Patton 2002 USER MANUAL

USER
MANUAL

MODEL 2002 Series

RS-232 to TTL
Interface Converter

CERTIFIED

An ISO-9001

Certified Company

Part# 07M2002-A
Doc#

07725U2-001,

Rev. B

Revised 1/23/08

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

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 2002 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 Models 2002 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 2002 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 2002
does cause interference to radio or television reception, which can be
determined by disconnecting the RS-232 or TTL 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.

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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 Support: [phone]; http://www.patton.com; or,

[e-mail].

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
Model 2002. Technical Support hours: 8AM to 5PM EST, Monday

through Friday.

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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

• Bi-directional, asynchronous data conversion between RS-232
and TTL

• Supports data rates to 230 kbps

• Two versions available:

Model 2002FC-MT connects an RS-232 DTE to a TTL DCE
Model 2002FT-MC connects an RS-232 DCE to a TTL DTE

• Passes TD & RD plus five control signals: CD, DTR, DSR, CTS &
RTS

• Data and control signals independently selectable for
inverting/non-inverting

• Interface powered–no AC required

• RS-232 interface is a DB-25 female, TTL interface is a DB-25 male

2.2 DESCRIPTION

The Patton Model 2002 RS-232 to TTL Interface Converter lets

an asynchronous RS-232 device communicate bi-directionally with an
asynchronous TTL device. Supporting data rates up to 230 kbps, the
Patton Model 2002 passes data (TD, RD) plus five control signals (CD,
DTR, DSR, CTS and RTS). In addition, the Patton Model 2002 allows
data and control signals to be independently jumper-selected as
“inverting” or “non-inverting.”

The Patton Model 2002 is available in two versions: DCE-to-DTE

and DTE-to-DCE. The RS-232 interface is presented on a DB-25
female connector, while the TTL interface is presented on a DB-25
male connector. Deriving power from the data and control signals, the
Patton Model 2002 requires no AC power or batteries for operation.

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3.0 CONFIGURATION

The Model 2002 is very easy to use. Most applications require no
configuration. Just plug it in and go! However, some TTL circuitry
requires data and/or control signals to be inverted (opposite) from their
normal conditions. Please read the section below to determine if the
default settings will work for you.

3.1 DEFAULT TTL LOGIC LEVELS

Systems represents data signals by alternating between “mark”
(binary “1”) and space (binary “0”) conditions. TTL (Transistor-Transitor
Logic) circuitry normally a represents a “mark” as a voltage between

2.4 and 5.0 Volts, and a “space” as a voltage between 0.4 and 0.4
Volts. By contrast, TTL control signals (RTS, CTS, DSR, DCD and
DTR) are either “active” (between 0.0 and 0.4 Volts), or “inactive”
(between 2.4 and 5.0 Volts). Table 1, below, summarizes the above
information.

Table 1. Default TTL Signal Levels

Signal Level Data Signals Control Signals

0.0 to 0.4 Volts space active

2.4 - 5.0 Volts mark inactive

Table 1, above, shows the default configuration of the Model 2002.

In most cases no modification is required!!

circuitry requires inverted signals for either the data or control signals,
you must change the settings of one or two jumper switches. In order
to change the jumper settings, you must open the case. Please follow
the instructions below to do so.

However, if your TTL

3.2 OPENING THE CASE

TheJP1 and JP2 jumpers on the Model 2002 are located on the
PC board. To open, insert a small flathead screw driver or similar tool
between the DB-25 female connector and the lip of the case as shown
in Figure 1.

Figure 1: Using a Small Screw Driver to Open the Model 2002 Case

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