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3.0  CONFIGURATION

 

The Model 590A/591A is equipped with two eight-position DIP switches 
that allow configuration to a wide range of applications. This section 
describes all possible configuration settings, including the factory default 
settings.

 

3.1  CHECKING THE DEFAULT CONFIGURATION

 

The Model 590A/591A passes four optically isolated signals between the 
connected RS-232 DCE and DTE devices. The data signals, TD (pin 2), 
and RD (pin 3), have been dedicated and cannot be changed. Use two 
sets of DIP switches to set the control.

 

Data Signals: Transmit Data (TD) and Receive Data (RD):

 

The Transmit Data and Receive Data signals cannot be be altered. The 
diagram below shows the TD and RD signal directions.

 

Control Signals*: DTR/RTS, and CD/DSR/CTS

 

The Model 590A/591A passes 

 

one

 

 control signal in each direction. There 

it allows you to use it in applications that require hardware flow control. 
You may select either DTR or RTS in one direction, and CD, DSR or CTS 
in the other direction.

DCE Side

DTE Side

TD (2)

(2) TD

RD (3)

(3) RD

Summary of Contents for 590A

Page 1: ...L MODEL 590A and MODEL 591A RS 232 to RS 232 Optical Isolators SALES OFFICE 301 975 1000 TECHNICAL SUPPORT 301 975 1007 Part 07M59XA C Doc 055061UB Revised 7 5 01 An ISO 9001 Certified Company C E R T...

Page 2: ...TR RTS and CD DSR CTS 6 3 2 Setting the Internal Switches 7 Selecting the DTE Output Signals DTR or RTS 8 3 3 Selecting the DCE Output Signals CTS DSR or CD 9 4 0 Installation 10 A Model 590A 591A Spe...

Page 3: ...Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interfer ence when the equipment is operated in a commercial environment This equipment generates us...

Page 4: ...ner This number may be obtained from Patton Electronics Technical Service at Tel 301 975 1007 E mail support patton com URL www patton com Note Packages received without an RMA number will not be acce...

Page 5: ...re Size Made in USA 2 2 DESCRIPTION The Patton Model 590A 591A RS 232 to RS 232 Optical Isolators offer a simple and effective way to guard your asynchronous data and equipment from the hazards of gro...

Page 6: ...ignals TD pin 2 and RD pin 3 have been dedicated and cannot be changed Use two sets of DIP switches to set the control Data Signals Transmit Data TD and Receive Data RD The Transmit Data and Receive D...

Page 7: ...oard To access the PC board open the case by inserting a small flat blade screwdriver in the slot on either side of the case and twisting gently Figure 1 shows the location of the DIP switches on the...

Page 8: ...RTS Use Switches S1 1 S1 2 S2 1 and S 2 2 to connect either Data Termi nal Ready DTR pin 20 or Request to Send RTS pin 4 In the Iso lated setting the selected signal passes through Model 590A 591A iso...

Page 9: ...S Note Switches S1 6 S1 7 S1 8 S2 6 S2 7 and S2 8 are Reserved for Future Use Table 3 Connect CTS signal Pin 5 Switch Isolated Signal Setting S1 3 CTS Off S1 4 CTS Off S1 5 CTS On S2 3 CTS Off S2 4 CT...

Page 10: ...e DB 25 or if you need greater distance from the RS 232 interface use straight through cable 2 Connect the DB 25 female connector labeled DTE on the Model 590A 591A to your DCE device 3 When installed...

Page 11: ...ps Model 590A Up to 115 200 bps Model 591A A 5 ISOLATION 2500VRMS A 6 POWER SUPPLY Interface Powered Optional power supplied to pin 9 either side at 9 VDC at 10mA A 7 COMPLIANCE 89 336 EEC FCC Part 15...

Page 12: ...8 DCD Data Carrier Detect To Model 59XA 9 External Power To Model 59XA From Model 59XA Data Term Ready DTR 20 DIRECTION RS 232 Female DTE SETTING DIRECTION 1 FG Frame Ground 2 TD Transmit Data To Mode...

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