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2.0  GENERAL INFORMATION

Thank you for your purchase of this Patton Electronics product.

This product has been thoroughly inspected and tested and is
warranted for One Year parts and labor.  If any questions or problems
arise during installation or use of this product, please do not hesitate to
contact Patton Electronics Technical Support at (301) 975-1007.

2.1  FEATURES

•  Extends parallel communication to 2000 feet

•  Requires no AC power or batteries

•  Operates over a single twisted pair

•  Allows devices to communicate in “real time”

•  Can be configured for BUSY or ACKNOWLEDGE 

flow control methods

•  Compatible with most printer sharing devices

•  Transmits DC power over the line to compensate for low power

parallel printer interfaces

•  DB-25 or Centronics parallel connections

•  RJ-11, RJ-45 or terminal block line connections

2.2  DESCRIPTION

The Patton Electronics Model 1225 ParaLink

TM

parallel short

range modem allows a PC and a parallel output device (printer, sharing
switch, etc.) to communicate at distances to 2000 feet over a single
unconditioned twisted pair.  Supporting parallel data rates to 5 Kbytes
per second (serial rates to 40 Kbps), the Model 1225 derives all
necessary operating power from the parallel interface—no AC power or
batteries are required.

The Model 1225 always works in pairs:  A 

transmitter unit is

plugged into the PC parallel port and a 

receiver unit is plugged into the

output device parallel port.  The connection between them is serial, and
functions at speeds high enough to allow “real time” parallel
communication between the two parallel devices.  The Model 1225 has
two unique features that allow it to operate in a wide variety of parallel
applications:  First, the Model 1225 transmitter is able to send DC
power down the line to the receiver in order to compensate for low
power parallel printer interfaces.  Second, the Model 1225 can be
configured for either BUSY or ACKNOWLEDGE flow control methods.

The Model 1225 receiver is available with either a DB-25 or

Centronics parallel interface (transmitter has DB-25 only).  Line
connection options are RJ-11, RJ-45 or terminal block with strain relief.

3

3.0  CONFIGURATION

The Model 1225 is designed to be easy to use.  There are no

internal jumpers or DIP switches to set, so there is no need to open the
case to configure the unit (you may need to open the case for wire
connection—refer to Section 4.0).  

The only configuration necessary for operation is proper setting of

the external BUSY / ACKNOWLEDGE switch.  The diagram below
shows the location of the BUSY / ACKNOWLEDGE switch on the PC
board, as well as the location of the terminal block. 

3.1  SETTING THE BUSY / ACKNOWLEDGE SWITCH

For your convenience, the Model 1225 has an externally

accessible BUSY / ACKNOWLEDGE switch (see diagram below).  Set
the switch on both transmitter and receiver as follows:

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
reeiver.  This should achieve good results in most applications.

3.  If you experience loss of information or other problems with both

switches set to ACKNOWLEDGE, set both switches to BUSY.

4

G   S

Terminal

Block

BUSY/

ACKNOWLEDGE

Switch

Ack

Busy

Ack

Busy

Содержание ParaLink 1225

Страница 1: ...DEL 1225 ParaLinkTM Parallel Short Range Modem SALES OFFICE 301 975 1000 TECHNICAL SUPPORT 301 975 1007 http www patton com Part 07M1225 B Doc 104011UB Revised 9 12 97 C E R T I F I E D An ISO 9001 Certified Company ...

Страница 2: ...lation However there is no guarantee that interference will not occur in a particular installation If the Model 1225 does cause interference to radio or television reception which can be determined by disconnecting the Model 1225 from both parallel interfaces the user is encouraged to try to correct the interference by one or more of the following measures moving the computing equipment away from ...

Страница 3: ...llow real time parallel communication between the two parallel devices The Model 1225 has two unique features that allow it to operate in a wide variety of parallel applications First the Model 1225 transmitter is able to send DC power down the line to the receiver in order to compensate for low power parallel printer interfaces Second the Model 1225 can be configured for either BUSY or ACKNOWLEDG...

Страница 4: ...u how to open the case connect the bare wires and fasten the strain relief collar in place 1 Open the unit by gently inserting a screwdriver between the DB 25 connector and the lip of the plastic case see below You don t have to worry about breaking the plastic but be careful not to bend the D sub connector After you have opened the unit s case you will find the terminal block mounted at the rear ...

Страница 5: ...d 4 GND RJ 45 JACKS SIGNAL PIN COLOR COLOR PIN SIGNAL DATA 4 Red Red 4 DATA GND 5 Green Green 5 GND Standard AT T color codes yours may be different 4 Place the 2 halves of the strain relief assembly on either side of the telephone wire and press together very lightly Slide the assembly so that it is about 2 inches from the terminal posts and press together firmly 5 Insert the strain relief assemb...

Страница 6: ...ss 4 3 OPERATING THE MODEL 1225 Once the transmitter and receiver have been connected to each other and to their corresponding parallel input and output devices you are ready to operate the units Make sure that the BUSY ACK switch on both units are placed on the same setting Otherwise the units should function transparently just like a cable There is no ON OFF switch If your Model 1225 s are not o...

Страница 7: ...mon Return Ground 24 Common Return Ground 23 Common Return Ground 22 Common Return Ground 21 Common Return Ground 20 Common Return Ground 19 Common Return Ground 18 Printer Error Fault Active LOW DIRECTION RECEIVER CENTRONICS DIRECTION 36 35 34 33 Printer Fault Active Low 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 5 Volts Printer 17 Chassis Ground Common 16 Logic Ground Common 15 14 13 Select Ac...

Страница 8: ...ENDIX C continued PATTON MODEL 1225 BLOCK DIAGRAM Centronics Receiver 13 14 APPENDIX C continued PATTON MODEL 1225 BLOCK DIAGRAM DB25 Receiver Copyright 1997 Patton Electronics Company All Rights Reserved ...

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