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APPENDIX A

SPECIFICATIONS

Transmission Format: Asynchronous

Data Rate: Up to 115,200 bps

Transmit Line: 2, 4 wire unconditioned twisted pair

Transmit Mode:  Full or half duplex

Transmit Level: 0 dBm

Range: Up to 9 miles

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 
the terminal raises RTS

Carrier: The carrier is strap selected either continuous operation or

switched operation, controlled by RTS

Surge Protection:  600W power dissipation at 1 mS and response 

time less than 1.0 pS

Power: None required, uses ultra low power from EIA data and con

trol signals

Size: 2.66" x 2.10" x 0.73"

APPENDIX B

RS-232C PIN CONFIGURATIONS

13

14

1- (FG) Frame Ground
2- (TD) Transmit Data

To Model 285

3- (RD) Receive Data

From Model 285

4- (RTS) Request to Send

To Model 285

5- (CTS) Clear to Send

From Model 285

6- (DSR) Data Set Ready

From Model 285 

7- (SG) Signal Ground
8- (DCD) Data Carrier Detect

From Model 285

To Model 285

Data Term. Ready (DTR) - 20

DIRECTION

STANDARD "DCE" SETTING

DIRECTION

1- (FG) Frame Ground
2- (TD) Transmit Data

From Model 285

3- (RD) Receive Data

To Model 285

4- (RTS) Request to Send

From Model 285

5- (CTS) Clear to Send

To Model 285

6- (DSR) Data Set Ready

To Model 285

7- (SG) Signal Ground
8- (DCD) Data Carrier Detect

To Model 285

From  Model 285

Data Term. Ready (DTR) - 20

DIRECTION

STANDARD "DTE" SETTING

DIRECTION

Содержание 285

Страница 1: ...MANUAL MODEL 285 and 285S RS 232 to RS 485 Interface Converters SALES OFFICE 301 975 1000 TECHNICAL SUPPORT 301 975 1007 http www patton com Part 07M285 B Doc 047012UB Revised 9 29 93 Revision C and a...

Страница 2: ...ned 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 Ele...

Страница 3: ...itch to DCE This setting causes the Model 285 to behave like Data Communications Equipment and transmit data on pin 3 3 3 2 SETTING CONFIGURATION SWITCHES SW1 AND SW2 The five switches shown in Figure...

Страница 4: ...ou how to set the Model 285 s configu ration switches to fit several common applications If you have any questions about the proper settings for your application call Patton Technical Support at 301 9...

Страница 5: ...ls you how to properly connect the Model 285 to the RS 485 and RS 232 interfaces and how to operate the Model 285 4 1 CONNECTION TO THE RS 485 INTERFACE To function properly the Model 285 must have on...

Страница 6: ...e positive and negative on the terminal block again making careful note of which color is positive and which color is negative Ultimately you will want to construct a two pair cross over cable that ma...

Страница 7: ...s of whether you are making the RS 485 connection via DB 25 RJ 11 RJ 45 or terminal blocks For specific wiring instructions please refer to the previous pages of Section 4 4 2 CONNECTION TO THE RS 232...

Страница 8: ...one required uses ultra low power from EIA data and con trol signals Size 2 66 x 2 10 x 0 73 APPENDIX B RS 232C PIN CONFIGURATIONS 13 14 1 FG Frame Ground 2 TD Transmit Data To Model 285 3 RD Receive...

Страница 9: ...APPENDIX C BLOCK DIAGRAM 15...

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