MARCH 1997 MX895A MX895AE Local Fiber Mux-6 -6 l Mux Loca LLB SYNC AL LOC RLB LOSS OTE REM TEST ER POW CUSTOMER SUPPORT INFORMATION Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500) FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.
LOCAL FIBER MUX-6 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.
LOCAL FIBER MUX-6 NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura. 3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas. 4. Todas las instrucciones de operación y uso deben ser seguidas. 5.
LOCAL FIBER MUX-6 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización 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 atención a los contactos y receptáculos donde salen del aparato. 14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante. 15.
LOCAL FIBER MUX-6 TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.
LOCAL FIBER MUX-6 Contents Chapter Page 1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 1.1 Sub-Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 1.2 Main Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 1.3 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 2. Introduction . . . . . . . . . . .
LOCAL FIBER MUX-6 1. Specifications 1.1 Sub-Channels Transmission Format—Asynchronous Data Rate—Up to 38.4 kbps (refer to Table 2-1 and 2-3) Distortion—Refer to Table 1-1 Interface—EIA RS-232C/CCITT V.24 Connectors—(6) DB25 female Number of Sub-channels—Up to 12 by attaching a channel doubler to each of the connectors Mode of Operation—Full duplex 1.2 Main Channel Optical Interface (Dual Fiber) Transmission Line—Double optical cable Operating Range—3.2 miles (5 km) Data Rate—2.
LOCAL FIBER MUX-6 1.
LOCAL FIBER MUX-6 Environment Temperature—32 to 122°F (0 to 50°C) Humidity—Up to 90% non-condensing Power Power Requirements—110/115/230 VAC (±10%), 47–63 Hz, 7.5 VA max.
LOCAL FIBER MUX-6 2. Introduction 2.1 General The Local Fiber 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 Fiber 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 Fiber Mux-6 contains six sub-channels that can be expanded to twelve through connection of channel doubler cables.
LOCAL FIBER MUX-6 Table 2-1. Performance in Various Modes of Operation. No. of Subchannels in use Max. Data Rate Distortion (%) Optical 6 19.2 6.25 6 38.4 12.5 12 19.2 12.5 12 38.4 25 2.3 Applications The Local Fiber 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.
LOCAL FIBER MUX-6 Local Fiber Mux-6 Local Fiber Mux-6 Async Computer Figure 2-1. Typical Point-to-Point Installation. For installations involving clusters of terminals distributed in several locations, Local Fiber 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 2-3. Ring Configuration.
LOCAL FIBER MUX-6 4 TERM 1 T 2 WIRE 1 R 4 HOST 12 R T 2 WIRE 2 WIRE 4 TERM 4 TERM R T 5 9 8 12 R 2 WIRE T Figure 2-2. Typical Ring Installation.
LOCAL FIBER MUX-6 3. Installation 3.1 Site Preparation The Local Fiber Mux-6 is installed within 5 feet (1.5 m) of a grounded AC outlet. 3.2 Setup a) Unscrew the two upper-cover screws located at the back of the unit (refer to Figure 3-3). b) Slide the rear drawer out. c) 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.
LOCAL FIBER MUX-6 3.3 Installation in 19" Racks 3.3.1 GENERAL The Local Fiber 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. 3.3.2 INSTALLATION OF A UNIT The rack-adapter components for single-unit installation include two short brackets.
LOCAL FIBER 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 Fiber Mux-6 through a 5 foot (1.5 m) cord terminated by a grounded 3-wire plug. The AC cord is fused at the rear panel 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.
LOCAL FIBER MUX-6 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 are required. Refer to Figure 3-4 for the pinout of the channel doubler.
LOCAL FIBER MUX-6 Table 3-1. Sub-Channel Connector Pin Assignment. CCITT V.24 EIA RS-232C Pin. No. Signal Name Description 101 AA 1 Protective Ground Chassis ground. May be isolated from signal ground. 102 AB 7 Signal Ground Common signal and DC power supply ground. 103 BA 2 (14)* Transmit Data Serial digital data from a terminal or other source into the Local Fiber Mux-6. 104 BB 3 (16) Receive Data Serial digital data output from the Local Fiber Mux-6.
LOCAL FIBER MUX-6 Local Fiber 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 1 2 3 4 5 6 8 15 17 20 24 7 1 2 3 4 5 6 8 15 17 20 24 7 Port A 1 2 3 4 5 6 8 15 17 20 24 7 Port B Secondary TD Secondary RD Secondary RTS Secondary CTS Secondary DSR Secondary RLSD Not used 14 16 19 13 21 12 11 18 25 23 14 16 19 13 21 12 11 18 25 23 1 2 3 4 5 6 8 15 17
LOCAL FIBER MUX-6 Local Fiber Mux-6 Sub-Channel Connector Protective Ground Transmitted Data (TD) Received Data (RD) Request to Send (RTS) Clear to Send (CTS) Data Set Ready (DSR) Received Line Signal Detector Signal Ground Secondary TD Secondary RD 1 2 3 4 5 6 8 7 14 16 Channel Doubler 1 2 3 4 5 6 8 7 14 16 Special Cable 1 1 2 3 4 5 6 8 20 7 Figure 3-5. DTR to DSR End-to-End Control Signal.
LOCAL FIBER MUX-6 4. Operation 4.1 General This chapter covers: • A list of controls and indicators together with their functions. • An operating procedure covering power-on, operating instructions, and power-off. • 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 Fiber Mux-6. 4.
LOCAL FIBER MUX-6 Table 4-1. Indicators. Item Indicator Function 1 Power Green LED lights when power is present. 2 Test Yellow LED lights when either local or remote unit is performing a test. 3 Local Sync Loss Red LED lights when synchronization is lost at the local unit. 4 Remote Sync Loss Red LED lights when synchronization is lost at the remote unit. Table 4-2. Indicators. Item Switch Function 5 LLB When pressed (pushed in) the unit performs local loopback.
LOCAL FIBER MUX-6 4.3 Operating Procedure WARNING When you plug in the Local Fiber Mux-6, 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. The protective action must not be negated by use of an extension cord (power cable) without a protective conductor (grounding).
LOCAL FIBER MUX-6 4.4 System Tests Two system tests are available in the Local Fiber 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 located on the front panel.
LOCAL FIBER MUX-6 4.5 Fault Isolation and Troubleshooting Use Table 4-3 to help you troubleshoot any problems with the Local Fiber Mux-6. 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. Symptom Action All front panel indicators are OFF (a) Check that power is supplied to the unit.
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