Patton electronics 1004A User Manual

USER
MANUAL

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]
http://www.patton.com

MODEL 1004A

High Speed, Multipoint
Short Range Modem

An ISO-9001

Certified Company

CERTIFIED

Part# 07M1004A-C
Doc# 047031U,
Rev. D
Revised 1/22/08

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

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: [phone], 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

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 [phone].

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

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.

4

DCE/DTE

Switch

Terminal

Block

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

DIP Switch

S1

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

+RCV- G -XMT+

ON

12345678

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 2­wire/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.

5

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

ON

OFF

ON

12345678

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 [phone].

*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

6

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

}

}

S1-4: Echo Mode

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

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.

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.

9

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

as

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.

10

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

11

+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.

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-1

1 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-1

1 Cable (4-Wire)

SIGNAL PIN# PIN# SIGNAL

GND

†

1-----------------------6 GND

†

RCV- 2-----------------------4 XMT­XMT+ 3-----------------------5 RCV+
XMT- 4-----------------------2 RCV­RCV+ 5-----------------------3 XMT+
GND

†

6-----------------------1 GND

†

13

1
2
3
4
5
6
7
8

1
2
3
4
5
6

†

Connection to ground is optional

RJ-45 Cable (4-Wire)

SIGNAL PIN# PIN# SIGNAL

GND

†

2-----------------------7 GND

†

RCV- 3-----------------------5 XMT­XMT+ 4 -----------------------6 RCV+
XMT- 5-----------------------3 RCV­RCV+ 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-W

ire)

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

14

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.

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.

15

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

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

16

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

.

17

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

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.

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

An ISO-9001

Certified Company

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 [phone]

Phone - Support [phone]

Fax: [phone]

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 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:

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