Patton electronics 1025 Manual de usuario

USER

MANUAL

MODEL 1025

and 1025S

Synchronous Short

Range Modem with

Clocking Options

SALES OFFICE

(301) 975-1000

TECHNICAL SUPPORT

(301) 975-1007

http://www.patton.com

Part #07M1025-C

Doc. #041012UC

Revised 4/20/98

CERTIFIED

An ISO-9001

Certified Company

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 1025 components to be

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

uct 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 modifi-

cation. 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 consequen-

tial 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 1025 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 tele-

vision reception. The Model 1025 has been tested and found to com-

ply 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 interfer-

ence will not occur in a particular installation. If the Model 1025 does

cause interference to radio or television reception, which can be deter-

mined by disconnecting the RS-232 interface, the user is encouraged

to try to correct the interference by one or more of the following mea-

sures: moving the computing equipment away from the receiver, re-

orienting the receiving antenna and/or plugging the receiving equip-

ment 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 pre-

paid and insured to Patton Electronics. All returns must have a Return

Materials Authorization number on the outside of the shipping contain-

er. 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 1025. Technical Service hours: 8AM to 5PM EST,

Monday through Friday.

3.0 CONFIGURATION

The Model 1025 provides six configuration switches which allow

selection of clocking method, RTS/CTS delay and data rate. This sec-

tion describes switch locations and explains all possible switch config-

urations.

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 compo-

nents. For instructions on opening the Model 1025 case, see Section

4.1.2.

Figure 2 shows the orientation of the configuration switches,

including ON/OFF position.

2.0 GENERAL INFORMATION

Thank you for your purchase of this Patton Electronics product.

This product has been thoroughly inspected and tested and is warrant-

ed for One Year parts and labor. If any questions or problems arise

during installation or use of this product, please do not hesitate to con-

tact Patton Electronics Technical Support at (301) 975-1007.

2.1 FEATURES

• Supports data rates to 19.2 Kbps

• Internal, external or receive loopback clocking

• Transformer isolation guards against ground looping

• Range to 11 miles

• Operates full duplex over two unconditioned twisted pair

• Customized VLSI chip with separate filter for each data rate

• No AC power or batteries required

• Miniature size

• Silicon Avalanche Diode surge protection (Model 1025S)

2.2 DESCRIPTION

The Patton Electronics Model 1025 miniature, synchronous

short range modem uses the latest in VLSI technology to combine

high-quality data transmission with compact size. The Model 1025

does not require any AC power or batteries to operate, and communi-

cates up to 11 miles in point-to-point environments. For maximum flex-

ibility, the Model 1025 supports three clocking options: internal, exter-

nal or receive loopback.

Providing full duplex transmission over two twisted pair, the Model

1025 accommodates seven switch selectable data rates from 1200 to

19,200 bps. The Model 1025’s custom VLSI chip uses a separate filter

for each data rate, rather than a single “compromise” filter.

Transformer isolation allows the Model 1025 to operate between build-

ings without data disruption due to ground potential differences.

The Model 1025S is a surge protected version of the Model 1025,

incorporating Silicon Avalanche Diodes that provide 600 watts of pro-

tection per wire.

PATTO N

PE068

XXXX

Control

Switches

Terminal

Block

Patton

VLSI chip

Isolating

Transformers

3 4

123456

OFF

Figure 2. Close-up of configuration switches

Figure 1. Model 1025 PC board showing switches

3.2 SWITCH SETTINGS

All possible settings for the Model 1025’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.

Switches 1 and 2: Transmit Clock

Switches 1 and 2 are used together to specify the clocking

method. The Model 1025 can provide an internal clock (Pin 15),

receive an external clock (from Pin 24), or loopback a received clock.

Switch 1 Switch 2 Setting

On On External Clock

On Off External Clock

Off On Internal Clock (Default)

Off Off Receive Loopback

Switch 3: RTS/CTS Delay

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

Model 1025 raises CTS after a delay in order to give the remote termi-

nal time to receive an incoming signal. Depending on the type of envi-

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

Switch 3 Setting

On 7 mS (Default)

Off 53 mS

Switches 4, 5 and 6: Data Rate

Switches 4 thru 6 are set in combination to allow the Model 1025

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

Switch 4 Switch 5 Switch 6 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 (Default)

Off On Off 14.4 Kbps

Off Off On 19.2 Kbps

Off Off Off 19.2 Kbps

SWITCH SUMMARY TABLE

Position Function Factory Default

Switch 1 Transmit Clock Off

Switch 2 Transmit Clock On

Switch 3 RTS/CTS delay On 7 mSec delay

Switch 4 Data Rate On

Switch 5 Data Rate Off

Switch 6 Data Rate Off

Internal

Clock

9,600 bps

}

When connecting two Model 1025s, 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 1025s

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 1025 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 1025, you will need to open the case to access the termi-

nal blocks. The instructions on the following pages will tell you how to

open the case, connect the bare wires to the terminal blocks, and fas-

ten the strain relief collar in place so that the wires won’t pull loose.

4.0 INSTALLATION

Once the Model 1025 is properly configured, it is ready to connect

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

Model 1025 to the twisted pair and RS-232 interfaces, and how to

operate the Model 1025.

4.1 CONNECTION TO THE TWISTED PAIR INTERFACE

The Model 1025 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 1025:

1. These units work in

pairs

. Therefore, you must have one Model

1025 at each end of a two twisted pair interface.

2. To function properly, the Model 1025 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 1025 is available with three dif-

ferent 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 1025’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 1025 is not polarity sensitive

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

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.

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”.

4. Connect

one pair

of wires to the two XMT (transmit) poles on

the terminal block. The Model 1025 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. The Model 1025 is not polarity sensi-

tive, 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 1025s as

shown below:

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

nected 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 1025.

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

the assembly should resemble the diagram below:

RCV G XMT

9 10

XMT RCV

RCV XMT

To Shield (Optional) }One Pair

}One Pair

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 and wire going into the slot in

the bottom half of the modem case and set it into the recess

in the case.

RCV G XMT

10. Place the top half of the case as necessary to slide it over the

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

11. Insert one captive screw through a saddle washer. 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 1025 directly into the DB-25 port of the RS-232 device.

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

tor screws.

4.2.1 CONNECTION TO A “DTE” DEVICE

The Model 1025 is wired as a DCE, and therefore wants to plug

into a DTE such as a terminal, PC or host. Because the Model 1025 is

interface powered, a direct connection to the RS-232 DTE port is most

desirable. If you must use a cable to connect the Model 1025 to the

DTE port, make sure it is a

straight through

cable of the shortest possi-

ble length—we recommend 6 feet or less.

11 12

APPENDIX A

SPECIFICATIONS

Transmission Format: Synchronous, full duplex

Transmission Line: Two unconditioned twisted pair 19 - 26 AWG

Clocking: Internal, external or receive loopback

Range: (See table below)

Interfaces: EIA RS-232, CCITT V.24

Data Rates: 1.2 - 19.2 Kbps

Isolation: Minimum 1500 V RMS via custom transformers

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

(Model 1025S)

Control Signals: CTS turns on 8 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: No external power 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

Dimensions: 2.66” x 2.10” x 0.73”

Weight: 2 oz.

4.2.2 CONNECTION TO A “DCE” DEVICE

Since the Model 1025 is wired as a DCE, you cannot connect it

directly to another DCE such as a modem, multiplexer or printer. If you

need to connect the Model 1025 to another DCE device, you must use

null modem cable

wired according to diagram below. We recom-

mend that the cable is as short as possible, preferably 6 feet or less.

Connection to Model 1025†Connection to DCE Device

DB-25 Pin No. DB-25 Pin No.

1......................................................1

2......................................................3

3......................................................2

4......................................................8

8......................................................4

6....................................................20

20......................................................6

17....................................................24

24....................................................17

7......................................................7

†Note: When connecting to another DCE device, the Model 1025

should be configured for “external clock” (see Section 3.2).

4.3 OPERATING THE MODEL 1025

Once the Model 1025 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 inter-

face 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.

13 14

Data

Rate

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 1025 Distance Table (miles)

Wire Gauge

19 24 26

APPENDIX B

RS-232 PIN CONFIGURATIONS

Patton Electronics Company

1- (FG) Frame Ground

2- (TD) Transmit Data To Model 1025

3- (RD) Receive Data From Model 1025

4- (RTS) Request to Send To Model 1025

5- (CTS) Clear to Send From Model 1025

6- (DSR) Data Set Ready From Model 1025

7- (SG) Signal Ground

8- (DCD) Data Carrier Detect From Model 1025

To Model 1025 Data Term. Ready (DTR) - 20

DIRECTION “DCE” STANDARD SETTING DIRECTION

To Model 1025 Transmitting Timing (LXC) - 24

From Model 1025 Transmitting Timing - 15

From Model 1025 Receiver Timing - 17

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