USER MANUAL
Contents
1. 2020N 2 4071 x 1 73 H x 0 89 W 6 10cmL x 4 39cmH x 2 26cmW Model 2020 14 oz including cable and connectors Model 2020N 2 2 oz APPENDIX V 35 INTERFACE STANDARDS CCITT V 35 EIA 530 INTERFACE DB 25 APPENDIX C RS 232 INTERFACE STANDARDS FG Frame Ground Transmit Data A Receive Data A RTS Request to Send CTS Clear to Send DSR Data Set Ready Transmit Data B 14 Transmit Clock A 15 Receive Data B 16 Receive Clock A 17 SG Signal Ground CD Carrier Detect Receive Clock B Data Term Ready DTR 20 OMAN DAK ON 11 External Clock B External Clock A 24 12 Transmit Clock RS 232C V 24 INTERFACE DB 25 CCITT V 35 Interface M 34 Male A Frame Ground C Request to Send E Data Set Ready H Data Terminal Ready K M P Transmitted Data A S Transmitted Data B U Terminal Timing A W Terminal Timing B Y Transmit Timing A AA Transmit Timing B Signal Ground B Clear To Send D Data Carrier Detect F Receive Data A Receive Data B Receive Timing R T Receive Timing B X FG Frame Ground TD Transmit Data RD Receive Data TS Request to Send 1 2 Transmit Clock 15 3 4 R 5 CTS Clear to Send 6 D 7 8 Receive Clock 17 SR Data Set Ready SG Signal Ground Data Term Ready DTR 20 DCD Data Carrier Detect External C2. pull the entire green strap out of its socket and rotate it 180 degrees Then plug it back into the socket You will see that the arrows on top now point in the opposite directions showing the new DCE DTE orientation of the Model 2020 When you re done realign the case halves don t forget the captive screws and saddle washers and snap them back together 4 0 INSTALLATION After you have configured the DCE DTE strap all you need to do is plug the Model 2020 or 2020N into the proper device ports Figures 4 and 5 showhow to intstall the Model 2020 2020N NOTE The diagrams below show the Model 2020 in the installed application If you are using a Model 2020N connect the RS 232 interface directly to the RS 232 equipment and connect the V 35 interface to the V 35 interface using a cable no longer than 164 feet 50m 4 1 CONNECTING AN RS 232 DTE TO A V 35 DCE Figure 4 below illustrates proper connection of an RS 232 DTE to a V 35 DCE using the Model 2020 The RS 232 interface of the Model 2020 2020N must be configured as DCE Sync Terminal DTE 7 NA V 35 Modem DCE Figure 4 A Common RS 232 DTE to V 35 DCE Installation 4 2 CONNECTING A V 35 DTE TO AN RS 232 DCE Figure 5 below illustrates proper connection of a V 35 DTE to an RS 232 DCE using the Model 2020 The RS 232 interface of the Model 2020 2020N must b
3. USER MANUAL MODEL 2020 and MODEL 2020N Interface Powered RS 232 to V 35 Converters PATTON nlecironics Uo ISO Part 07M2020 D Doc 4077011UD Revised 11 6 97 An 180 9001 Certified Company 1 1 RADIO AND INTERFERENCE The Models 2020 and 2020N generate and use radio frequency energy and if not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio and television reception The Model 2020 2020N has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules which are designed to provide reasonable protection from such interference in a commercial installation However there is no guarantee that interference will not occur in a particular installation If the Model 2020 2020N does cause interference to radio or television reception which can be determined by disconnecting the RS 232 or V 35 interface the user is encouraged to try to correct the interference by one or more of the following measures moving the computing equipment away from the receiver re orienting the receiving antenna and or plugging the receiving equipment into a different AC outlet such that the computing equipment and receiver are on different branches 1 2 CE NOTICE The CE symbol on your Patton Electronics equipment indicates that it is in compliance wit
4. e configured as DTE V 35 Mini Computer DTE Sync Modem DCE Figure 5 A common V 35 DTE to RS 232 DCE installation 4 3 CONNECTING THE MODEL 2020 25 The Model 2020 25 is connected the same way as the standard Model 2020 with the exception that the V 35 interface has a DB 25 connector instead of an M 34 connector The DB 25 carries the same signals as the M 34 but is pinned according to the RS 530 Standard Please refer to Appendix B for specific pin out information 7 APPENDIX A MODEL 2020 AND 2020N SPECIFICATIONS Interfaces Data Rates Transmission Mode Protocol Clocking Connectors Power Supply Temperature Range Altitude Humidity Dimensions Weight EIA RS 232 ITU CCITT V 24 to ITU CCITT V 35 EIA RS 530 0 384 Kbps Synchronous full or half duplex Transparent to protocol Set by connected devices All Versions DB 25 male or female on RS 232 side Model 2020 M 34 male or female on V 35 side at the end of 6 ft cable Model 2020 25 DB 25 male or female on V 35 side at the end of 6 ft cable Model 2020N RS 232 Male with M 34 male or female on V 35 side OR RS 232 female with M 34 male None required Uses power from NIC data and control signals 0 60 degrees C 32 140 degrees F 0 15 000 feet 0 5 000 meters 5 to 95 noncondensing Model 2020 2 66 L x 2 10 H x 0 73 W 6 76cmL x 5 33cmH x 1 85cmW Model
5. h the Electromagnetic Compatibility EMC directive and the Low Voltage Directive LVD of the Union European EU A Certificate of Compliance is available by contacting Technical Support 2 0 GENERAL INFORMATION 2 1 FEATURES Bi directionally converts synchronous RS 232 to V 35 Data rates to 384 Kbps full or half duplex Transparent to protocol No AC power or batteries required DCE DTE strap selectable DB 25 and M 34 connectors with integral 6 ft cable Model 2020 Dual DB 25 connectors with integral 6ft cable Model 2020 25 DB 25 and M 34 connectors in one plastic enclosure Model 2020N Circuitry housed in ultra miniature case Made in the USA 2 2 DESCRIPTION The Model 2020 and 2020N RS 232 to V 35 converters let a synchronous RS 232 device communicate bi directionally with a synchronous V 35 device The Model 2020 2020N require no AC power or batteries to operate and supports data rates to 384 Kbps Operating full or half duplex the Model 2020 passes all necessary clocking and control signals and is transparent to protocol The Model 2020 connects directly to the synchronous RS 232 interface using a male or female DB 25 connector A male or female M 34 connector at the end of an integral 6 ft cable plugs into the V 35 device The Model 2020 25 substitutes a male or female DB 25 on the V 35 interface The Model 2020N house both DB 25 and M 34 connectors within the same enclosure An internal DCE DTE
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7. ports are DTE or DCE 3 1 1 OPENING THE CASE The DCE DTE strap on the Model 2020 2020N is located on the PC board To access the PC board you will need to open the plastic case 1 Simply insert a small flathead screw driver or similar tool between the DB 25 connector and the lip of the case as shown in Figure 1 below RS 232 Interface Figure 1 Inserting the screw driver 4 2 Gently twist the screw driver to pop the case open as shown Figure 2 below Be careful not to damage the case or connector as you twist the screw driver RS 232 Interface Figure 2 Popping open the case 3 Once you have opened the case of the Model 2020 2020N you will see the green DCE DTE strap located on the PC board in the position shown in Figure 3 below The DCE DTE strap is oriented closest to the RS 232 interface DCE DTE RS 232 Sirap Interface UHUUUUUUUUUU 1 DCE DTE Y Figure 3 DCE DTE strap orientation on PC board 4 arrows on top of the strap indicate the orientation of the Model 2020 s ports For example if the DCE arrow is pointing toward the DB 25 connector then the Model 2020 2020N s strap is set so that it sees its DB 25 port as DCE It wants to plug into the DB 25 port of a terminal or other DTE The arrow pointing toward the cable at the rear of the PC board shows the orientation of the Model 2020 s V 35 port To reverse the DCE DTE orientation
8. strap allows the user to configure the Model 2020 2020N as DCE to DTE or DTE to DCE In most cases this eliminates the need for special crossover cables Housed in an ultra miniature case measuring only 2 66 x 2 10 x 0 73 the Model 2020 fits easily into tight locations The Model 2020N measures a tiny 3 20 L x 2 10 H x 0 90 W 3 0 CONFIGURATION The Model 2020 2020N is designed to be easy to use In most cases you will not need to configure the Model 2020 2020N in any way just plug it in and go The Model 2020 is transparent to protocol including data rate and clocking method the only configuration you may need to do is for DTE DCE orientation This procedure is described below 3 4 SETTING DCE DTE ORIENTATION The Model 2020 2020N installs between DTE devices such as terminals and host computers and DCE devices such as modems multiplexers and CSU DSUs Most often the DTE device will be RS 232 and the DCE device will be V 35 Therefore the default DCE DTE setting for the Model 2020 is RS 232 DCE to V 35 DTE based on how the Model 2020 sees its own orientation For example if the Model 2020 sees its own RS 232 port as DCE it will want to plug into an RS 232 DTE device such as a terminal If you need to reverse the DCE DTE orientation of the Model 2020 so that the RS 232 port is DTE and the V 35 port is DCE follow the step by step instructions below note it is not possible to configure the Model 2020 2020N so that both
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