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23

LOCAL MUX-6

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.
If 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

.

Содержание Local Mux-6

Страница 1: ...E 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 inf...

Страница 2: ...mmercial 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 neces...

Страница 3: ...to el ctrico debe ser montado a la pared o al techo s lo como sea recomendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo el ctrico m s all a lo descrito en las ins...

Страница 4: ...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 17 Cuidado debe...

Страница 5: ...6 LOCAL MUX 6 TRADEMARKS All applied for and registered trademarks are the property of their respective owners...

Страница 6: ...lation 14 3 1 Site Preparation 14 3 2 Setup 14 3 3 Installation in 19 Racks 15 3 3 1 General 15 3 3 2 Installation of Unit 15 3 4 Electrical Installation 16 3 4 1 AC Power 16 3 4 2 Sub Channels 16 3 4...

Страница 7: ...umber 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 t...

Страница 8: ...dicator 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 Sw...

Страница 9: ...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...

Страница 10: ...t 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 sin...

Страница 11: ...sters of terminals distributed in several locations Local 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 shorti...

Страница 12: ...ber 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 Figure 2 2 Typical Ring Installation 4 TERM 4 TERM 4 TERM T R 9...

Страница 13: ...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 any other applications place the strap between the center pin and t...

Страница 14: ...wo 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 f...

Страница 15: ...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 informa...

Страница 16: ...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 Figure 3 3 Rea...

Страница 17: ...Send A positive level to the Local Mux 6 when data transmission is desired 106 CB 5 13 Clear to Send A positive level from the Local Mux 6 if data transmission is possible 107 CC 6 21 Data Set Ready...

Страница 18: ...18 25 23 1 2 3 4 5 6 8 15 17 20 24 7 1 2 3 4 5 6 8 15 17 20 24 7 Local Mux 6 Sub Channel Connector Channel Doubler Port A Port B Not used Signal Ground Not used Protective Ground Transmitted Data TD...

Страница 19: ...or Channel Doubler Special Cable 1 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...

Страница 20: ...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 oper...

Страница 21: ...ote 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...

Страница 22: ...nstrument 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 li...

Страница 23: ...og 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 loops back data from th...

Страница 24: ...eck 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 supply circuits Red LOCAL SYNC LOSS is ON a Perform LLB Y...

Страница 25: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 1997 Black Box Corporation All rights reserved...

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