Patton electronics 222N, 222NS User Manual

USER
MANUAL

MODEL 222N
and 222NS

Miniature RS-232 to
RS-422 Converters

Part #07M222N-C
Doc. #023022U, Rev. D
Revised 1/23/08

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

CERTIFIED

An ISO-9001

Certified Company

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 222N. Technical Service hours: 8AM to 5PM EST, Monday

through Friday.

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3.0 CONFIGURATION

The Model 222N 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 DTE/DCE switch.

The figure below shows the location of the DTE/DCE switch on the
PC board, as well as the location of the terminal block and surge
suppressors ("S" model only).

3.1 SETTING THE DTE/DCE SWITCH

For your convenience, the Model 222N has an externally
accessible DTE/DCE switch (see diagram below). If the device
connected to the Model 222N is a modem or multiplexer (or is wired like
one), set the switch to "DTE". This setting causes the Model 222N to
behave like Data Terminal Equipment and transmit data on pin 2.

If the device connected to the Model 222N is a PC, terminal or host
computer (or is wired like one), set the switch to "DCE". This setting
causes the Model 222N to behave like Data Communications
Equipment and transmit data on pin 3.

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DCE DTE

DCE/DTE

Switch

Surge

Suppressors

(222NS only)

Terminal

Block

DCE DTE