Patton electronic 222N9 User Manual

USER
MANUAL

MODEL 222N9

Ultra-miniature RS-232
(EIA-574) to RS-422
Interface Converter

CERTIFIED

An ISO-9001

Certified Company

Part #07M222N9-B
Doc. #030013U,
Rev. C
Revised 1/21/08

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

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 222N9 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 222N9 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 222N9 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
222N9 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 Patton
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 at [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 222N9. 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

• Conforms to EIA RS-422 Standard

• Bi-directional data conversion

• Data Rates to 19.2 Kbps over two twisted pair

• No AC power required–draws operating power from RS-232 signals

• Passes transmit and receive data–handshaking lines looped back

• Convenient thumb screws on DB-9 (female) interface

• Ultra-miniature size (2.50" x 1.20" x 0.75")

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

• Made in the USA

2.2 DESCRIPTION

The Patton Model 222N9 RS-232 (EIA-574) to RS-422 interface
converter allows asynchronous PCs, terminals and laptops employing

the EIA-574 (RS-232/ DB-9) interface to communicate with devices
using RS-422 balanced electrical signals. Facilitating bi-directional
data conversion over two twisted pair, the Model 222N9 draws all
necessary operating power from data and control voltages on the EIA­574 interface. The Model 222N9 supports data rates to 19.2 Kbps and
distances to 4000 feet. All control signals are looped back at the EIA­574 interface.

The Model 222N9 is housed in an ultra-miniature ABS plastic
enclosure measuring 2.5”L x 1.2” H x .75” W. Options for twisted pair
connection on the RS-422 side include terminal block with strain relief,
RJ-11 and RJ-45. The EIA-574 side is available with a choice of male
or female DB-9 connector.

The surge protected Model 222N9S uses high speed avalanche
diodes to intercept data line transient surges and shunt them safely to
chassis ground. Compliant with IEC 801.5 level 2, 1kV, the 222N9S
can protect itself and connected equipment from nearby lightning
strikes, and other surges of electromagnetic radiation.

3

3.0 INSTALLATION

The Model 222N9 is easy to install and requires no pre­configuration. This section tells you how to properly connect the Model
222N9 to the RS-422 (twisted pair) and EIA-574 (DB-9) interfaces, and
how to operate the Model 222N9.

3.1 CONNECTION TO THE RS-422 INTERFACE

The Model 222N9 supports data-only communication distances up
to 4000 feet between itself and the RS-422 device. To function
properly, the Model 222N9

must

have two twisted pairs of metallic wire.
These pairs must be dry, unconditioned metallic wire, between 19 and
26 AWG (the higher number gauges may limit distance somewhat).

For your convenience, the Model 222N9 is available with several
different physical interfaces on the RS-422 side: RJ-11 jack, RJ-45
jack, and terminal blocks with strain relief.

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

The RJ-11 and RJ-45 connectors on the Model 222N9'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 --------------RCV­4----------------XMT- 4 --------------XMT+
5----------------RCV+ 5 --------------XMT­6----------------GND* 6 --------------RCV+

7 --------------GND*
8 --------------N/C

* Connection to Ground is Optional

When connecting two Model 222N9s 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 222N9s use a 6­wire RJ-11 connector. Similar logic should be followed when using RJ­45 connectors or a combination of the two.

4