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HIGH SPEED SHM-B ASYNC AND CARD

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 présent appareil numérique n’émet pas de bruits
radioélectriques dépassant les limites applicables aux
appareils numériques de la classe A prescrites dans le
Règlement sur le brouillage radioélectrique publié par
Industrie Canada.

TRADEMARKS USED IN THIS MANUAL

UL is a registered trademark of Underwriters
Laboratories Incorporated.

Any other trademarks mentioned in this manual are acknowledged to be the property

of the trademark owners.

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Содержание High Speed SHM-B Async

Страница 1: ...l free in the U S 24 hours 7 A M Monday to midnight Friday 877 877 BBOX FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mail order Black Box Corporation 1000...

Страница 2: ...for a Class A computing device in accordance with the specifi cations in Subpart J of Part 15 of FCC rules which are designed to provide reasonable protection against such interference when the equipm...

Страница 3: ...l 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 R glement sur le brouillage radio lectrique publi par Indu...

Страница 4: ...er Page 1 Specifications 1 2 Introduction 4 3 Installation 5 3 1 Four Wire Connections 5 3 2 EIA 232 Connection 7 3 3 Jumper Settings 9 3 4 Flow Control 9 3 5 ME800 Compatibility 11 4 Operation 12 5 R...

Страница 5: ...e than 15 pF ft Shielded twisted pair cable will reduce the distance to one third of the table value because of the additional capacitance contributed by the cable s shielding Actual distances may var...

Страница 6: ...provided by a front panel switch Analog loopback on the 4 wire loop and digital loopback on equipment interface EIA 232 Status Indication Two light emitting diodes LEDs indicate the status of the tran...

Страница 7: ...95 max noncondensing Power ME802A primary 115 VAC 10 60 Hz ME802AE primary 230 VAC 10 50 60 Hz Both secondary 17 VAC 5 watts Size ME802A ME802AE 1 5 H x 4 4 W x 4 1 D 3 8 x 11 2 x 10 4 cm ME802C 0 9...

Страница 8: ...vailable in both a standalone version ME802A or ME802AE and a rackmount card version ME802C The High Speed SHM B Async is designed to operate over a 4 wire metallic circuit The best performance is obt...

Страница 9: ...per connections between two High Speed SHM B Async units NOTE Transmit TX on one modem is wired to Receive RX on the other modem Transmit TX is wired to Receive RX 1 Insert the wires into the terminal...

Страница 10: ...SPEED SHM B ASYNC AND CARD Figure 1 High Speed SHM B Async board locations of jumpers and 4 screw terminal block J1 RS 232 CONNECTOR DCE LOOPBACK SWITCH RX RX TX TX DTE XW1A XW1B A B C W2 A B C W4 A...

Страница 11: ...he High Speed SHM B Async to your computer or terminal with a standard EIA 232 cable and DB25 connectors Refer to your equipment s installation manual if you need information on the exact EIA 232 sign...

Страница 12: ...The table below shows the pin connections on the High Speed SHM B Async Table 1 EIA 232 Pin Connections ME802 ME802 Pin Signal configured configured No Name as DCE as DTE 1 Protective Ground earth gr...

Страница 13: ...If you use a crossover cable to connect the High Speed SHM B Async to your equipment then the setting for W1 will be identical to your equipment s setting Refer to your equipment s manual for informa...

Страница 14: ...other end of the line X ON X OFF MODE JUMPER W2 IN THE B C DISABLED POSITION If X ON X OFF characters are used for handshaking control rather than hardware logic levels move jumper W2 to the B C or Di...

Страница 15: ...positions allow the High Speed SHM B Async to operate at maximum speeds and distances When jumpers W3 and W4 are set in the B C positions the output signal of the High Speed SHM B Async is reduced to...

Страница 16: ...terminal is connected to the High Speed SHM B Async typing characters on the keyboard should result in the same characters appearing on the CRT screen If no characters appear check your EIA 232 connec...

Страница 17: ...s to normal mode Data transmission between the two modems should now be possible If you have problems communicating between the two High Speed SHM B Async units refer to Chapter 6 to help diagnose the...

Страница 18: ...panel of your High Speed SHM B Async indicate the status of the High Speed SHM B Async transmitter and receiver respectively The TD LED will light when data is transmitted out of the RS 232 port on th...

Страница 19: ...es on the front of the panel then pulling on opposite side plungers to loosen and remove the panel Locate the four 10 32 Phillips head screws that were shipped with the SHM B Rack Use these screws to...

Страница 20: ...lying force to fully seat the board otherwise you may damage the board and power pins When all boards have been wired and plugged into the rack plug the wall transformer into its power source You shou...

Страница 21: ...thing you have already done to correct the situation SYMPTOM No data transfer in one or both directions to from or to and from the High Speed SHM B Async 1 Monitor the TD LED on the sending end modem...

Страница 22: ...rnally enable the driver circuit on the High Speed SHM B Async unit If data transfer now occurs either an EIA 232 control signal supplied to the High Speed SHM B Async by the attached RS 232 device wa...

Страница 23: ...1 and Figure 2 2 Check word structure and speed settings on your computing equipment for consistency 3 Wire the High Speed SHM B Async units back to back eliminating the twisted pair see if you still...

Страница 24: ...rent four wire circuit or rewire the existing circuit 3 Check the path of your four wire circuit for potential sources of interference fluorescent lighting electrical motors etc Such sources of electr...

Страница 25: ...y cable for your particular installation 5 Your AC power source may be the culprit Check your AC power at the wall socket and confirm that it is within the range given in Chapter 1 6 Check the setting...

Страница 26: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 1995 Black Box Corporation All rights reserved...

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