USER
Part# 07M1010A-A
Doc# 039011UA
Revised 11/8/95
MANUAL
MODEL 1010A
Miniature, High Speed
Short Range Modem
with Transformer Isolation
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
APPENDIX D
BLOCK DIAGRAM
1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model 1010A 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 1010A 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 1010A 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
1010A 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 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 at (301) 975-1007.
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 1010A. Technical Service hours: 8AM to 5PM EST, Monday
through Friday.
112
2.0 GENERAL INFORMATION
1- (FG) Frame Ground
2- (TD) Transmit Data
3- (RD) Receive Data
4- (RTS) Request to Send
5- (CTS) Clear to Send
6- (DSR) Data Set Ready
7- (SG) Signal Ground
8- (DCD) Data Carrier Detect
Data Term Ready (DTR) - 20
RS-232C INTERFACE (DCE)
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
• Transformer coupled for DC isolation between modems
• Immune to ground loops caused by ground potential differences
• Supports asynchronous RS-232 communication over 2 twisted pair
• Supports data rates to 115.2 Kbps, distances to 8.5 miles
• Loops back all handshaking signals on the RS-232 interface
• Externally accessible DCE/DTE switch makes configuration easy
• Very thin case (.75") for closely spaced computer ports
• No AC power or batteries required—draws all necessary operating
power from the RS-232 interface
• Provides surge protection of 600 Watts per wire
RS-232C PIN CONFIGURATIONS
APPENDIX C
2.2 DESCRIPTION
The Patton Model 1010A miniature, high speed, transformer
isolated short range modem lets two asynchronous RS-232 devices
communicate between buildings, over two twisted pair. Supporting
asynchronous data rates to 115.2 Kbps, the Model 1010A derives the
necessary power for operation from the data and control voltages on
the RS-232 interface. DC transformer isolation on the line side gives
the Model 1010A immunity to ground loops that would otherwise
hamper between-building communications.
An external DCE/DTE switch lets you connect to the serial port of
either a computer/terminal (DTE) or a modem (DCE) without using a
crossover cable. The Model 1010A is available with three 4 wire
interface options: RJ-11, RJ-45 or terminal blocks with strain relief.
The Model 1010A also incorporates high speed avalanche diodes
that intercept data line transient surges and shunt them safely to
chassis ground. With surge handling capacity of 600W per wire at
1mS, the 1010A can protect itself and connected equipment from
nearby lightning strikes and other surges of electromagnetic radiation.
2
11
3.0 CONFIGURATION
DCE DTE
DCE/DTE
Switch
Surge
Suppressors
DCE DTE
Terminal
Block
Transformers
APPENDIX B
SPECIFICATIONS
Transmission Format: Asynchronous, full duplex
Transmission Line: Two unconditioned twisted pair 19 - 26 AWG
Range: (See table below)
Interfaces: EIA RS-232, CCITT V.24
Data Rates: 50 - 115.2 Kbps
Isolation: Minimum 1500 V RMS via custom transformers
Surge Protection: 600W power dissipation at 1 mS;
component response time of 1 pS; installed response time of 2 µs
Dimensions: 2.66" x 2.10" x 0.73"
Factory Switch Setting: DCE (transmits from RS-232 on pin 3)
Control Signals: DSR and DCD follow DTR from the terminal
(DTE); CTS follows RTS from the terminal (DTE)
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.
10
Data
Rate
115,200 0.6 0.45 0.3
57,600 2.0 1.5 1.0
38,400 2.4 1.8 1.2
19,200 2.6 2.0 1.2
9,600 4.0 2.5 1.6
4,800 5.0 3.5 2.2
2,400 6.8 4.7 3.2
1,200 8.5 5.7 3.8
Model 1010A Distance Table (miles)
Wire Gauge
19 24 26
The Model 1010A 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 DCE/DTE switch.
The figure below shows the location of the DCE/DTE switch on the
PC board, as well as the location of the terminal block and surge
suppressors.
3.1 SETTING THE DTE/DCE SWITCH
For your convenience, the Model 1010A has an externally
accessible DCE/DTE switch (see figure below). If the device connected
to the Model 1010A is a modem or multiplexer (or is wired like one), set
the switch to "DTE". This setting causes the Model 1010A to behave
like Data Terminal Equipment and transmit data on pin 2.
If the device connected to the Model 1010A is a PC, terminal or
host computer (or is wired like one), set the switch to "DCE". This
setting causes the Model 1010A to behave like Data Communications
Equipment and transmit data on pin 3.
3
4.0 INSTALLATION
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
4
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, then insert
the captive screw with the washer on it 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 configured the Model 1010A for DTE or DCE and
connected the twisted pair wires correctly, all that remains is to plug the
1010A 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 1010A 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 1010A
Once the Model 1010A 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 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 1012 or Model 1060 Short Range Modem. Call Patton
Customer Service at 301-975-1007 for more information).
+RCV- G -XMT+
+RCV- G -XMT+
+RCV- G -XMT+
Once you have properly configured the DTE/DCE switch, you are
ready to connect the Model 1010A to your system. This section tells
you how to properly connect the Model 1010A to the twisted pair and
RS-232 interfaces, and how to operate the Model 1010A.
4.1 CONNECTION TO THE TWISTED PAIR INTERFACE
The Model 1010A supports data-only communication between two
RS-232 devices at distances to 8.5 miles and data rates to 115.2 Kbps.
There are two essential requirements for installing the Model 1010A:
1) These units work in
pairs
. Therefore, you must have one Model
1010A at each end of a two twisted pair interface.
2) To function properly, the Model 1010A 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 1010A 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 1010A's twisted pair
interface are pre-wired for a standard TELCO wiring environment. The
signal/pin relationships are shown below:
RJ-1
9
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
†
†
Connection to ground is optional
4.1.2 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS
If your RS-422 application requires you to connect two pairs of
bare wires to the Model 1010A, 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 that the wires won't pull loose.
(continued)
5
1
2
3
4
5
6
1
2
3
4
5
6
7
8
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+
+RCV- G -XMT+
DCE DTE
+RCV- G -XMT+
+RCV- G -XMT+
When connecting two Model 1010As, it is necessary to use a
"cross over" cable. The diagram below shows how a cross over cable
should be constructed for an environment where both Model 1010As
use a 6-wire RJ-11 connector. Similar logic should be followed when
using RJ-45 connectors or a combination of the two.
RJ-1
8
1. Open the unit by gently inserting a screw driver between the DB-25
+RCV- G -XMT+
XMT + RCV+
XMT - RCV G G
RCV - XMT RCV + XMT +
To Shield (Optional)
}
One Pair
}
One Pair
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.
4. Connect
and negative) on the terminal block, making careful note of which color
is positive, and which color is negative.
5. Connect the
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 cross over cable that
makes a connection with the RS-422 device as shown below:
one pair
other pair
of wires to XMT+ and XMT- (transmit positive
of wires to RCV+ and RCV- (receive
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".
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
not necessary
wire is
7. When you finish connecting the wires to the terminal block, the
assembly should resemble the diagram below:
for proper operation of the Model 1010A.
6
7
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