Patton electronic 2085 User Manual

USER
MANUAL

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

MODEL 2085

High Speed RS-232
to RS-485 Interface
Converter

An ISO-9001

Certified Company

CERTIFIED

Part# 07M2085-D
Doc# 047033U,
Rev. E
Revised 1/22/08

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 2085 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 2085 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 2085 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 2085
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 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 Service: [phone], http://www.patton.com;
[e-mail].

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 2085. 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

• Operates asynchronously, point to point or multipoint,
over 2 or 4 wires

• Up to 50 multipoint device drops in a polling environment

• Data rates to 115.2 Kbps

• Passes transmit & receive data, one control signal each direction

• No AC power or batteries are required

• Variable high/low impedance settings

• Able to operate with or without “echo”

• Carrier can be set as “constantly on” or “controlled by RTS”

• Compact size ( 2.66” x 2.10” x 0.73”)

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

• Silicon Avalanche Diode surge protection

2.2 DESCRIPTION

The Model 2085 High Speed RS-232 to RS-485 Interface

Converter provides exceptional versatility in a compact package.

Requiring no AC power or batteries for operation, the Model 2085
supports asynchronous RS-232 data rates to 115.2 Kbps over one or
two unconditioned twisted pair.

The Model 2085 passes one control signal in each direction and

can handle up to 50 terminal drops in a multipoint polling environment.
The Model 2085 may be configured for high or low impedance
operation, carrier may be set to “constantly on” or “controlled by RTS”,
and the unit can operate with or without “echo”. RTS/CTS delay may
be set for “no delay” or 8 mS.

The Model 2085 is equipped with either male or female DB-25 for

RS-232 connection. Options for twisted pair connection include
terminal blocks with strain relief, RJ-11, RJ-45 and DB-25 male or
female. Silicon Avalanche Diodes provide 600 watts per wire of
protection against harmful data line transient surges.

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3.0 CONFIGURATION

The Model 2085 is configured using an eight position DIP switch

and a DCE/DTE switch. Figure 1 (below) shows the location of the
DCE/DTE switch (externally accessible) on the PC board, as well as
the power supply daughter board and terminal block.

Figure 2 (below) shows the location of the eight position DIP switch

on the underside of the Model 2085 PC board. Figure 3 (following
page) shows the orientation of the eight position DIP switch, with
respect to ON/OFF positions.

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DCE/DTE

Switch

Terminal

Block

Figure 1. Top view of Model 2085 board, showing DCE/DTE switch.

DIP Switch

S1

Figure 2. Bottom view of Model 2085 board, showing (internal) DIP switch.

+RCV- G -XMT+

ON

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3.1 SETTING THE DCE/DTE SWITCH

For your convenience, the Model 2085 has an externally
accessible DCE/DTE switch. If the device connected to the Model
2085 is a modem or multiplexer (or is wired like one), set the switch to
“DTE”. This setting causes the Model 2085 to behave like Data
Terminal Equipment and transmit data on pin 2. If the device
connected to the Model 2085 is a PC, terminal or host computer (or is
wired like one), set the switch to “DCE”. This setting causes the Model
2085 to behave like Data Communications Equipment and transmit
data on pin 3.

3.2 DIP SWITCH CONFIGURATION

The eight switches on switch set S1 (see Figure 3, above)
configure the Model 2085 for echo mode, carrier control method,
RTS/CTS delay, “transmit off” impedance, receive impedance, and 2­wire/4-wire operation. These switches are located

internally

on the
Model 2085's PC board. To access switch set S1, use a small flat
blade screwdriver to pop open the Model 2085's case as shown in
Figure 4, below.

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Figure 4. Opening the Model 2085's plastic case with a small screwdriver

Figure 3. Close-up of DIP switch showing “ON” and “OFF” positions

ON

OFF

ON

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