Local Mux-6
Contents
1. WHEN Figure 4 1 Local Mux 6 Front Panel Table 4 1 Local Mux 6 Indicators Item Indicator Function Power Green LED lights when power is present Yellow LED lights when either local or remote unit is performing a test Local Sync Loss Red LED lights when synchronization is lost at the local unit Remote Sync Loss Red LED lights when synchronization is lost at the remote unit Table 4 2 Local Mux 6 Switches When pressed pushed in the unit performs local loopback When pressed pushed in the unit performs remote loopback 4 3 Operating Procedure WARNING BEFORE SWITCHING ON THIS INSTRUMENT the protective earth terminals of this instrument must be connected to the protective conductor of the mains power cord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact Do NOT use an extension cord power cable without a protective conductor grounding Make sure that only fuses with the required rated current are used for replacement The use of repaired fuses and the short circuiting of fuse holders must be avoided Whenever it is likely that the protection offered by fuses has been impaired the instrument must be made inoperative and secured against any unintended operation Turning On the Power Apply AC power by connecting the AC power cord to an acceptable AC source If the power indicator lights then the Local Mux 6 is powered I2. BL ACK BOX 515 MX515AE Local Mux 6 o nn nn ng AE CUSTOMER Order toll free in the U S Call 877 877 BBOX outside U S call 724 746 5500 SUPPORT FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 INFORMATION Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com FEDERAL COMMUNICATIONS COMMISSION AND CANADIAN DEPARTMENT OF COMMUNICATIONS 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 This d
3. 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 danado 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 Elaparato ha sido tirado o su cubierta ha sido danada TRADEMARKS All applied for and registered trademarks are the property of their respective owners Contents Ls Sp cifications ive u eed e mene ev Ae ee eie a 8 LI Sub Charnnel 25422522 9 xe eee Pe oe reta 8 1 2 Mam Channel xiii ri eere DERE 8 1 3 General usb coe eek etre quee be eer ecg nta race 9 2 IntroductiON umet Rech EUER E Rie MER eR AR l ue s du 10 2 T General 2 eI MER eds 10 2 2 Functional Description sss uu a sasawa saa 10 2 3 caes ese E Ree e pb plan 11 Instalator se rui us aus ak dues t ha a we E Auta e eR Q wg 14 3 1 Site Preparation ie RE RES ERR Cv eR RE prn 14 3 2 14 5 5 Installation 19 Racks Re Ie de 15 959 General vehe Gace PIS eus 15 3 3 2 Installation Of Unit u u u u uuu e HE 15 3 4 Electrical Installation 16 ACLPOWeE PERDE de
4. Receive Data Request to Send Clear to Send Data Set Ready Receive Line Signal Detector Carrier Detect 8 volts 8 volts isolated from signal ground Common signal and DC power supply ground Serial digital data from a terminal or other source into the Local Mux 6 Serial digital data output from the Local Mux 6 A positive level to the Local Mux 6 when data transmission is desired A positive level from the Local Mux 6 if data transmission is possible A positive DC voltage 48V from the Local Mux 6 indicating the unit is powered A positive level from the Local Mux 6 except when either a sync loss occurs or remote loopback is performed These signals are reserved for data set testing and for powering miniature modems NOTE Pin numbers in parentheses are for the secondary channel available when using a channel doubler cable Local Mux 6 Sub Channel Connector Channel Doubler Protective Ground Transmitted Data TD Received Data RD Request to Send RTS Clear to Send CTS Data Set Ready DSR Received Line Signal Detector Not used Signal Ground Secondary TD Secondary RD Secondary RTS Secondary CTS Secondary DSR Secondary RLSD Not used Figure 3 4 Connecting Channel Doubler to Local Mux 6 Sub Channel Local Mux 6 Sub Channel Connector Channel Doubler Protective Ground 1 1 Transmitted Data TD 2 2 Received Data RD 3 3 Reque
5. 6 CHANNELS Figure 3 1 Strapping Diagram 3 3 Installation in 19 Racks 3 3 1 GENERAL The Local Mux 6 can be installed in a 19 rack Its height is slightly less than 1U 1 75 and the width is slightly less than the available mounting width WARNING Disconnect the units from mains power while performing the following procedures If you don t you could be shocked 3 3 2 INSTALLATION OF A UNIT The rack adapter components for single unit installation include two short brackets The brackets are fastened by means of screws to the side walls for the case as shown in Figure 3 2 The brackets are attached to the two side walls of the unit 1 To prepare the unit for rack installation attach the two brackets to the side walls of the unit Each bracket is fastened by means of two screws with flatwashers which are inserted into the two front holes on the wide wall nuts are already in place on the inner side of the wall 2 After attaching the brackets the unit is ready for installation in the 19 rack Fasten the brackets to the side rails of the 19 rack by means of four screws two per side LOCAL MUX 6 Figure 3 2 Installation of a Unit in a 19 Rack 3 4 Electrical Installation In the following discussions refer to Figure 3 3 rear panel 3 4 1 AC POWER AC power is supplied to the Local Mux 6 through a 5 feet 1 5 m cord terminated by a grounded 3 wire plug The AC cord is fused at the rear pa
6. supply circuits Red LOCAL SYNC LOSS is ON a Perform LLB Yellow TEST indicator should light and LOCAL SYNC LOSS should go OFF If not replace the local unit Otherwise proceed to step b b Perform local RLB Yellow TEST indicator should light and LOCAL SYNC LOSS should go OFF In that case replace the remote unit Otherwise proceed to step c c Perform steps a and b at the remote site If the fault is still not located replace both units one at a time If the problem remains the main channel link between the units is probably defective and should be checked Red REMOTE SYNC LOSS is ON Perform all the tests as in the case of LOCAL SYNC LOSS starting at the remote site BLACK BOX Copyright 1997 Black Box Corporation All rights reserved 1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746
7. al Mux 6 units may be installed in a ring type configuration refer to Figure 2 2 At each site the unconnected channels must be bypassed by shorting Pins 2 and 3 of the relevant sub channel connector Table 2 2 Distortion Data Rate Distortion Number of on Each per Node Nodes Sites Sub Channel 19 2 kbps 25 00 2 9 6 kbps 12 50 3 4 8 kbps 6 250 4 2 4 kbps 3 125 8 1 2 kbps 1 5625 16 NT 2 WIRE R 3 3 4 A 5 24 DW 2 WIRE 2 WIRE T R E 8 R 2 WIRE T 5 Figure 2 2 Typical Ring Installation 3 Installation 3 1 Site Preparation The Local Mux 6 must be installed within 5 feet 1 5 m of a grounded AC outlet 3 2 Setup Unscrew the two upper cover screws located at the back of the unit refer to Figure 3 3 Slide the rear drawer out oo Locate the strap marked select 6 or 12 channels indicated by an arrow on the circuit board For up to 6 channels with no control applications place the strap between the center pin and the one marked 6 For other applications place the strap between the center pin and the one marked 12 refer to Figure 3 1 4 Locate the strap marked GND According to your requirements set the signal ground to be connected to shielding chassis ground or floating NC 5 Replace the rear drawer 6 Fasten the two upper cover screws at the back of the unit 12 SELECT 6 OR 12 e
8. cator Red On when synchronization is lost at local unit Remote Sync Loss Indicator Red On when synchronization is lost at remote unit LLB Switch When pressed unit is performing local loopback RLB Switch When pressed unit is performing remote loopback Physical Description Size 1 72 H 1U x 13 3 W x 8 6 D 4 4 x 33 8 x 22 cm Weight 3 5 Ib 1 6 kg Environment Temperature 32 to 122 F 0 to 50 C Humidity Up to 90 non condensing Power Power Requirements MX515A 115 VAC 60 Hz MX515AE 230 VAC 50 Hz 2 Introduction 2 1 General The Local Mux 6 is a full duplex time division asynchronous multiplexor enabling up to twelve async terminals to be multiplexed onto a single channel The Local Mux 6 is intended for use in manufacturing facilities building complexes campuses and other similar point to point applications 2 2 Functional Description The Local Mux 6 contains six sub channels that can be expanded to twelve through connection of channel doubler cables The number of channels available 6 12 is set by a user selectable strap When the unit is set for six channels each channel can be used to transmit full duplex data end to end When the unit is set for twelve channels each sub channel can be used for either data or control signal transmission according to the specific application For example six channels can be used to transmit full duplex data and six can be used to transmit contr
9. crito en las instrucciones de operaci n Todo otro servicio deber ser referido a personal de servicio calificado 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 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 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 lineas de energia 16 El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo
10. e be g E Q uQ 16 3 4 2 Sub Channels eee ee ees 16 3 4 3 Main Channel ru t nnn 17 4 Operating Instructions eee ERROR E Ret RAE ES 21 AL General u yusa eo sert S e QR ERROR Wu R 21 4 2 Controls and Indicators 21 4 5 Operating Procedure scios cokes edere uer 23 4 4 System pusu cray tenu sexe maaa aided me SUE 24 4 5 Fault Isolation annd Troubleshooting 25 1 Specifications 1 1 Sub Channels Transmission Format Asynchronous Data Rate Up to 19 2 kbps refer to Table 2 1 Distortion Refer to Table 2 1 Interface EIA RS 232 C CCITT V 24 Connectors 6 DB25 female Number of Sub channels Up to twelve by attaching a channel doubler to each of the connectors Mode of Operation Full duplex 1 2 Main Channel Electrical Interface Transmission Line 4 wire unconditioned telephone lines two twisted pairs Operating Range Maximum of 1 6 km 1 mile on 22 AWG cable Data Rate 1 2288 Mbps Output Format Balanced transformer isolated 6 Vp p on 100 Q Input Resistance 100 Connector Terminal block 1 3 General Diagnostics Local digital loopback Activated by pushbutton Remote digital loopback Activated by pushbutton Switches Indicators Power Indicator Green On when unit is powered Test Indicator Yellow On when local or remote unit is performing a loopback Local Sync Loss Indi
11. f the local and remote Local Mux 6 units are in operation and properly connected via the main channel no other indicator should be ON If any other indicators light refer to Section 4 5 for troubleshooting information Operation The Local Mux 6 operates entirely unattended except when performing system tests Turning Off the Power To turn off Local Mux 6 simply remove the AC power cord from the AC source Operational Field Strapping Changes If you need to reconfigure the Local Mux 6 for twelve channel mode or six channel mode follow the appropriate set up procedure described in Section 3 2 LOCAL MUX 6 4 4 System Tests Two system tests are available in the Local Mux 6 local loopback and remote loopback Local Loopback When performing local loopback the data from the local transmitter is looped back to the local receiver at the digital level thus checking all local digital circuitry for proper operation This test is activated by pressing the LLB push button on the front panel If the local unit is operating properly the yellow TEST indicator should light and all other indicators should be OFF If the local and remote units are properly connected via the main channel the local transmitter analog interface and both the remote analog and digital receiver sections are checked The yellow TEST indicator on the remote unit should also be lit if the units are properly connected Remote Loopback Remote loopback loo
12. igital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of the Canadian Department of Communications 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 le minist re des Communications du Canada LOCAL MUX 6 10 11 NORMAS OFICIALES MEXICANAS NOM ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD Todas las instrucciones de seguridad y operaci n deber n ser le das antes de que el aparato el ctrico sea operado Las instrucciones de seguridad y operaci n deber n ser guardadas para referencia futura Todas las advertencias en el aparato el ctrico y en sus instrucciones de operaci n deben ser respetadas Todas las instrucciones de operaci n y uso deben ser seguidas El aparato el ctrico no deber ser usado cerca del agua por ejemplo cerca de la tina de bano lavabo s tano mojado o cerca de una alberca etc El aparato el ctrico debe ser usado nicamente con carritos o pedestales que sean recomendados por el fabricante El aparato el ctrico debe ser montado a la pared o al techo s lo como sea recomendado por el fabricante Servicio El usuario no debe intentar dar servicio al equipo el ctrico m s all a lo des
13. nel AC power receptacle of the unit A slow blow fuse of 0 1A is required for 230V operation and a 0 2A fuse is required for 115V operation 3 4 2 SUB CHANNELS Six D type 25 pin female connectors on the rear panel enable connection to the unit Detailed information about the signals present at these connectors is given in Table 3 1 For twelve channel operation channel doublers CD are required Refer to Figure 3 4 for the pinout of the CD For six channel operation with full duplex data and end to end control signals on each channel refer to Figure 3 5 DTR to DSR control signal or to Figure 3 6 RTS to DCD control signal 3 4 3 MAIN CHANNEL A 5 screw terminal block is located at the rear panel marked TX A TX B CHASSIS GND RX A RX B for connecting transmit and receive wires and the cable shield if available TX connectors at the local unit must be connected to RX connectors at the opposite unit MAIN CHANNEL 0000000000 BRE GRRE 0 Lal CH 1 7 CH 2 8 CH 3 9 iue CH 4 10 CH 5 11 CH 6 12 ITO gt 2 Figure 3 3 Rear Panel Table 3 1 Sub Channel Connector Pin Assignment 24 EIA Pin RS 232C No 2 14 3 16 4 19 5 13 6 21 8 12 9 10 Signal Name Description Protective Ground Chassis ground May be Signal Ground Transmit Data
14. ol signals end to end or else the full twelve channels can be used to transmit full duplex data end to end The Local Mux 6 comes with a 4 wire terminal block for transmission over two twisted pairs Multiplexing is implemented using an over sampling technique Each of the twelve channels is sampled at 78 6 kbps Table 2 1 summarizes Local Mux 6 performance NOTE Whenever possible if the number of channels is less than or equal to 6 we recommend that you operate the Local Mux 6 in the six channel mode which results in less distortion Table 2 1 Performance in Various Modes of Operation No of Max Electrical Distortion Sub channels Data Rate Kbps 2 3 Applications The Local Mux 6 is used mainly for point to point configurations where distances of up to several kilometers are involved A typical application is demonstrated in Figure 2 1 where a cluster of terminals is connected to a host computer through a single link Different configurations are available using the 4 wire transmission media The maximum data rate in a point to point configuration is 19 2 kbps for 12 data subchannels 6 data subchannels or 6 data and 6 control subchannels Local Mux 6 Local Mux 6 Async Computer Figure 2 1 Typical Point to Point Installation For installations involving clusters of terminals distributed in several locations Loc
15. ps back data from the remote receiver to the remote transmitter thus checking local digital circuitry Both local and remote analog interfaces Main channel link Remote digital receiver section This test is performed by pressing the RLB push button on the front panel If both local and remote units operate properly the yellow TEST indicators should be lit at both units and all other indicators should be OFF NOTE When either the local or the remote loopback test is performed the following signals at the remote unit sub channels are set to OFF negative voltage condition Received Data Circuit 104 Clear to Send Circuit 106 Receive Line Signal Detector Circuit 109 4 5 Fault Isolation and Troubleshooting The symptoms and corresponding procedures listed in Table 4 3 enable the user to identify isolate and correct faults in accordance with the knowledgeable tools and replacement parts available WARNING These service instructions are for use by qualified personnel only To avoid electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so Table 4 3 Fault Isolation and Troubleshooting Action All front panel indicators are OFF a Check that power is supplied to the unit b Check the fuse inside the AC receptacle on the rear panel and replace it with a new one c Replace unit The fault is probably in the unit s power
16. st to Send RTS 4 4 Clear to Send CTS 5 5 Data Set Ready DSR 6 6 Received Line Signal Detector 8 8 Signal Ground 7 7 Secondary TD 14 14 Secondary RD 16 16 Figure 3 5 DTR to DSR End to End Control Signal Local Mux 6 Sub Channel Connector Channel Doubler Protective Ground 1 1 Transmitted Data TD 2 2 Received Data RD 3 3 Request to Send RTS 4 4 Clear to Send CTS E P Data Set Ready DSR 8 8 Received Line Signal Detector 7 7 Signal Ground 14 14 Secondary TD 16 16 Secondary RD Figure 3 6 RTS to DCD End to End Control Signal Special Cable 1 4Sooonrcoma Special Cable 2 N 0 4 Operating Instructions 4 1 General This chapter covers A list of controls and indicators together with their functions An operating procedure covering turning on the power operating instructions and turning off the power Information on strapping A unit system test procedure for use by the operator and technician Installation procedures given in Chapter 3 must be completed and checked before operating the Local Mux 6 4 2 Controls and Indicators Tables 4 1 and 4 2 list the function of the Local Mux 6 indicators and switches The Local Mux 6 front panel is shown in Figure 4 1 SYNC LOSS TU LLH FLA gK AAAA LEER ERR n Hee mne soc RU B ER na 0 d uu SER MWK SOE kxx FERREE
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