View User Manual () - RS232 repeater, RS422, RS485
Contents
1. ECD232 Isolator User Manual RS 232 to RS232 Optical Isolator 1 Introduction 1 1 Product Over view The ECD232iso is a cost effective 9 pin 9 pin port power RS232 Isolator for getting rid of problematic ground loops or for insuring the survivability of laptops in the field Built in a standard case ECD2372iso is fully isolation tested to 5 000Vrms and provides isolation for most RS232 interfaces The isolator has a DB9 female connector on the DTE side it can be plugged directly into a standard PC serial port The device has a DB9 male connector on the DCE side it makes the device transparently 1 2 Why use ECD232iso A ground loop is a current across the cable created by a difference in potential between two grounded points as in two buildings connected by a long run of RS232 RS422 RS485 or other data lines cables When two devices are connected and their ground potentials are different voltage flows from high to low by traveling through the data cable even the ground wire If the voltage potential is large enough your equipment will not be able to handle the excess voltage and one of your ports will be damaged Even small ground loop voltages cause transmission errors with data signals riding on top of the ground loop current Bad ground loops are a long term condition that can slowly heat and even cook your circuits The chips have a higher than normal failure rate With the test equipment and tools available2. densing 3 5 Mechanical Dimensions 3 5 1 Height width depth See drawing 3 5 2 Weight approx 20g 1 17 oiii Soi01 4010104 tn Fy MA TRAIAN A GT l z va e data tech com ng Do Ff p www ecdata tech com 2 of 2 Specifications subject to change without notice
3. in the ordinary data communications shop this phenomenon is hard to pin down and prevention is some times the easiest solution if you are getting read errors or early life component failures Using ECD232iso makes great surge protectors up to the arc over point of the chip stops ground current and guards the RS232 serial ports ECD232iso User Manual EC DATA TECHNOLOGIES PTE LTD specialist in Electronics amp Data Communication Block 208 Hougang Street 21 04 213 Singapore 530208 Tel 65 62843373 Fax 65 62857737 1 3 Difference between Isolator and Surge Protector The use of isolator in data lines eliminates interference that is otherwise common at PC connected to RS232 RS485 lines ground loop vertical effect potential differences remote lightning Surge protectors have no effect on equalizing currents that exist between the connected devices due to potential differences They also cannot prevent damage to interface components by such currents 1 4 Block Diagram 3 pin Miale OTE Spin Female DZE S000 vot Optical Isolation 2 Installation 2 1 Application diagram Cross cable straight cable ECD 32 port powered Optical Isolator 2 2 Wiring The ECD232iso has one 9 pin male to DCE and one 9 pin female connector to DTE configured This combination of male female www ecdata tech com 1 of 2 Specifications subject to change without notice ports allows the device to be by
4. passed for testing purposes Following are the appropriate wiring diagrams Cable with Cable with G_pin male 9 pin female Pea e Hi C EHE ETD232ro pornt l Host vrith 9 pin male To DTE Fiz 1 Wiring for host with pm OTE port Cable with Cable vath G_pin male 9 pin female Pea 2 Pet s 7 ECD232iso port l Host with 25 pin male DTE To DTE Fig 2 Wing for host with 245 pm DTE port Cable vith Cable vath G_pin male 9 pin female Fea 2 ema km ECD232io0 port l To DTE Host with 25 pin female DCE Fig 3 Wining for host with 25 pin DICE port 3 Technical Specification 3 1 Port Description 3 1 1 RS232 Rxd SGnd 3 wire RS232 Signals Txd ECD232iso User Manual EC DATA TECHNOLOGIES PTE LTD specialist in Electronics amp Data Communication Block 208 Hougang Street 21 04 213 Singapore 530208 Tel 65 62843373 Fax 65 62857737 3 1 2 Duplex Operation can be either half or full duplex No configuration required 3 1 3 Speed Up to 115K baud No configuration required 3 1 4 Character Setting Operates with any combination of parity data stop and start bits No configuration required 3 2 Isolation 5 000 Vrms tested 3 3 Power Port powered from RS232 data and handshake lines 3 4 Environmental Ambient Operating Temperature 40C to 65C Ambient Storage Temperature 40C to 100C Relative Humidity 10 to 90 RH non con
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