SHM-NPR and SHM-NPR/RJ
Contents
1. lineas de energia 16 El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilaci n 18 Servicio por personal calificado deber ser provisto cuando A El cable de poder o el contacto ha sido da ado u B Objectos han ca do o l quido ha sido derramado dentro del aparato o C El aparato ha sido expuesto a la lluvia o D El aparato parece no operar normalmente o muestra un cambio en su desempe o o E El aparato ha sido tirado o su cubierta ha sido da ada Contents Chapter Page 1 a sisse We ee ES 5 2 ntroduc oh iier eite tee notieren d re nire ets 7 3 Configuration and Installation een 9 3 L Setting DLE Or DEE salini eine 9 3 2 The Installation Procedure 1 ciue een 9 4 Troubleshooting 3 e hRPRHOS PRIME 12 4 1 IfYou Have Difficulty ertet npe a a 12 4 2 Calling Black Box ettet ertet tere rh ee een 12 4 3 Shipping and Packaging eee enn 13 Appendix A RS 232 Pinout iii 14 Appendix B Maximum Distances cnn enn 15 1 Specifications Cable Required 4 wire unloaded twisted pair with DC continuity not included Compliance FCC Class A IC Class classe A Interfaces Device side Serial EIA RS 232 C DTE or DCE user selectable default DCE Line2. CHAPTER 3 Configuration and Installation 1B SHM NPR R ME821 models only Get 4 wire twisted pair cable and terminate it with RJ 11 or especially if the cable is shielded RJ 12 plugs using the pin assignments shown in Figure 3 3 for RJ 11 cable substitute Pins 1 2 3 and 4 for Pins 2 3 4 and 5 respectively and end to end wiring like that shown in Figure 3 2 on the previous page Also if the cable is shielded attach the shield to Pin 1 or 6 on one end of the cable only Plug the cable into the RJ 12 jacks on the units CAUTION Under no circumstances should you attach the cable shield to Pin 1 or 6 on both ends this could cause damaging electrical ground loops Neither should you ever connect these units to the public switched telephone system in any way This could also severely damage your equipment FEMALE MALE PINS 2 RCV 123456 Cable Pin 1 or 6 connected to shield Unit Pins 1 on one end only and 6 connected to frame ground for end to end pinning refer to Figure 3 2 on the previous page Figure 3 3 Wiring a cable for ME821 units 2 Both models Plug the units DB25 connectors into the RS 232 serial ports on the corresponding devices and tighten the mounting screws That s all there is to it Assuming your units DCE DTE switches are set properly your SHM NPR or SHM NPR RJ system should be ready for continuous operation SHMNPR_____ _ _ A Troubleshooting 4 1 If You Hav
3. If this equipment is attached to a device which requires the use of shielded cables for compliance with FCC Part 15 then use of a filtered pin connector might be required to maintain FCC compliance This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of Industry Canada Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de classe A prescrites dans le Reglement sur le brouillage radio lectrique publi par Industrie Canada NORMAS OFICIALES MEXICANAS NOM ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1 Todas las instrucciones de seguridad y operaci n deber n ser le das antes de que el aparato el ctrico sea operado 2 Las instrucciones de seguridad y operaci n deber n ser guardadas para referencia futura 3 Todas las advertencias en el aparato el ctrico y en sus instrucciones de operaci n deben ser respetadas 4 Todas las instrucciones de operaci n y uso deben ser seguidas 5 El aparato el ctrico no deber ser usado cerca del agua por ejemplo cerca de la tina de ba o lavabo s tano mojado o cerca de una alberca etc 6 El aparato el ctrico debe ser usado nicamente con carritos o pedestales que sean recomendados por el fabricante 7 El parato el ctrico debe ser montado a la pared o al techo s lo como sea recomenda
4. R is attached is still powered ON the remote SHM NPR might output spurious garbage data 0 8 H x 1 8 W x 2 2 D 1 9x 4 4 x 5 6 cm 2 oz 57 g CHAPTER 2 Introduction 2 Introduction Built using the latest surface mount technology the SHM NPR and SHM NPR RJ nonpowered short haul modems attain high quality performance in a low profile package The units operate full duplex at data rates up to 19 2 Kbps over two twisted pairs four wires They require no AC power or batteries but can support distances up to 17 miles 27 3 km see Appendix B The SHM NPR and SHM NPR R have an external DCE DTE switch so you can connect them to any type of RS 232 device without opening their chassis And you can terminate the line between pairs of these units in either of two ways The SHM NPR models have a five screw terminal block for hard wired lines and the SHM NPR RJ models have modular RJ 12 6 wire RJ 11 jacks The specially designed strain relief on the ME721 models prevents thin twisted pairs from breaking or pulling loose RS 232 device side interface DB25 male on ME721A M units DB25 female on ME721A F units DCE DTE switch oce MIT ore O O O O Balanced line side lt interface five position 00000 terminal block Figure 2 1 The SHM NPR illustrated Typical applications for these units are shown not to scale obviously in Figures 2 2 and 2 3 In Figure 2 2 short haul mo
5. V BLACK BOX M ER UR ER O O SS URN JUNE 2000 ME721A M R3 ME721A F R3 ME821A M R4 ME821A F R4 SHM NPR and SHM NPR RJ CUSTOMER Order toll free in the U S 24 hours 7 A M Monday to midnight Friday 877 877 BBOX SUPPORT FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 INFORMATION Mail order Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com FCC IC STATEMENTS FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates uses and can radiate 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 communication It 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 against such interference when the equipment is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment
6. dems are being used to connect an async host computer to a faraway terminal The thing to remember about such applications is that if the computer and terminal are too widely separated the host will time out before receiving it receives the terminal s responses In Figure 2 3 short haul modems are being used to enable a PC or server to send print jobs to a distant serial printer Figure 2 3 PC to serial printer application CHAPTER 3 Configuration and Installation 3 Configuration and Installation 3 1 Setting DTE or DCE You can configure your SHM NPR or SHM NPR RJ as either a DTE or DCE device Just slide the DCE DTE switch on the top of the unit shown in Figure 3 1 to DCE if you are connecting the unit to a DTE such as a PC terminal serial printer etc or DTE if you are connecting the unit to a DCE such as a modem You don t need to open the unit s cover to do this DCE DTE Figure 3 1 The DCE DTE switch 3 2 The Installation Procedure On its device side your SHM NPR or SHM NPR RJ is designed to be plugged directly into one of the RS 232 serial ports on a terminal computer serial printer modem etc For most applications this eliminates the need for an RS 232 C data cable If you do need to use one for whatever reason we recommend a shielded cable our EDN25C for example that carries all of the pins from which the SHM NPR draws power just make sure to keep this cable as short as possibl
7. do por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo el ctrico m s all a lo descrito en las instrucciones de operaci n Todo otro servicio deber ser referido a personal de servicio calificado 9 El aparato el ctrico debe ser situado de tal manera que su posici n no interfiera su uso La colocaci n del aparato el ctrico sobre una cama sof alfombra o superficie similar puede bloquea la ventilaci n no se debe colocar en libreros o gabinetes que impidan el flujo de aire por los orificios de ventilaci n NOM STATEMENT 10 El equipo el ctrico deber ser situado fuera del alcance de fuentes de calor como radiadores registros de calor estufas u otros aparatos incluyendo amplificadores que producen calor 11 El aparato el ctrico deber ser connectado a una fuente de poder s lo del tipo descrito en el instructivo de operaci n o como se indique en el aparato 12 Precauci n debe ser tomada de tal manera que la tierra fisica y la polarizaci n del equipo no sea eliminada 13 Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos poniendo particular atenci n a los contactos y recept culos donde salen del aparato 14 El equipo el ctrico debe ser limpiado nicamente de acuerdo a las recomendaciones del fabricante 15 En caso de existir una antena externa deber ser localizada lejos de las
8. e No power is required from a dedicated AC or DC source because the unit is powered entirely by the attached device s control and data signals On its line side your SHM NPR or SHM NPR R has a proprietary balanced 4 wire twisted pair communication line interface To install a pair of these units take these steps 1A SHM NPR ME721 models only Making sure that they are not connected to any other device or any power source gently pry the units open using a small screwdriver or similar tool wedged into one of the indentations on either side of the units cases This will reveal a 5 screw terminal block mounted inside each unit Run 4 wire twisted pair cable not included from one block to the other as shown in Figure 3 2 one pair TX A to RX A and TX B to RX B the other pair RX A to TX A and RX B to TX B and the shield if the cable is shielded to the ground middle screw on one end of the cable only When you are finished lay the cable in the semicircle where it will emerge from the unit so that the strain relief prongs can pierce the cable jacket then close the unit back up CAUTION Under no circumstances should you attach the cable shield to the ground screws on both ends this could cause damaging electrical ground loops Neither should you ever connect these units to the public switched telephone system in any way This could also severely damage your equipment Figure 3 2 Wiring a pair of ME721 units
9. e Difficulty If your SHM NPR or SHM NPR R system does not seem to be operating properly here are a few things to check first 1 Is the DCE DTE switch set correctly on each of the short haul modems If the attached device is a DTE computer PC terminal printer etc this switch should be set to DCE if the attached device is a DCE modem etc this switch should be set to DTE See also Section 3 1 2 Check all external connections Make sure they are firm and secure 3 SHM NPR ME721 only Detach the unit from the device and open its case Make sure that none of the wires have come loose from the terminal block 4 Use a cable tester to test the cable for continuity and pinning If you still can t determine what is causing the problem call Black Box Technical Support as described in the next section 4 2 Calling Black Box If you determine that your SHM NPR or SHM NPR R is malfunctioning do not attempt to alter or repair the unit It contains no user serviceable parts Contact Black Box Technical Support at 724 746 5500 Before you do make a record of the history of the problem We will be able to provide more efficient and accurate assistance if you have a complete description including e the nature and duration of the problem when the problem occurs the components involved in the problem any particular application that when used appears to create the problem or make it worse the results of any
10. re for noiseless environments with not more than 20 of peak to peak distortion figures for lines run through electrically noisy environments near fluorescent lighting elevators generators compressors or motors for example will be dramatically lower Data Maximum Distance in Miles km for Rate Cable Gauge AWG diameter bPS 49 09 mm 24 0 5mm 26 04mm 19 200 2 9 9 7 5 9 1 2 1 9 9 600 5 12 0 9 7 8 2 5 4 0 4 800 7 13 9 6 9 0 8 7 5 9 2 400 11 8 18 9 0 12 8 4 9 7 8 1 200 17 0 27 2 11 8 18 9 8 0 12 8 amp BLACK BOX OCopyright 2000 Black Box Corporation All rights reserved 1000 Park Drive e Lawrence PA 15055 1018 e 724 746 5500 e Fax 724 746 0746
11. side Proprietary balanced 4 wire Protocol Asynchronous Data Format Transparent to data format Flow Control Does not support hardware flow control uses RS 232 control leads as power sources transparent to software flow control Operation 4 wire full duplex Data Rate Up to 19 200 bps Maximum Distance Up to 17 mi 27 3 km depending on cable gauge and data rate see Appendix B User Controls 1 Top mounted DCE DTE slide switch Indicators None Connectors ME721A M ME821A M models 1 Front mounted DB25 male ME721A F ME821A F models 1 Front mounted DB25 female ME721 models 1 Internal 5 screw terminal block with strain relief ME821 models 1 Rear mounted RJ 12 6 wire RJ 11 female Leads Supported DB25 RS 232 See Appendix A Temperature Tolerance Humidity Tolerance Enclosure Power Size Weight 32 to 112 F 0 to 50 C Up to 95 noncondensing High impact plastic 12 VDC 6 3 mA from RS 232 interface From Pins 2 4 9 and or 20 if the attached device is DTE From Pins 3 5 6 8 and or 9 if the attached device is DCE CAUTION When the device to which a SHM NPR is attached is powered down that SHM NPR also loses power and can no longer send any signals to the remote SHM NPR In this condition the idled cable between the units becomes susceptible to receiving noise If it does and the device to which the remote SHM NP
12. testing you ve already done CHAPTER 4 Troubleshooting 4 3 Shipping and Packaging If you need to transport or ship your SHM NPR or SHM NPR R e Package it carefully We recommend that you use the original container e If you are returning the unit make sure you include everything your received with it Before you ship the unit back to us for whatever reason contact Black Box to get a Return Materials Authorization RMA number EXT Appendix A RS 232 Pinout The table below shows how the RS 232 C ports of the SHM NPR and SHM NPR RJ are pinned out Please note that even though the control and voltage signals are listed they are used only to help power the units only the data signals are carried across the line PIN CIRC DESCRIPTION FUNCTION DIRECTION 1 AA Protective Ground Ground N A 2 BA Transmitted Data Data To DCE 3 BB Receive Data Data From DCE 4 CA Request to Send Control To DCE 5 CB Clear to Send Control From DCE 6 CC Data Set Ready Control From DCE 7 AB Signal Ground Ground N A 8 CF Data Carrier Detect Control From DCE 9 12 VDC Voltage From attached device 20 CD Data Terminal Ready Control To DCE Note Pins 1 amp 7 are tied together inside the unit as are Pins 4 amp 5 and Pins 6 8 amp 20 Appendix B Maximum Distances The table below shows how far pairs of SHM NPRs and SHM NPR RJs can transmit data to each other at specified cable thicknesses and data rates Please note that these measurements a
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