Patton 2018 USER MANUAL

USER
MANUAL

MODEL 2018

RS-232 to
Current Loop Converter

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

Part# 07M2018-B
Doc# 07304UB
Revised 3/31/94

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 2018 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 2018 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 2018 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 2018 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 [phone].

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 2018. Technical Service 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 [phone].

2.1 FEATURES

• Full duplex, asynchronous transmission over 4 wires

• Operates actively or passively

• Data rates from 50 to 115,200 bps

• Range to 5 miles on 24 AWG twisted pair

• No AC power required

• Optically isolated on line side

• DB-25 connectors on both ends

• External DCE/DTE switch

• Made in the USA

2.2 DESCRIPTION

The Model 2018 RS-232 to current loop converter lets an asyn-

chronous RS-232 device communicate with a 20mA or 60mA current
loop device. The Model 2018 requires no AC power or batteries to
operate and supports data rates to 115.2 Kbps. When connected to an
active current loop interface, no additional power is needed. When
connected to a passive current loop interface, DC line power may be
applied to the Model 2018 via pins 9 and 21 of the DB-25 current loop
interface.

Operating full duplex, the Model 2018 supports communication
distances up to 5 miles over two unconditioned twisted pair. To guard
against data loss due to ground loops, the Model 2018 is equipped
with 2500V RMS optical isolators on the line side.

The Patton Model 2018 connects directly to either the RS-232
interface or the 20mA or 60mA current loop interface using a male or
female DB-25 connector. An external DCE/DTE switch on the Model
2018 eliminates the need for a crossover cable on the RS-232 inter­face. The Model 2018 is manufactured in the USA.

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