Patton electronics 1020 Manual de usuario

USER

MANUAL

MODEL 1020

and 1020S

Synchronous Short

Range Modem with

Transformer Isolation

SALES OFFICE

(301) 975-1000

TECHNICAL SUPPORT

(301) 975-1007

http://www.patton.com

Part #07M1020-C

Doc. #041011UC

Revised 4/20/98

CERTIFIED

An ISO-9001

Certified Company

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 1020 components to be

free from defects, and will—at our option—repair or replace the product

should it fail within one year from the first date of shipment.

This warranty is limited to defects in workmanship or materials, and

does not cover customer damage, abuse or unauthorized modification.

If this product fails or does not perform as warranted, your sole

recourse shall be repair or replacement as described above. Under no

condition shall Patton Electronics be liable for any damages incurred

by the use of this product. These damages include, but are not limited

to, the following: lost profits, lost savings and incidental or

consequential damages arising from the use of or inability to use this

product. Patton Electronics specifically disclaims all other warranties,

expressed or implied, and the installation or use of this product shall be

deemed an acceptance of these terms by the user.

1.1 RADIO AND TV INTERFERENCE

The Model 1020 generates and uses 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 and

television reception. The Model 1020 has been tested and found to

comply with the limits for a Class A computing device in accordance

with the specifications in Subpart J of Part 15 of FCC rules, which are

designed to provide reasonable protection from such interference in a

commercial installation. However, there is no guarantee that

interference will not occur in a particular installation. If the Model 1020

does cause interference to radio or television reception, which can be

determined by disconnecting the RS-232 interface, the user is

encouraged to try to correct the interference by one or more of the

following measures: moving the computing equipment away from the

receiver, re-orienting the receiving antenna and/or plugging the

receiving equipment into a different AC outlet (such that the computing

equipment and receiver are on different branches).

1.2 CE NOTICE

The CE symbol on your Patton Electronics equipment indicates

that it is in compliance with the Electromagnetic Compatibility (EMC)

directive and the Low Voltage Directive (LVD) of the Union European

(EU). A Certificate of Compliance is available by contacting Technical

Services.

1.3 SERVICE

All warranty and nonwarranty repairs must be returned freight

prepaid and insured to Patton Electronics. All returns must have a

Return Materials Authorization number on the outside of the shipping

container. This number may be obtained from Patton Electronics

Technical Services at:

telephone: (301) 975-1007

email: [email protected]

web address: http://www.patton.com

NOTE: Packages received without an RMA number will not be

accepted.

Patton Electronics' technical staff is also available to answer any

questions that might arise concerning the installation or use of your

Patton Model 1020. Technical Service hours: 8AM to 5PM EST,

Monday through Friday.

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

• Supports point-to-point data rates from 1.2 to 19.2 Kbps

• Internal, crystal controlled clock

• Transformer isolation guards against ground looping

• Range to 11 miles

• Full duplex operation

• Custom VLSI chip with separate filter for each data rate

• No AC power or batteries required

• Miniature size

• High speed surge protection (Model 1020S only)

2.2 DESCRIPTION

The Patton Electronics Model 1020 miniature, synchronous short

range modem uses the latest in VLSI technology to combine high-

quality data transmission with compact size. The Model 1020 does not

require any AC power or batteries to operate, and communicates up to

11 miles in point-to-point environments.

Supporting full duplex transmission over two twisted pairs, the

Model 1020 has a crystal controlled internal clock. Data rates are

switch selectable from 1200 to 19,200 bps. The Model 1020’s custom

VLSI chip uses a separate filter for each data rate, rather than a single

“compromise” filter. Transformer isolation allows the Model 1020 to

operate between buildings without data disruption due to ground

potential differences.

The Model 1020S is a surge protected version of the Model 1020,

incorporating Silicon Avalanche Diodes that provide 600 watts of

protection per wire.

3.0 CONFIGURATION

The Model 1020 provides four configuration switches which allow

selection of RTS/CTS delay and data rates. This section describes

switch locations and explains all possible switch configurations.

3.1 SWITCH LOCATIONS

For your convenience, all configuration switches are located on a

SIP (single in-line package) mounted on the PC board. Figure 1 shows

the location of the SIP with respect to other PC board components. For

instructions on opening the Model 1020 case, see Section 4.1.2.

Figure 2 shows the orientation of the configuration switches,

including the ON/OFF position.

PATTO N

PE068

XXXX

1234

OFF

Figure 1. Model 1020 PC board showing switches

Figure 2. Close-up of configuration switches

Control

Switches

Terminal Block Patton

VLSI chip

Isolating

Transformers

3.2 SWITCH SETTINGS

All possible settings for the Model 1020’s configuration switches

are presented in the summary table and descriptions below. If you

have additional questions regarding configuration, contact Patton

Technical Support at (301) 975-1007.

Switch 1: RTS/CTS Delay

After request to send (RTS) is raised by the host terminal, the

1020/1020S raises CTS after a slight delay in order to give the remote

terminal time to receive an incoming signal. Depending on the type of

environment, either a 7mS or 53mS delay can be selected.

Switch 1 Setting

On 7 mS

Off 53 mS

Switches 2, 3 and 4: Data Rate

Switches 2 thru 4 are set in combination to allow the Model 1020 to

be used at data rates from 1.2 Kbps up to 19.2 Kbps.

Switch 2 Switch 3 Switch 4 Setting

On On On 1.2 Kbps

On On Off 2.4 Kbps

On Off On 4.8 Kbps

Off On On 7.2 Kbps

On Off Off 9.6 Kbps

Off On Off 14.4 Kbps

Off Off On 19.2 Kbps

Off Off Off 19.2 Kbps

4.0 INSTALLATION

Once the Model 1020 is properly configured, it is ready to connect

to your system. This section tells you how to properly connect the

Model 1020 to the twisted pair and RS-232 interfaces, and how to

operate the Model 1020.

4.1 CONNECTION TO THE TWISTED PAIR INTERFACE

The Model 1020 supports data-only communication between two

RS-232 devices at distances to 11 miles and data rates to 19.2 Kbps.

There are two essential requirements for installing the Model 1020:

1. These units work in

pairs

. Therefore, you must have one Model

1020 at each end of a two twisted pair interface.

2. To function properly, the Model 1020 needs two twisted pairs of

metallic wire. These pairs must be

unconditioned

, dry, metallic

wire, between 19 and 26 AWG (the higher number gauges may

limit distance somewhat). Standard dial-up telephone circuits, or

leased circuits that run through signal equalization equipment, are

not acceptable

For your convenience, the Model 1020 is available with three

different twisted pair interfaces: RJ-11 jack, RJ-45 jack and terminal

blocks with strain relief.

4.1.1 TWISTED PAIR CONNECTION USING RJ-11 OR RJ-45

The RJ-11 and RJ-45 connectors on the Model 1020’s twisted pair

interface are pre-wired for a standard TELCO wiring environment. The

signal/pin relationships are shown below:

RJ-11 SIGNAL RJ-45 SIGNAL

1...................GND†1 .................N/C

2...................RCV‡2 .................GND†

3...................XMT 3 .................RCV‡

4...................XMT 4 .................XMT

5...................RCV 5 .................XMT

6...................GND 6 .................RCV

7 .................GND

8 .................N/C

†Connection to ground is optional

‡The Model 1020 is not polarity sensitive

SWITCH SUMMARY TABLE

Position Function Factory Default

Switch 1 RTS/CTS delay On 7 mSec delay

Switch 2 Data Rate On

Switch 3 Data Rate Off

Switch 4 Data Rate Off

9,600 bps

}

1. Open the unit by gently inserting a screw driver 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.

Once the unit has been opened, you will be able to see the

terminal blocks located at the rear of the PC board.

2. Strip the outer insulation from the twisted pairs about one inch

from the end.

3. Strip back the insulation on each of the 2 twisted pair wires

about .25”.

When connecting two Model 1020s it is necessary to use a

“crossover” cable. The diagram below shows how a crossover cable

should be constructed for an environment where both Model 1020s use

a 6-wire RJ-11 connector. Similar logic should be followed when using

RJ-45 connectors or a combination of the two.

SIGNAL PIN# COLOR COLOR PIN# SIGNAL

GND†1 Blue◊.................White 6 GND

RCV‡2 Yellow ..............Red 4 XMT

XMT 3 Green...............Black 5 RCV

XMT 4 Red..................Yellow 2 RCV

RCV 5 Black................Green 3 XMT

GND 6 White ...............Blue 1 GND

†Connection to ground is optional

◊Standard color codes—yours may be different

‡The Model 1020 is not sensitive to polarity

Standard AT&T color codes

4.1.2 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS

If your application requires you to connect two pairs of bare wires

to the Model 1020, you will need to open the case to access the

terminal blocks. The instructions on the following pages will tell you

how to open the case, connect the bare wires to the terminal blocks,

and fasten the strain relief collar in place so that the wires won’t pull

loose.

7 8

1 - Blue

2 - Yellow

3 - Green

4 - Red

5 - Black

6 - White

1 - Blue

2 - Orange

3 - Black

4 - Red

5 - Green

6 - Yellow

7 - Brown

8 - Slate

4. Connect

one pair

of wires to the two XMT (transmit) poles on

the terminal block, making careful note of which colors you

use. The Model 1020 is not polarity sensitive, so either wire

may connect to either pole.

5. Connect the

other pair

of wires to the two RCV (receive) poles

on the terminal block, making careful note of which colors you

use. The Model 1020 is not polarity sensitive, so either wire

may connect to either pole.

Ultimately, you will want to construct a two pair crossover

cable that makes a connection with the two Model 1020s as

shown below:

6. If there is a shield around the telephone cable, it may be

connected to “G” on the terminal block. To avoid ground

loops, we recommend connecting the shield at the computer

end only. A ground wire is

not necessary

for proper operation

of the Model 1020.

7. When you finish connecting the wires to the terminal block, the

assembly should resemble the diagram below:

RCV G XMT

8. 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. If your cable diameter is too small

or too large for our strain relief, please contact our technical

support. We have strain relief assemblies to accommodate

most cable diameters.

9. Insert the strain relief assembly with the wire going through it

into the slot in the bottom half of the modem case and set it

into the recess in the case.

RCV G XMT

9 10

XMT RCV

RCV XMT

To Shield (Optional) }One Pair

}One Pair

APPENDIX A

SPECIFICATIONS

Transmission Format: Synchronous, full duplex

Transmission Line: Two unconditioned twisted pair 19 - 26 AWG

Range: (See table below)

Interfaces: EIA RS-232, CCITT V.24

Data Rates: 1200 - 19.2 Kbps

Isolation: Minimum 1500 V RMS via custom transformers

Surge Protection: 600W Surge Protection (10x1000µs waveform)

(Model 1020S)

Control Signals: CTS turns on 7 or 53 mS (switch selectable)

after the terminal raises RTS; DSR and DCD are constantly on

Connectors: DB-25 male or female on RS-232 side;

RJ-11, RJ-45 or terminal block with strain relief on line side

Power Supply: None required; uses power from EIA data and

control signals

Temperature Range: 0-60°C (32-140°F)

Altitude: 0-15,000 feet

Humidity: Up to 95% non-condensing

Weight: 2 oz.

Dimensions: 2.66” x 2.10” x 0.73”

10. BEND the top half of the case as necessary to place it over the

strain relief assembly. Do not snap the case together yet.

11. Insert one captive screw through a saddle washer and then

insert the entire piece through the hole in the DB-25 end of the

case. Snap that side of the case closed. Repeat the process

for the other side. This completes cable installation.

4.2 CONNECTION TO THE RS-232 INTERFACE

Once you have connected the twisted pair wires correctly, simply

plug the Model 1020 directly into the DB-25 port of the RS-232 device.

After doing so, remember to insert and tighten the two captive

connector screws.

(Note: If you must use a cable to connect the Model 1020 to the

RS-232 device, make sure it is a

straight through

cable of the shortest

possible length—we recommend 6 feet or less).

4.3 OPERATING THE MODEL 1020

Once the Model 1020 is properly configured and installed, it should

operate transparently—as if it were a standard cable connection.

Operating power is derived from the RS-232 data and control signals;

there is no “ON/OFF” switch. All data signals from the RS-232 interface

are passed straight through. All control signals from the RS-232

interface are looped back.

NOTE: If your system requires

hardware

flow control, you will

need the Patton Model 1030 or Model 1070 Short Range Modem.

Call Patton Customer Service at 301-975-1007 for more

information.

11 12

Data

Rate Wire Gauge

19 24 26

19,200 7.5 3.5 2.5

9,600 10.0 3.5 2.5

4,800 10.0 7.0 4.0

2,400 10.0 8.5 5.0

1,200 11.0 8.5 6.0

Model 1020 Distance Table (miles)

APPENDIX B

RS-232 PIN CONFIGURATIONS

Patton Electronics Company

1- (FG) Frame Ground

2- (TD) Transmit Data To Model 1020

3- (RD) Receive Data From Model 1020

4- (RTS) Request to Send To Model 1020

5- (CTS) Clear to Send From Model 1020

6- (DSR) Data Set Ready From Model 1020

7- (SG) Signal Ground

8- (DCD) Data Carrier Detect From Model 1020

To Model 1020 Data Term. Ready (DTR) - 20

DIRECTION “DCE” STANDARD SETTING DIRECTION

To Model 1020 Receiver Timing - 17

To Model 1020 Transmitter Timing - 15

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