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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.

1.3  SERVICE

All warranty and nonwarranty repairs must be returned freight pre-

paid and insured to Patton Electronics. All returns must have a Return
Materials Authorization number on the outside of the shipping contain-
er. This number may be obtained from Patton Electronics Technical
Support:

Tel:

(301) 975-1007 

Email: [email protected].
www: http://www.patton.com

Patton Electronics' technical staff is also available to answer any

questions that might arise concerning the installation or use of your
Model 2085RC. Technical Service hours: 8AM to 5PM EST, Monday
through Friday.

2.0  GENERAL INFORMATION

Thank you for your purchase of this Patton Electronics product.

This product has been thoroughly inspected and tested and is warrant-
ed for One Year parts and labor. If any questions during installation or
use of the 2085RC, contact Patton Electronics Technical Support at
(301) 975-1007.

2.1  FEATURES

• Convenient rack card features two short range modems 

• Data rates to 115.2 Kbps 

• Supports up to 50 multipoint device drops in a polling environ-

ment 

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

• Variable high/low impedance settings

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

• Able to operate with or without “echo”

• Features 6 easy-to-read LEDs 

• Silicon Avalanche Diode surge protection

• Fits conveniently in Patton’s rack chassis

2.2  DESCRIPTION

The Model 2085RC RS-232 to RS-485 Interface Converter is a

dual rack card incorporating converters. Both units support asynchro-
nous data rates to 115.2 Kbps over 1 or 2 twisted pairs and support
distances to 9.4 miles (19 AWG @19.2 kbps). The Model 2085RC fea-
tures 6 easy-to-read front panel LEDs and incorporates Silicon
Avalanche Diodes for protection against the damaging effects of near-
by lightning strikes and other harmful transients.

The Model 2085RC passes one control signal in each direction

and can handle up to 50 terminal drops in a multipoint polling environ-
ment.

The Model 2085RC may be configured for high or low imped-

ance operation, carrier may be set to “constantly on” or “controlled by
RTS”. Additionally,, and the unit can operate with or without “echo”.
RTS/CTS delay may be set for “no delay” or 8 mS.

Filling one function card slot on Patton’s Model 1000R16 rack

chassis, the Model 2085RC is available with RJ-11 or RJ-45 rear inter-
face cards. For workgroup and desktop communications, the Model
2085RC also fits in Patton’s 2, 4 and 8 slot ClusterBoxes™.

NOTE:

Packages received without an RMA number will not be

accepted.

Summary of Contents for 2085RC

Page 1: ...RS 232 to RS 485 Converter Dual Port Rack Mount Card SALES OFFICE 301 975 1000 TECHNICAL SUPPORT 301 975 1007 http www patton com Part 07M2085RC B Doc 047052UB Revised 05 11 99 C E R T I F I E D An IS...

Page 2: ...ges 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 de...

Page 3: ...evice drops in a polling environ ment Passes transmit receive data one control signal each direction Variable high low impedance settings Carrier can be set as constantly on or controlled by RTS Able...

Page 4: ...criptions of each switch s function SWITCH SET S1 DIP switch S1 is used to configure receive impedance RTS CTS delay carrier control operation and echo enable disable The summary table below shows the...

Page 5: ...Modes Switches S2 3 and S2 4 are set together to determine whether the Model 2085RC is in 2 wire or 4 wire operating mode Note 2 wire mode is half duplex only S1 2 S1 3 Setting On On 2 wire mode Off...

Page 6: ...ch S4 is used to configure transmit impedance and 2 wire 4 wire operations The summary table below shows the factory default settings for switch S4 Following the summary table is a detailed descriptio...

Page 7: ...e In the connected closed position the strap links RJ 11 pins 1 and 6 RJ 45 pins 2 and 7 to frame ground These pins can be used as connections for the twisted pair cable shield In the open disconnecte...

Page 8: ...000R16 RACK CHASSIS The Model 1000R16 Rack Chassis Figure 5 has card slots plus its own power supply Measuring only 3 5 high the Model 1000R16 is designed to occupy only 2U in a 19 rack Sturdy front h...

Page 9: ...RC is wired as a DCE Data Communications Equipment Therefore it wants to connect to a DTE Data Termination Equipment If your RS 232 output device is a DTE you may need to use a special cable such as a...

Page 10: ...ire SIGNAL PIN PIN SIGNAL XMT 3 3 XMT XMT 4 4 XMT RJ 45 Cable 2 Wire SIGNAL PIN PIN SIGNAL XMT 4 4 XMT XMT 5 5 XMT Connection to ground is optional 4 4 2 MULTIPOINT TWISTED PAIR CONNECTION The Model 2...

Page 11: ...rmat Asynchronous Data Rate 0 to 115 2 Kbps Control Signals DSR turns ON immediately after the terminal raises DTR DCD turns ON after recognizing the receive signal from the line CTS turns on after th...

Page 12: ...distance table as a general guideline only APPENDIX C PATTON ELECTRONICS MODEL 2085RC FACTORY REPLACEMENT PARTS The Patton Model 2085RC rack system features interchangeable rear half cards power cords...

Page 13: ...ire RJ 45 Contact Number Circuit Description 1 N A Not Used 2 125 DSR 3 109 Received Line Signal Indicator CD 4 108 2 DTE Ready DTR 5 102 Signal Common 6 104 Received Data 7 103 Transmitted Data 8 106...

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