. All data from the EIA-574 interface, including  
X-ON/X-OFF flow control information, is passed straight through. Any  
hardware flow control signals are looped back at the interface and are  
not passed between the short hauls.  
9
 
APPENDIX A  
PATTON MODEL 222N9 SPECIFICATIONS  
Transmission Format: Asynchronous  
Data Rate:  
0 to 19,200 bps (no strapping)  
Control Signal:  
CTS (Pin 8) turns ON immediately after the  
terminal raises RTS (Pin 7). DSR (Pin 6)  
and DCD (Pin 1) turn ON immediately after  
the terminal raises DTR (Pin 4).  
Transmit Line:  
Transmit Mode:  
Transmit Level:  
Line Connection:  
4 wire, unconditioned line (2 twisted pairs)  
Full Duplex, 4-wire  
0 dBm  
RJ-11 or RJ-45 jack or 5 screw terminal  
posts (4 wires and 1 ground) and a strain  
relief insert. Works well with data signals  
only.  
Power Supply:  
Surge Protection:  
Size:  
None required, uses ultra low power from  
EIA data and control signals  
Compliant with IEC 801.5 level 2, 1kV  
(Model 222N9S Only)  
2.50" x 1.2" x .75"  
10  
 
APPENDIX B  
PATTON MODEL 222N9 CABLE RECOMMENDATIONS  
The Patton Model 222N operates at frequencies of 20kHz or less  
and has been performance tested by Patton technicians using twisted-  
pair cable with the following characteristics:  
Wire Gauge  
Capacitance  
Resistance  
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.  
To gain optimum performance from the Model 222N, please keep  
the following guidelines in mind:  
Always use twisted pair wire—this is not an option.  
• Use twisted pair wire with a capacitance of 20pf/ft or less.  
• Avoid twisted pair wire thinner than 26 AWG (i.e. avoid higher  
AWG numbers than 26)  
• 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.  
• Environmental factors too numerous to mention can affect the  
maximum distances obtainable at a particular site. Use “maximum  
distance” figures as a general guideline only.  
11  
 
APPENDIX C  
PATTON MODEL 222N9 PIN ASSIGNMENTS  
EIA-574 (RS-232) Interface  
(DB-9 Connector)  
EIA-574 Interface  
Signal/Voltage  
Source  
Signal/Voltage  
Source  
Signal Designations  
Signal Designations  
1
2
3
4
5
Receive Line Signal Detector  
Received Data  
DCE  
DCE  
DCE  
DTE  
DCE  
DCE  
Data Set Ready  
6
7
8
9
Request To Send  
Clear To Send  
Ring Indicator  
Transmitted Data  
DTE  
Data Terminal Ready  
Ground/common Return  
DTE  
Common  
EIA-422 Interface  
(RJ-11 Female Connector)  
RJ-11 (6 Pin)  
SIGNAL/PIN #  
1 - (G) Ground  
2 -(RCV-) Receive Data +  
3 -(XMT+) Transmit Data -  
4 -(XMT-) Transmit Data -  
5 -(RCV+) Receive Data +  
6 - (G) Ground  
EIA-422 Interface  
(RJ-45 Female Connector)  
RJ-45 (8 Pin)  
SIGNAL/PIN #  
1 - no connection  
2 - (G) Ground  
3 - (RCV-) Receive Data -  
4 - (XMT+) Transmit Data +  
5 - (XMT-) Transmit Data -  
6 - (RCV+) Receive Data +  
7 - (G) Ground  
8 - no connection  
NOTE: Signals XMT+ and XMT- are the EIA=422 “A” and “B” transmitters, respectively;  
Signals RCV+ and RCV- are the EIA-422 “A” and “B” receivers, respectively.  
12  
 
APPENDIX D  
PATTON MODEL 222N9 BLOCK DIAGRAM  
13  
 
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:  
Sales E-mail:  
Support E-mail:  
Phone - Sales  
Phone - Support  
Fax:  
(301) 975-1000  
(301) 975-1007  
(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 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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_______________________________________________________________  
_______________________________________________________________  
_______________________________________________________________  
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Copyright © 1997  
Patton Electronics Company  
All Rights Reserved  
 

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