Patton 222NRC User Manual

USER
MANUAL

MODEL 222NRC

Miniature RS-232 to
RS-422 Converter:
Rack Mount Card

Part# 07M222NRC-B
Doc# 052021UB
Revised 4/30/96

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 222NRC 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 222NRC 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 222NRC 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
222NRC does cause interference to radio or television reception, which
can be determined by turning the power off or disconnecting the
RS-232 interface, the user is encouraged to try to correct the
interference by one 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 222NRC. Technical Service hours: 8AM to 5PM EST, Monday

through Friday.

In the event that the user detects intermittent or continuous product
malfunction due to nearby high power transmitting radio frequency
equipment, the user is strongly advised to take the following steps:

1) Use only data cables with an external outer shield bonded to a

metal or metalized connector, and...

2) Configure the rear card as shown in Section 3.3.1 in this

manual.

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2.0 GENERAL INFORMATION

3.0 CONFIGURATION

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

• Convenient rack card features two interface converters

• Data rates to 19.2 Kbps over two twisted pair

• RTS and CTS are looped on the RS-232 interface

• Bidirectional conversion between unbalanced RS-232 and
balanced RS-422 interfaces

• Carrier detect LEDs can be customized

• Silicone Avalanche Diode surge protection

• Fits conveniently in Patton’s rack chassis

• Made in USA

2.2 DESCRIPTION

The Model 222NRC Interface Converter Rack Card is a dual

rack card incorporating two converters. The converters let computers,
terminals and modems using the RS-232 interface communicate with
devices using RS-422 balanced electrical signals. Both units operate
full duplex at data rates to 19.2 Kbps over 2 twisted pairs. The Model
222NRC features 13 easy-to-read front panel LEDs, which monitor the
status of data transmission. As an added feature, a set of easily
accessible configuration straps allows the user to control the function of
the carrier detect LEDs.

The Model 222NRC uses the latest surface mount technology to
attain high quality short range modem performance in a convenient
rack card. Filling one function card slot on Patton’s R16P rack chassis,
two Model 222NRCs are available with RJ-11 or RJ-45 rear interface
cards. For workgroup and desktop communications, the Model
222NRC also fits in Patton’s 2, 4 and 8 slot Cluster Boxes. The
combination of rack mount, Cluster Box and interface powered units
provides a completely integrated “networking” solution.

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This section describes the location and orientation of the Model
222NRC's configuration jumpers, provides detailed instructions on
setting each jumper, and describes the settings for each of the rear
connection cards.

The Model 222NRC uses two jumpers that allow configuration to a
wide range of asynchronous applications. These jumpers are
accessible when the card is slid out of the rack chassis (see Figure 1,
below). Once the hardware is configured, the Model 222NRC is
designed to operate transparently, without need for frequent re­configuration: just set it and forget it!

JP1-A

ON

1
2
3

Normal

ON

1
2
3

Normal

JP1-B

Figure 1. Model 222NRC card, showing location of configuration jumpers

3.1 JUMPER LOCATIONS AND ORIENTATION

The configuration jumpers on the Model 222NRC board and the
rear interface card allow you to configure the function of both front
panel “Carrier Detect” LEDs, as well as the rear interface card CD
signal. Figure 2 (below) shows the orientation of these jumpers. Notice
that each jumper can either be on pegs 1 and 2, or on pegs 2 and 3.
Note: Pin 1 is always located on the top or left side of the jumper set.

123 123 123

Figure 2. Orientation of interface card straps

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