Patton electronics 1004A Bedienungsanleitung

USER

MANUAL

SALES OFFICE

(301) 975-1000

TECHNICAL SUPPORT

(301) 975-1007

http://www.patton.com

Part# 07M1004A-C

Doc# 047031UC

Revised 4/15/97

MODEL 1004A

High Speed, Multipoint

Short Range Modem

Dear Valued Customer,

Thank you for purchasing Patton Electronics products! We do appreciate

your business. I trust that you find this user manual helpful.

We manufacture one of the widest selections of data communications

products in the world including CSU/DSU's, network termination units,

powered and self-powered short range modems, fiber optic modems, interface

converters, baluns, electronic data switches, data-line surge protectors,

multiplexers, transceivers, hubs, print servers and much more. We produce

these products at our Gaithersburg, MD, USA, facility, and can custom

manufacture products for your unique needs.

We would like to hear from you. Please contact us in any of the following

ways to tell us how you like this product and how we can meet your product

needs today and in the future.

Web: http://www.patton.com

Sales E-mail: [email protected]

Support E-mail: [email protected]

Phone - Sales (301) 975-1000

Phone - Support (301) 975-1007

Fax: (301) 869-9293

Mail: Patton Electronics Company

7622 Rickenbacker Drive

Gaithersburg, MD 20879 USA

We are committed to a quality product at a quality price. Patton

Electronics is BABT and ISO 9001 certified. We meet and exceed the highest

standards in the industry (CE, UL, etc.).

It is our business to serve you. If you are not satisfied with any aspect of

this product or the service provided from Patton Electronics or its distributors,

please let us know.

Thank you.

Burton A.Patton

Vice President

P.S. Please tell us where you purchased this product.

CERTIFIED

An ISO-9001

Certified Company

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 1004A 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 1004A 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 1004A 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

1004A 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

Support.

1.3 SERVICE

All warranty and non-warranty 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 Service: (301) 975-1007, http://www.patton.com;

[email protected].

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

Model 1004A. 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

• Operates asynchronously, point to point or multipoint,

over 2 or 4 wires

• Up to 50 multipoint device drops in a polling environment

• Data rates to 115.2 Kbps

• Passes transmit & receive data, one control signal each direction

• No AC power or batteries are required

• Variable high/low impedance settings

• Able to operate with or without “echo”

• Carrier can be set as “constantly on” or “controlled by RTS”

• Compact size ( 2.66” x 2.10” x 0.73”)

• Twisted pair connection via strain relief, RJ-11 or RJ-45

• Silicon Avalanche Diode surge protection

2.2 DESCRIPTION

The Model 1004A High Speed, Multipoint Short Range Modem

provides exceptional versatility in a compact package. Requiring no AC

power or batteries for operation, the Model 1004A supports

asynchronous RS-232 data rates to 115.2 Kbps over one or two

unconditioned twisted pair. Distances up to 15.0 miles are attainable at

lower data rates (1.2 Kbps, 19 AWG twisted pair).

The Model 1004A can handle up to 50 terminal drops in a

multipoint polling environment. For RS-485 and serial printer

applications requiring hardware handshaking, the Model 1004A passes

one control signal in each direction. The Model 1004A may be

configured for high or low impedance operation, carrier may be set to

“constantly on” or “controlled by RTS”, and the unit can operate with or

without “echo”. RTS/CTS delay may be set for “no delay” or 8 mS.

Options for twisted pair connection include terminal blocks with

strain relief, RJ-11, RJ-45 and dual modular connectors for daisy

chaining. Silicon Avalanche Diodes provide 600 watts per wire of

protection against harmful data line transient surges.

3.0 CONFIGURATION

The Model 1004A is configured using an eight position DIP switch

and a DCE/DTE switch. Figure 1 (below) shows the location of the

DCE/DTE switch (externally accessible) on the PC board, as well as

the power supply daughterboard and terminal block.

Figure 2 (below) shows the location of the eight position DIP switch

on the underside of the Model 1004A PC board. Figure 3 (opposite

page) shows the orientation of the eight position DIP switch, with

respect to ON/OFF positions.

+RCV- G -XMT+

DCE/DTE

Switch

Terminal

Block

Figure 1. Top view of Model 1004A board, showing DCE/DTE switch.

12345678

DIP Switch

Figure 2. Bottom view of Model 1004A board, showing (internal) DIP switch.

3.1 SETTING THE DCE/DTE SWITCH

For your convenience, the Model 1004A has an externally

accessible DCE/DTE switch. If the device connected to the Model

1004A is a modem or multiplexer (or is wired like one), set the switch to

“DTE”. This setting causes the Model 1004A to behave like Data

Terminal Equipment and transmit data on pin 2. If the device

connected to the Model 1004A is a PC, terminal or host computer (or is

wired like one), set the switch to “DCE”. This setting causes the Model

1004A to behave like Data Communications Equipment and transmit

data on pin 3.

3.2 DIP SWITCH CONFIGURATION

The eight switches on switch set S1 (see Figure 3, above)

configure the Model 1004A for echo mode, carrier control method,

RTS/CTS delay, “transmit off” impedance, receive impedance, and 2-

wire/4-wire operation. These switches are located

internally

on the

Model 1004A's PC board. To access switch set S1, use a small flat

blade screwdriver to pop open the Model 1004A's case as shown in

Figure 4, below.

3.3 DIP SWITCH SETTINGS

All possible settings for the Model 1004A’s configuration switches

are presented in the table below. Following the table is a detailed

description of each switch function. If you have additional questions,

contact Technical Support at (301) 975-1000.

*Note: Switches S1-1 & S1-2 should be switched simultaneously.

Switches S1-7 & S1-8 should also be switched simultaneously.

S1-1 and S1-2: “Transmit Off” Impedance

Switches S1-1 and S1-2 are set together to determine whether the

receiving device “sees” the impedance of the Model 1004A’s transmitter

as being “high” or “intermediate” when the transmitter is turned off. The

“intermediate” setting is useful in half-duplex environments where the

receiving device does not respond well to the “high” setting.

S1-1 S1-2 Setting

On On Intermediate Impedance

Off Off High Impedance

S1-3: RTS/CTS Delay

The setting for switch S1-3 determines the amount of delay

between the time the Model 1004A “sees” RTS and when it sends CTS.

Note: RTS/CTS Delay setting should be based upon transmission

timing.

S1-3 Setting

On 8 mSec

Off no delay

S1-4: Echo Mode

S1 SUMMARY TABLE

Position Function Factory Default

S1-1* “Transmit Off” Impedance Off

S1-2* “Transmit Off” Impedance Off

S1-3 RTS/CTS Delay On 8 msec

S1-4 “ECHO” Mode Off Echo Off

S1-5 Carrier Control Off Constantly On

S1-6 Receive Impedance On 120 Ohm

S1-7* 2-Wire/4-Wire Off

S1-8* 2-Wire/4-Wire Off

High Z

4-Wire

}

Figure 4. Opening the Model 1004A's plastic case with a small screwdriver

Figure 3. Close-up of DIP switch showing “ON” and “OFF” positions

12345678

OFF

3.4 CONFIGURATION SWITCH APPLICATIONS

The switch settings

generally

needed to configure the Model

1004A for various applications are shown in the table below. Note: Do

not change switch settings until you have

carefully

read Section 3.3.

The setting for switch S1-4 determines whether the Model 1004A

echoes data back to the transmitting device (half-duplex mode only).

S1-4 Setting

On Echo On

Off Echo Off

S1-5: Carrier Control Method

The setting for switch S1-5 determines whether the carrier is

“Constantly On” or “Controlled by RTS”. This setting allows for

operation in switched carrier, multipoint and/or hardware handshaking

applications.

S1-5 Setting

On Controlled by RTS

Off Constantly On

S1-6: Receive Impedance

The setting for switch S1-6 selects the impedance of the input

receiver. You may select either a “low” impedance of 120 Ohms or a

“high” impedance of 16 kOhms. By selecting the proper impedance for

each drop, there may be up to 50 receivers in one application.

S1-6 Setting

On Low (120 Ohm)

Off High (16 kOhm typical)

S1-7 and S1-8: 2-Wire/4-Wire Modes

Switches S1-7 and S1-8 are set together to determine whether the

Model 1004A is in 2-wire or 4-wire operating mode. Note: 2-wire mode

is half-duplex only.

S1-7 S1-8 Setting

On On 2-wire mode

Off Off 4-wire mode

7 8

S1-1: “Xmt Off” Imp. OFF OFF OFF OFF OFF

S1-2: “Xmt Off” Imp. OFF OFF OFF OFF OFF

S1-3: RTS/CTS Delay ON ON ON OFF ON

S1-4: Echo OFF OFF OFF OFF OFF

S1-5: Carrier Control OFF ON ON Master-OFF ON

Slaves-ON

S1-6: Rcv Impedance ON ON ON Master - ON

Slaves - OFF

Last Slave - ON

S1-7: 2-wire/4-wire OFF OFF ON OFF ON

S1-8: 2-wire/4-wire OFF OFF ON OFF ON

TYPICAL MODEL 1004A APPLICATIONS

Point-to-Point

Switch

Settings Multi-point

4W 2W 4W 2W4W HDX

4.0 INSTALLATION

Once the Model 1004A is properly configured, it is ready to

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

the Model 1004A to the twisted pair and RS-232 interfaces, and how to

operate the Model 1004A.

4.1 TWISTED PAIR CONNECTION

The Model 1004A supports point-to-point or multipoint

communication over one or two twisted pair. There are two essential

requirements for installing the Model 1004A:

1. These units work in

pairs.

Therefore, you must have one Model

1004A at each end of a one or two twisted pair interface. In

multipoint environments, there must be one Model 1004A at the

RS-232 host and one at each RS-232 terminal.

2. To function properly, the Model 1004A needs one or two twisted

pair of metallic wire. These pairs must be

unconditioned

dry

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

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

circuits that run through signal equalization equipment, are

not

acceptable

For your convenience, the Model 1004A is available with several

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

with strain relief and dual modular jacks (for multipoint daisy-chaining).

4.1.1 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS

If your application requires you to connect one or two pairs of bare

wires to the Model 1004A, you will need to open the case to access the

terminal blocks. The following instructions 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 the wires won't pull loose.

1. You should already have the case open for the configuration

procedure. If not, see Section 3.2.

2. Strip the outer insulation from the twisted pair(s) about one inch

from the end.

3. Strip the insulation on each of the twisted pair wires about .25”.

4. In a two pair circuit, connect

one pair

of wires to XMT+ and

XMT- (transmit positive and negative) on the terminal block, making

careful note of which color is positive and which color is negative.

5. Connect the

other pair

of wires to RCV+ and RCV- (receive

positive and negative) on the terminal block, again making careful note

of which color is positive and which color is negative.

Ultimately, you will want to construct a two pair crossover cable that

makes a connection with the two Model 1004As as shown below.

6. In a single pair circuit, use

only the transmit (XMT) pair

shown below:

7. 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 1004A.

9 10

XMT+--------------------------------------------------RCV+

XMT----------------------------------------------------RCV-

G ---------------------- G

RCV+--------------------------------------------------XMT+

RCV----------------------------------------------------XMT-

To Shield (Optional) }One Pair

}One Pair

XMT+--------------------------------------------------XMT+

XMT----------------------------------------------------XMT-

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

assembly should resemble the diagram below:

9. 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.

+RCV- G -XMT+

10. Insert the strain relief assembly and wire into the slot in the

bottom half of the modem case. Set it into the recess in the case.

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

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

12. 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.

11 12

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

The RJ-11 and RJ-45 connectors on the Model 1004A’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

When connecting two Model 1004A’s, it is necessary to use a

crossover cable. The diagrams below show how a crossover cable

should be constructed for the following environments: 4-wire RJ-11,

4-wire RJ-45, 2-wire RJ-11 or 2-wire RJ-45.

RJ-11 Cable (4-Wire)

SIGNAL PIN# PIN# SIGNAL

GND†1-----------------------6 GND†

RCV- 2-----------------------4 XMT-

XMT+ 3-----------------------5 RCV+

XMT- 4-----------------------2 RCV-

RCV+ 5-----------------------3 XMT+

GND†6-----------------------1 GND†

†Connection to ground is optional

RJ-45 Cable (4-Wire)

SIGNAL PIN# PIN# SIGNAL

GND†2-----------------------7 GND†

RCV- 3-----------------------5 XMT-

XMT+ 4-----------------------6 RCV+

XMT- 5-----------------------3 RCV-

RCV+ 6-----------------------4 XMT+

GND†7-----------------------2 GND†

RJ-11 Cable (2-Wire)

SIGNAL PIN# PIN# SIGNAL

XMT+ 3-----------------------3 XMT+

XMT- 4-----------------------4 XMT-

RJ-45 Cable (2-Wire)

SIGNAL PIN# PIN# SIGNAL

XMT+ 4-----------------------4 XMT+

XMT- 5-----------------------5 XMT-

†Connection to ground is optional

4.2 WIRING FOR MULTIPOINT CIRCUITS

The Model 1004A supports multi-point applications using either a

star or daisy chain topology. Both topologies require special wiring, as

well as specific DIP switch settings for master and slave units. Note:

Refer to Section 3.2.2 for multipoint DIP switch settings.

4.2.1 STAR TOPOLOGY

Using a star topology, you may connect several Model 1004As

together in a master/slave arrangement. Maximum distance between

the units will vary based upon the number of drops, data rate, wire

gauge, etc. Call Technical Support for specific distance estimates.

13 14

Figure 5 (below) shows how to wire the two-pair cables properly for

a Model 1004A star topology. Note that the ground connection is not

needed.

4.2.2 DAISY CHAIN TOPOLOGY

Using a daisy chain topology, you may connect several Model

1004As together in a master/slave arrangement. Maximum distance

between the units will vary based upon the number of drops, data rate,

wire gauge, etc. Call Technical Support for specific distance estimates.

Figure 6 (below) shows how to wire the two-pair cables properly for

a Model 1004A daisy chain topology. Note that the ground connection

is not needed.

Optional Connection: Dual Modular Jacks

To facilitate daisy chaining, the Model 1004A is available in a

“DRJ11” (dual RJ-11) or “DRJ45” (dual RJ-45) version. These units

have two specially wired modular jacks for twisted pair connection.

With the dual modular units, you won't need to build cumbersome

“Y” cables for your daisy chain application. Simply use a crossover

cable to go between the host and the first slave (see Section 4.1.2 for

crossover cable wiring instructions), and straight through cables

between the slaves.

4.3 CONNECTION TO THE RS-232 INTERFACE

Once you have properly configured the Model 1004A and

connected the twisted pair wires correctly, simply plug the Model 1004A

directly into the DB-25 port of the RS-232 device. Remember to insert

and tighten the two captive connector screws.

(Note: If you must use a cable to connect the Model 1004A to the

RS-232 device, make sure it is a

straight through

cable of the shortest

possible length—we recommend 6 feet or less).

4.4 OPERATING THE MODEL 1004A

Once the Model 1004A is properly 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 and RS-485

interfaces are passed straight through. Additionally, one hardware flow

control signal is passed

in each direction

15 16

HOST FIRST SLAVE SECOND SLAVE

XMT+ RCV+ RCV+

XMT- RCV- RCV-

RCV+ XMT+ XMT+

RCV- XMT- XMT-

Figure 5. Star wiring for Model 1004A host and slaves

HOST FIRST SLAVE OTHER SLAVE(S)

XMT+---------------------RCV+-----------------------RCV+

XMT- ---------------------RCV- -----------------------RCV-

RCV+---------------------XMT+-----------------------XMT+

RCV- ---------------------XMT- -----------------------XMT-

Figure 6. Daisy chain wiring for Model 1004A host and slaves

APPENDIX B

PATTON MODEL 1004A RS-232 PIN CONFIGURATIONS

Patton Electronics Company

APPENDIX A

PATTON MODEL 1004 SPECIFICATIONS

Transmission Format: Asynchronous

Data Rate: Up to 115,200 bps

Range: Up to 9 miles

Serial Interface: DB-25, male or female (DCE/DTE

switchable)

Transmit Line: 2, 4 wire unconditioned twisted pair

Transmit Mode: 4-wire, full or half duplex; 2-wire half duplex

Control Signals: DSR turns “ON” immediately after the

terminal raises DTR; DCD turns “ON” after

recognizing the receive signal from the line;

CTS turns “ON” after the terminal raises

RTS.

RTS/CTS Delay: 8 mSec or “no delay”

Carrier: The carrier is switch selected either

continuous operation or switched operation,

controlled by RTS

Surge Protection: 600W power dissipation at 1 mS

Power: Draws operating power from RS-232 data

and control signals; no AC power or

batteries required.

Temperature: 0 to 50º C

Humidity: 5 to 95%, non-condensing

Size: 2.66” x 2.10” x 0.73”

17 18

1- (FG) Frame Ground

2- (TD) Transmit Data To 1004A

3- (RD) Receive Data From 1004A

4- (RTS) Request to Send To 1004A

5- (CTS) Clear to Send From 1004A

6- (DSR) Data Set Ready From 1004A

7- (SG) Signal Ground

8- (DCD) Data Carrier Detect From 1004A

To 1004A Data Term. Ready (DTR) - 20

DIRECTION “DCE” SETTING DIRECTION

1- (FG) Frame Ground

2- (TD) Transmit Data From 1004A

3- (RD) Receive Data To 1004A

4- (RTS) Request to Send From 1004A

5- (CTS) Clear to Send To 1004A

6- (DSR) Data Set Ready To 1004A

7- (SG) Signal Ground

8- (DCD) Data Carrier Detect To 1004A

From 1004A Data Term. Ready (DTR) - 20

DIRECTION “DTE” SETTING DIRECTION

Data Rate

(kbps)

115.2 3.5 2.6 1.4 0.9

38.4 5.0 2.9 2.2 1.5

9.6 7.1 4.6 3.5 2.8

1.2 9.0 6.5 5.0 3.9

Model 1004A Distance Table (miles)

Wire Gauge

19 22 24 26

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