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20

PARALLEL LINE DRIVER

Appendix B: Block Diagrams

Figure B-1. Block Diagram (Transmitter).

PARALLEL

TO

SERIAL

CONVERSION

POWER

SUPPLY

CONTROL

CIRCUITRY

PULSE

WIDTH

MODULATOR

GATED

OSCILLATOR

TRANSFORMER

(TO RECEIVER)

RJ11

CONNECTOR

3

4

+V

STROBE

1

2

DB1

3

DB2

4

DB3

5

DB4

6

DB5

7

DB6

8

DB7

9

DB8

10

ACK

11

BUSY

DATA

1

STROBE

17

SELECT

13

SEL

14

L FEED

16

INI PRN

D
B

2
5

P
A
R
A
L
L
E
L

I

N

T
E

R

F

A
C
E

18

GND

19

GND

20

GND

21

GND

22

GND

23

GND

24

GND

25

GND

Summary of Contents for ME190A

Page 1: ...INE DRIVER R CUSTOMER SUPPORT INFORMATION Order toll 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 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com ...

Page 2: ...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 Thi...

Page 3: ...ente con carritos o pedestales que sean recomendados por el fabricante 7 El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de operación Todo otro servicio deberá ser referido a personal de servicio calificado 9 El aparato eléctric...

Page 4: ... únicamente de acuerdo a las recomendaciones del fabricante 15 En caso de existir una antena externa deberá ser localizada lejos de las lineas de energia 16 El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilación 18 Se...

Page 5: ...IVER TRADEMARKS Centronics is a registered trademark of GENICOM Corporation AT T is a registered trademark of AT T Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners ...

Page 6: ...2 2 Features 7 3 Configuration 8 4 Installation 10 4 1 Connecting the Line Side 10 4 1 1 Terminal Block Connection 10 4 1 2 RJ 11 Line Connection 16 4 2 Connecting to Parallel Hardware 17 4 3 Operating the Parallel Line Driver 17 Appendix A Parallel Pin Configurations 18 Appendix B Block Diagrams 20 ...

Page 7: ... batteries needed Size 2 7 H x 2 1 W x 0 7 D 6 8 x 5 3 x 1 8 cm Weight 1 lb 0 5 kg Parallel Interface ME190A transmitter DB25 male w terminal block ME191A receiver Centronics male w terminal block ME192A transmitter DB25 male w RJ 11 ME193A receiver Centronics male w RJ 11 Range 2000 feet 609 6 m Transmission Half duplex over a single shielded or unshielded twisted pair 19 26 AWG Line Interface RJ...

Page 8: ... all necessary operating power from the parallel interface no AC power or batteries are required The Parallel Line Driver always works in pairs A transmitter unit is plugged into the PC s parallel port and a receiver unit is plugged into the output device s parallel port The connection between them is serial and functions at speeds high enough to allow real time parallel communication between the ...

Page 9: ...here is no need to open the case to configure the unit you may need to open the case for wire connection refer to Chapter 4 The only configuration necessary for operation is proper setting of the external BUSY ACKNOWLEDGE switch Figure 3 1 shows the location of the BUSY ACKNOWLEDGE switch on the PC board as well as the location of the terminal block Busy Ack G S Terminal Block BUSY ACKNOWLEDGE Swi...

Page 10: ...igure 3 2 BUSY ACKNOWLEDGE Switch Busy Ack 1 The switch must be set the same way on both transmitter and receiver 2 Set the switch to Acknowledge on both the transmitter and receiver This should achieve good results in most applications 3 If you experience loss of infor mation or other problems with both switches set to Acknowledge set both switches to Busy ...

Page 11: ... breaking the plastic but be careful not to bend the D sub connector Once you have configured the Parallel Line Driver transmitter and receiver you must connect the system This section will tell you how to connect the transmitter and receiver via twisted pair wire and how to connect the two devices to your system hardware 4 1 Connecting the Line Side Depending upon the type of units you have order...

Page 12: ...rear of the PC board The terminals are labeled S for signal and G for ground 2 Strip the outer insulation from the twisted pairs about one inch from the end Figure 4 2 Stripping the Outer Insulation 3 Strip back the insulation on each of the 2 wires about 1 4 inch Figure 4 3 Stripping the Insulation on the Wires ...

Page 13: ...ground terminal posts then tighten the screws Figure 4 4 Inserting the Two Wire Data Line G S NOTE Make sure the twisted pair cable between the trans mitter and receiver is wired straight through as shown in Figure 4 5 SIGNAL S S SIGNAL GROUND G G GROUND Figure 4 5 Straight Through Wiring ...

Page 14: ...the strain relief assembly on either side of the telephone wire and press together very lightly Slide the assembly so that it is about two inches from the terminal posts and press together firmly Figure 4 6 Putting the Strain Relief Assembly Together G S ...

Page 15: ... bottom half of the modem case Set it into the recess in the case If the telephone wire does not fit into the strain relief assembly call for technical support We can supply you with strain relief collars to fit a wide variety of cable diameters Figure 4 7 Setting the Strain Relief Assembly G S ...

Page 16: ...t snap the case together yet Figure 4 8 Placing the Case over the Strain Relief Assembly 8 Insert one captive screw through a saddle washer and then insert the entire piece through the hole in the DB25 end of the case Snap that side of the case closed Repeat the process for the other side This completes the installation ...

Page 17: ...ugh cabling between the transmitter and receiver as shown below Table 4 1 RJ 11 Jacks Signal Pin Color Color Pin Signal DATA 3 Green1 Green 3 DATA GND 4 Red Red 4 GND 1 Standard AT T color codes yours may be different 1 Blue 2 Yellow 3 Green 4 Red 5 Black 6 White Figure 4 9 Pinout for Straight Through Cabling ...

Page 18: ...male connector designed for direct connection to the Centronics port of a parallel printer NOTE If you cannot plug the receiver directly into the port use a straight through cable of the shortest possible length We recommend 6 feet 1 8 m or less 4 3 Operating the Parallel Line Driver Once the transmitter and receiver have been connected to each other and to their corresponding parallel input and o...

Page 19: ...ata Bit 4 4 Data Bit 3 3 Data Bit 2 2 Data Bit 1 LSB 1 Data Strobe Active LOW Return Ground 25 Return Ground 24 Return Ground 23 Return Ground 22 Return Ground 21 Return Ground 20 Return Ground 19 Return Ground 18 Error Fault Active LOW SOURCE Printer Printer Printer Printer Computer Computer Computer Computer Computer Computer Computer Computer Computer Common Common Common Common Common Common C...

Page 20: ...nter Common Common Printer Printer Printer Printer Computer Computer Computer Computer Computer Computer Computer Computer Computer 18 5 Volts 17 Chassis Ground 16 Logic Ground 15 14 13 Select Active HIGH 12 Paper End Active HIGH 11 Busy Active HIGH 10 Acknowledge Active HIGH 9 Data Bit 8 MSB 8 Data Bit 7 7 Data Bit 6 6 Data Bit 5 5 Data Bit 4 4 Data Bit 3 3 Data Bit 2 2 Data Bit 1 LSB 1 Data Stro...

Page 21: ...PLY CONTROL CIRCUITRY PULSE WIDTH MODULATOR GATED OSCILLATOR TRANSFORMER TO RECEIVER RJ11 CONNECTOR 3 4 V STROBE 1 2 DB1 3 DB2 4 DB3 5 DB4 6 DB5 7 DB6 8 DB7 9 DB8 10 ACK 11 BUSY DATA 1 STROBE 17 SELECT 13 SEL 14 L FEED 16 INI PRN D B 2 5 P A R A L L E L I N T E R F A C E 18 GND 19 GND 20 GND 21 GND 22 GND 23 GND 24 GND 25 GND ...

Page 22: ...RSION POWER SUPPLY CONTROL CIRCUITRY DIFFERENTIAL RECEIVER CONTROL CIRCUITS TRANSFORMER TO TRANSMITTER RJ11 CONNECTOR 3 4 V STROBE 1 2 DB1 3 DB2 4 DB3 5 DB4 6 DB5 7 DB6 8 DB7 9 DB8 10 ACK 11 BUSY 10 ACK 11 BUSY 12 P OUT 13 SEL 18 6V 32 FAULT 16 GND 17 GND C E N T R O N I C S I N T E R F A C E SWITCH ...

Page 23: ...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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