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Phone: 91-79-4002 4896 / 97 / 98 (M) 0-98253-50221

www.interfaceproducts.info

RS232C < - > RS485

CONVERTER’S MANUAL

Model: LD15U

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Summary of Contents for LD-15U

Page 1: ...Phone 91 79 4002 4896 97 98 M 0 98253 50221 www interfaceproducts info RS232C RS485 CONVERTER S MANUAL Model LD15U ...

Page 2: ...Technical Specifications Input RS232C RS232C TxD RxD DSR for control GND Output RS485 RS485 Tx Tx Rx Rx Signal Protection Each signal is protected by spike suppressor Opto Isolation Fuse protection Selection Switch 1 Rear side has 2 way Select switch for Selecting 2 wire or 4 wire mode in RS422 RS485 Selection Switch 2 1 Rear side has 3 way Select switch for selecting AUTO Mode no Handshaking Sign...

Page 3: ...n new models it is fully automatic No selection required A Position 1 Auto No Handshake Control B Position 2 DSR 12V to enables RS485 output C Position 3 DSR 12V to enables RS485 output TABLE I RS 232 Port D9 Female Connector Pin No Signal Name Input Output 2 Tx Output 3 Rx Input 4 DSR Input 5 Signal Ground 6 8 DTR DTS Output TABLE II Output port D9 Male connector Pin No Signal Name Input Output 3...

Page 4: ...he above connections are for Standard PC COM Port Please verify these connections for any other system or terminal before making the cable LONG DISTANCE CABLE LAYING Long distance cable between two RS422 RS485 interfaces must be a twisted pair shielded cable The pair should be used for each signal type and signal This gives high common mode noise rejection While laying the cable care should be tak...

Page 5: ...LE 4 Wire RS 422 D9 Male LD 15U Pin No Instrument Rx 3 TX RX 4 TX TX 5 RX TX 6 RX TABLE V OUTPUT CABLE 2 Wire RS 485 D9 Male LD 15U Pin No Instrument TX RX 5 TX RX TX RX 6 TX RX Above Cable diagram is for from unit to ML LD 15 U to P L C DB 9 Male is on ML LD 15U So you need to use DB 9 Female at RS 422 485 LD 15U side ...

Page 6: ...check the power on the unit 3 Attach the input cable which comes with the Converter to get the input of RS 232 signal from the computer 4 Prepare the Loop back dongle and attach it on the output RS 422 485 Port To prepare this dongle you need to short pin no 3 6 and 4 5 of a 9 pin Female connector at the soldering side Connect it on the Output port Do not connect any other pin 5 Start the Hyper Te...

Page 7: ... 79 4002 4896 97 98 M 0 98253 50221 www interfaceproducts info 6 Give the proper file name when asked at the start up See image 1 01 Image 1 01 7 Provide proper COM Port when asked to See image 1 02 Image 1 02 ...

Page 8: ... 97 98 M 0 98253 50221 www interfaceproducts info 8 Set the properties of the COM Port as shown in the image 1 03 Image 1 03 9 Go to File Menu Properties Go to Setting Tab in the Properties window See image 1 04 Image 1 04 ...

Page 9: ...3 50221 www interfaceproducts info 10 In the Settings Tab Click on ASCII Setup In the ASCII Sending part check the box of the line Echo typed characters locally Then Click OK Again click OK for Properties window See image 1 05 Image 1 05 ...

Page 10: ...e converter to 4 wire by a slide switch situated on the rear panel of the converter Now if you type anything it will give display typed twice See image 1 06 Image 1 06 If you can see the terminal window as per image 1 06 successfully it means that the converter is working properly ...

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