Place a receiving device up to 4 miles from the sending
Contents
1. 724 746 5500 blackbox com Page 9 Chapter 3 Installation 3 Installation Before you begin make sure all equipment including the converters are not powered on Set the 4 position DIP switch as appropriate for local control signal enable and cable distance N Set the slide switch for either DCE to connect to a PC or DTE to connect to a modem 3 Connect the two short haul modems with twisted pair cable making sure to connect TX and TX on the local unit to RX and RX respectively on the remote unit and vice versa You can use either the RJ 11 connector or the 4 wire terminal block 4 Once the modems are connected together connect DB9 cables to equipment and power up the converters ul Next power up your equipment For testing purposes a loopback function has been incorporated into the short haul modem Placing the local unit in loopback enables the local unit to be tested without the line and enables the remote unit to test the line Placing the remote unit in loopback allows the local unit to test the line Keep in mind that the unit in loopback sees a cable of zero length while the other unit sees twice the cable length This may affect the DIP switch settings and the baud rate at which the test will be successful Table 3 1 Four position screw terminal connector Position Function 1 TX 2 TX 3 RX 4 RX Page 10 724 746 5500 blackbox com Chapter 32. Installation Table 3 2 RJ 11 connector Position Function 1 No connection 2 RX 3 TX 4 TX 5 RX 6 No connection Table 3 3 DB9 RS 232 connector Pin Signal DCE Interface Function DTE Interface Function S1 A S1 B 1 Data Carrier Output Input Detect 2 Received Data Output Input 3 Transmitted Input Output Data 4 Data Terminal Input Output Ready 5 Signal Ground Ground Ground 6 Data Set Ready Output Pulled High Input Pulled High 7 Request To Send Input connected to pin 8 Output connected to pin 8 8 Clear To Send Output connected to pin 7 Input connected to pin 7 9 Ring Indicator Open Open DCE Data Communications Equipment can connect to a PC DTE Data Terminal Equipment configured the same as a PC NOTES 1 When configured as DCE Data Carrier Detect will be active when the remote unit is driving the line 724 746 5500 blackbox com Page 11 Chapter 3 Installation NOTES continued 2 When configured as DCE Data Terminal Ready and Request to Send signals may be used to disable the line driver see 53 The remote unit will sense this condition and its Data Carrier Detect signal will become negative 3 When configured as DTE Data Terminal Ready will be active when the remote unit is driving the line 4 When configured as DTE Data Carr
3. o contra ellos poniendo particular atenci n a los contactos y recept culos donde salen del aparato El equipo el ctrico debe ser limpiado nicamente de acuerdo a las recomendaciones del fabricante En caso de existir una antena externa deber ser localizada lejos de las lineas de energia El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo Page 4 724 746 5500 blackbox com 17 18 NOM Statement Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilaci n Servicio por personal calificado deber ser provisto cuando El cable de poder o el contacto ha sido da ado u Objectos han ca do o l quido ha sido derramado dentro del aparato o El aparato ha sido expuesto a la lluvia o El aparato parece no operar normalmente o muestra un cambio en su desempe o o El aparato ha sido tirado o su cubierta ha sido da ada 724 746 5500 blackbox com Page 5 Table of Contents Table of Contents E PA 7 A Eo E 8 A ee actese E N a EE 10 A Troubleshooting oooooninnicnicninnnnni cnica nana 15 Page 6 724 746 5500 blackbox com 1 Specifications Chapter 1 Specifications Technical Specifications Approvals Power supply UL CSA Data Flow Control X ON X OFF Data Format Asynchronous full duplex Interconnect Two pair twisted pair cable Speed Up to
4. 115 200 bps at up to 4000 feet 1250 m Up to 57 600 bps at up to 1 mile Up to 9600 bps at up to 4 miles User Controls 1 4 position DIP switch 1 DCE DTE slide switch 1 push button switch Interface EIA RS 232 C CCITT V 24 V 28 ISO 2110 Connectors 1 DB9 female 1 4 position terminal block 1 RJ 11 1 DC power jack Indicators TX This dual Red Green LED will be green when the Receive Data is low and red when the Receive Data is high RX This LED can be used to verify proper polarity of the interconnecting lines it should be green when no data is being transmitted Red indicates improper line polarity Environment Temperature Tolerance Operating 23 to 86 F 5 to 30 C Storage 23 to 140 F 5 to 60 C Humidity O to 95 relative humidity non condensing Power Wallmount power supply 9 VDC 500 mA 115 VAC UL CSA Dimensions 1 5 H x 5 2 W x 5 2 D 3 8 x 13 2 x 13 2 cm Weight 1 4 lb 0 6 kg including power supply 724 746 5500 blackbox com Page 7 Chapter 2 Introduction 2 Introduction These short haul modems enable you to place a receiving device up to four miles from the sending device They are switch selectable for either DCE or DTE application eliminating the need for special cables and preventing confusion during installation The short haul modems are connected with twisted pair cable using a 4 position terminal bloc
5. ME800A R4 lt gt BLACK BOX NETWORK SERVICES Me SSBLACK BOX www blackbox com NORMAL gem LOOPBACK SHORT HAUL MODEM 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 Information 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com Trademarks Used in this Manual Trademarks Used in this Manual Black Box and the Double Diamond logo are registered trademarks of BB Technologies Inc UL Is a registered trademark of Underwriters Laboratories Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners Page 2 724 746 5500 blackbox com FCC and IC RFI Statements NOM Statement 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 B of Part 15 of FCC rules which are designed to provide reasonable protection against such interference when th
6. ance Note 2 Short less than 1000 ft Reserved NOTES 1 When hardware control is enabled both control input signals must be high for transmission to be enabled 2 The long and short line distance switches control the current output of the line driver These switches should be OFF for distances less than 1000 feet and should be ON for distances greater than 1000 feet 724 746 5500 blackbox com Page 13 Chapter 3 Installation Table 3 7 Indicators Indicator Function TX The Green LED is on when the Receive Data is low and the Red LED is on when the Receive Data is high RX This LED can be used to verify proper polarity of the interconnecting lines it should be green when no data is being transmitted Red indicates improper line polarity Page 14 724 746 5500 blackbox com Chapter 4 Troubleshooting 4 Troubleshooting If the units fail to operate check the following before calling for technical support 1 Are the units powered on Check to see if the power supplies are plugged into a working AC outlet 2 Check to see if the interconnect wire is connected properly TX to RX TX to RX at both ends 3 Check that switch S3 is set for the proper cable length 4 If hardware control is enabled DTR and RTS must be high to enable data transmission to the remote unit ul Check that the loopback switch S2 is in the Normal position 724 746 5500 b
7. e 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 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 la 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 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 724 746 5500 blackbox com Page 3 NOM Statement 5 10 14 12 13 14 15 16 El aparato el ctrico no deber s
8. er usado cerca del agua por ejemplo cerca de la tina de ba o 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 lo descrito 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 Precauci n debe ser tomada de tal manera que la tierra fisica y la polarizaci n del equipo no sea eliminada Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre
9. ier Detect and Clear to Send signals may be used to disable the line driver see S3 The remote unit will sense this condition and its Data Terminal Ready signal will become inactive Switches S1 2 position slide switch DTE DCE S2 2 position push button switch loopback Push button will be in out positio S3 4 p n for loopback osition DIP switch option switches Table 3 4 S1 switch Position Function See description of RS 232 DB9 connector A Configure as DCE for connection to PC serial port B Configure as DTE to simulate PC serial port output NOTE Table 3 5 S2 switch Position Function See Figure 3 2 OUT Normal operation IN Loopback When switch S2 is in the loopback position the output of the local unit is fed back to its input and the line is looped back so the remote unit can test the line integrity The remote unit will actually see twice the distance of the line This should be taken into consideration when determining the maximum baud rate at which the loopback test will be successful The local loopback path is compensated for zero length cable Page 12 724 746 5500 blackbox com Chapter 3 Installation SHM 1 in Loop Back Made SHM 2 in Normal Mode Figure 3 1 Loopback function Table 3 6 S3 switch UP is OFF DOWN is ON Switch Position Hardware Control Enable Note 1 Disabled Line Dist
10. k or RJ 11 The units are optically isolated to provide protection from differences in ground potential between the units The units provide line status Data Carrier Detect when DCE is selected and Data Terminal Ready when DTE is selected to indicate that the remote unit is online and ready to communicate Two dual RED GREEN indicators on the front panel indicate the status of receive and transmit circuitry as well as proper polarity of twisted pair connections lt gt BLACK BOX www blackbox c TX RX i f N DCE DTE NORMAL A mm LOOPBACK SHORT HAUL MODEM Figure 2 2 Back panel Page 8 724 746 5500 blackbox com Chapter 2 Introduction Table 2 1 Components Number Component Description 1 Pushbutton Press this button for Loopback operation The button is not pressed in Normal operation 2 2 TX LEDs This dual Red Green LED will be green when the Received Data is low and red when the Received Data is high 3 2 RX LEDs This LED can be used to verify proper polarity of the interconnecting lines it should be green when no data is being transmitted Red indicates improper line polarity 4 DCE DTE DIP Slide left to configure the modem as a DCE switch Slide right to configure the modem as a DTE 1 DB9 connector Links to RS 232 interface 6 4 position DIP See Table 3 6 switch S3 Power connector 9 VDC 500 mA power connector 8 RJ 11 connector 6 position connector
11. lackbox com Page 15 Black Box Tech Support FREE Live 24 7 Tech support the way it should be Great tech support is just 30 seconds away at 724 746 5500 or blackbox com lt BLACK BOX About Black Box Black Box provides an extensive range of networking and infrastructure products You ll find everything from cabinets and racks and power and surge protection products to media converters and Ethernet switches all supported by free live 24 7 Tech support available in 30 seconds or less Copyright 2013 Black Box Corporation All rights reserved Black Box and the Double Diamond logo are registered trademarks of BB Technologies Inc Any third party trademarks appearing in this manual are acknowledged to be the property of their respective owners ME800A R4 version 1 724 746 5500 blackbox com
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