SER-COMi-M SER-COMi-SI-M
Contents
1. 4 wire cabling scheme SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 19 RS 485 2 Wire Scheme The following diagram shows RS 485 2 Wire scheme SER COMi M or SER COMi SLM GND Data Data 2 wire cabling scheme The RS 485 operation of SER COMi M SER COMi SI M allows for 2 wire cabling Several RS 485 2 wire devices are connected in parallel to the wires which is call bus topology Each device can either send or receive data at a given time so it is operating in half duplex mode Copyright 2011 TITAN Electronics Inc All brand names and trademarks are the property of their respective owners SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 202. ccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 17 RS 422 without handshaking signals connected eeeeeeeeeeeeeeeeeeeeeeeeeeeeeteeeeeeee 17 RS 422 with handshaking signals connected eeeeeeeeeeeeeeeeeeeeeeeeeeeeneeeeeeeeeeeeeeeees 18 RS 422 and RS 485 4 Wire SCHEMGE cccccccccccceccccecceeeeeeeceeeeeeeeceeeeeeeeeeeeeeeeeeeeeess 19 RS 485 2 VINE SC NEMO erentcantnadiuenduautzastustiiesturdueread artes 20 SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 2 Introduction amp Specifications of Hi Speed RS 232 to RS 422 485 Converters RS 232 to RS 422 485 Converter SER COMi M Opto isolated RS 232 to RS 422 485 Converter SER COMi SI M with optical isolation 2000V with surge protection 25KV ESD on all signal lines to prevent interference to protect system and minimize down time Introduction of SER COMi M amp SER COMi SI M The SER COMi M and SER COMi SI M are used to convert RS 232 signals to RS 422 485 signals The converters provide instant connectivity to RS 422 485 communication devices for factory automation equipment multi drop data collection devices barcode readers time clocks scales data entry terminals PC to PC long distance communications up to 1 3KM and serial communication in harsh environments The SER COMi M and SER COMiI SI M provide an industrial solution for applications requiring single node or multi drop communications ove
3. RTS CTS CTS RS 485 data signals TX TX RX RX 4 wire and data data 2 wire Monitor LEDs of TxD RxD indicating port status Wide input power range 9V DC to 48V DC Includes an external switching terminal power adapter Opto isolated RS 232 to RS 422 485 Converter SER COMi SI M Converts RS 232 port to high speed RS 422 485 port RS 232 port can be selected to DCE or DTE pin assignment RS 422 485 port is optically isolated with 2000 Volt DC optical isolation RS 422 485 port is protected by surge protector on all signal lines to withstand electrostatic discharge and power surges up to 25KV ESD Data rates 300 bps to 1M bps RS 232 Connector One DB 9 female connector RS 422 485 Connector One DB 9 male connector and one 5 pin terminal blocks Auto transmit receive control for 2 wire RS 485 half duplex operation Termination and Bias resistors installed on board RS 422 data signals TX TX RX RX GND RTS RTS CTS CTS RS 485 data signals TX TX RX RX 4 wire and data data 2 wire Monitor LEDs of TxD RxD indicating port status Wide input power range 9V DC to 48V DC Includes an external switching terminal power adapter SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 4 Power Supply The SER COMi M and SER COMi SI M are working in wide input power range from 9V DC to 48V DC An external switching terminal power adapter is provided in the package 9V DC to 48V
4. TITAN RS 232 to RS 422 485 Converters User Guide a Models SER COMi M SER COMiI SI M Web www titan tw Support info titan tw Document Part Number TN 068 Version 1 00 Issue Date 2011 09 11 The computer programs provided with the hardware are supplied under a license The software provided should be used only with the IP COM series hardware designed and manufactured by TITAN Electronics Inc Trademarks TITAN and the logo is a registered trademark of TITAN Electronics Inc in Taiwan Microsoft Windows Windows XP Windows Vista Windows Server Windows 7 Windows 8 are trademarks of Microsoft Corporation All other trademarks and brands are property of their respective owners Copyright Copyright 2011 2015 TITAN Electronics Inc All right reserved Reproduction of the manual and software without permission is prohibited Disclaimer TITAN Electronics Inc provides this document and computer programs as is without warranty of any kind either expressed or implied including but not limited to its particular purpose TITAN Electronics Inc reserves the right to make improvements and changes to this user manual or to the products or the computer programs described in this manual at any time Information provided in this manual is intended to be accurate and reliable However TITAN Electronics Inc assumes no responsibility for its use or for any infringements on the rights of third parties that ma
5. RS 422 Mode Pin out The table below shows the SER COMi M SER COMi SI M s RS 422 mode pin out of the DB 9 male connector Penam Pte veser o oumu RS Eees ite oe e ret oT cme To Sone ostve poar 8 eo OTS ome See ene rary SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 8 RS 485 Output Port Pin Assignment of DB9 Male Connector 123 4 5 6789 DB9 Male connector pin numbers RS 485 Full Duplex Mode Pin out The table below shows the SER COMi M SER COMi SI M s RS 485 full duplex mode pin out of the DB 9 Male connector TxD Transmit Data negative polarity TxD Transmit Data positive polarity RxD Receive Data positive polarity RxD Receive Data negative polarity SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 9 RS 485 Half Duplex Mode Pin out The table below shows the SER COMi M SER COMi SI M s RS 485 half duplex mode pin out of the DB 9 male connector Data Transmit Receive Data negative polarity Data Transmit Receive Data positive polarity SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 10 RS 422 Output Port Pin Assignment of 5 pin Terminal Block Pinl Pin2 Pin3 Pin4 Pin5 5 Pin Terminal Block Connector Pin out RS 422 Mode Pin out The table below shows the SER COMi M SER COMI SI M s RS 422 mode pin out of the 5 pin terminal bock connector TxD Transmit Data n
6. voltage range the GND of sender and receiver must be connected somehow To insure the signals are in the valid voltage range and the differential voltage can be correctly sensed by the receiver the GND lines of the transmitter and receiver must be connected RS 422 without handshaking signals connected The following diagram shows RS 422 without handshaking signals connected SER COMiM or 7 RS 422 Device SER COMi SI M ji GND RxD RxD TxD TxD RS 422 without handshaking signals connected SER COMi M amp SER COMi SI M_ RS 232 to RS 422 485 Converters User Manual 17 RS 422 with handshaking signals connected The following diagram shows RS 422 with handshaking signals connected SER COMi M or 7 RS 422 Device SER COMi SL M CTS CTS RTS RTS GND RxD RxD TxD TxD RS 422 with handshaking signals connected SER COMi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 18 RS 422 and RS 485 4 Wire Scheme The RS 422 requires dedicated wire pairs for transmit and receive The transmit wires are used to send data to as many as 10 receivers as stated in the specifications of RS 422 Since the SER COMi M SER COMi SI M uses RS 485 line driver technology up to 32 receivers are possible The following diagram shows RS 422 and RS 485 4 wire scheme SER COMEM or sv RS 422 485 RS 422 485 RS 422 485 SER COMi SLM 9 2 a Device Device Device GND RxD RxD TxD TxD
7. DC power input connector Setting of RS 232 to DCE or DTE Inside the converter there are two 2x3 JP1 JP2 header blocks which are jumpered to select the RS 232 port pin assignment to DCE or DTE Jumper Function gt gt Fig 2 DCE setting Fig 3 DTE setting SER COMi M amp SER COMi SI M_ RS 232 to RS 422 485 Converters User Manual 5 RS 232 DCE Pin Assignment The RS 232 serial port is a DB 9 female connector It can be configured as Data Communications Equipment DCE or Data Terminal Equipment DTE for RS 232 signals input 543 2 1 9 8 7 6 DB9 Female connector pin numbers Following is the table of RS 232 pin assignments for Data Communications Equipment DCE emnue _PeTipe oeseri 8 te osha sey 8 te osionsa e SER COMi M amp SER COMi SI M_ RS 232 to RS 422 485 Converters User Manual 6 RS 232 DTE Pin Assignment The RS 232 serial port is a DB 9 female connector It can be configured as Data Communications Equipment DCE or Data Terminal Equipment DTE for RS 232 signals input 543 2 1 9 8 7 6 DB9 Female connector pin numbers Following is the table of RS 232 pin assignments for Data Terminal Equipment DTE C omnameer Paye oeenn ove orm oaa on as 8 ove rts Fear Tose 8 comes SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 7 RS 422 Output Port Pin Assignment of DB9 Male Connector 123 4 5 6789 DB9 Male connector pin numbers
8. deastnasdnantnnntnantnnnduantnantcantnanccantnendaadsueateaniuestuauduasduadiiiv tivities 8 RS 485 Output Port Pin Assignment of DB9 Male Connector 9 RS 485 Full Duplex Mode Pin Out cccceceeeeeeeeeeeeeeeeeeeeeeeeeeeeaaaeeeeeeeeeeeeeeesnaeees 9 RS 485 Half Duplex Mode PIn OUtssreccesicascccssnnnersitcaninenteusanentneuenentmaneecacenmeneeewextede 10 RS 422 Output Port Pin Assignment of 5 pin Terminal Block 11 RS 422 Mode Pin Out ccccccccccecccceecceeceeeeececeeeceeeceeeeeeeeeeeeeeeeeceeeceeeeeeeseseeeeeeeeeeeeess 11 RS 485 Output Port Pin Assignment of 5 pin Terminal Block 12 RS 485 Full Duplex Mode Pin Out cccceccccceeeeeeeeeeeeeeeeeeeeeeeeeeeesenaeaeeeeeeeeeeeeeee 12 RS 485 Half Duplex Mode Pin Out ccccceceeeeeeee eee eeeeeeeeeeeeee sees eeeeeeeaaeeeeeeeeeeeeeeees 13 RS 422 amp RS 485 Mode Configuration cccccccccseeeeeeseeeeeeeeeeeeeeeeeeeeaes 14 Termination and Biasing Option Configuration ccc ccsesssseeeeeeeeeeeeeee 15 LerminatioM RESISION renee e E ERER AE EERE 15 Biasing Resistors soscacksnsecnccindadenusesshe ccczaguoien sens seed bedensdintsaaneneeastneckdesaseienodarcadeneseaeeagans 15 Jumper Setting to Enable Termination amp Biasing ReSIStOIS cccccccccceeseeeeeeeeeees 16 Proper Wiring for RS 422 485 Operation cccccsessseeeeeeeeeeeeeeeeeeeeeeeeeeeees 17 RS 422 and RS 485 Transmission Technique
9. egative polarity TxD Transmit Data positive polarity RxD Receive Data positive polarity RxD Receive Data negative polarity SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 11 RS 485 Output Port Pin Assignment of 5 pin Terminal Block Pinl Pin2 Pin3 Pin4 Pin5 5 Pin Terminal Block Connector Pin out RS 485 Full Duplex Mode Pin out The table below shows the SER COMi M SER COMi SI M s RS 485 full duplex mode pin out of the 5 pin terminal bock connector TxD Transmit Data negative polarity TxD Transmit Data positive polarity RxD Receive Data positive polarity RxD Receive Data negative polarity SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 12 RS 485 Half Duplex Mode Pin out The table below shows the SER COMi M SER COMi SI M s RS 485 half duplex mode pin out of the 5 pin terminal block connector Data Transmit Receive Data negative polarity Data Transmit Receive Data positive polarity SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 13 RS 422 amp RS 485 Mode Configuration Outside the converter there is a 3 pin DIP switches which are set to select the mode of operation You will need to set the switch settings to RS 422 mode or RS 485 mode as per the requirements of your application The RS 422 amp RS 485 Mode Block Configuration Settings are listed as follows Loe Opera
10. is one 7 x 3 21 pins Fig 4 header blocks which are jumpered to enable Tx Rx CTS 120 Ohm termination resistors and Rx Tx 750 Ohm biasing resistor You will need to open up the metal case and set the jumpers to RS 422 mode or RS 485 mode as per the requirements of your application Termination and biasing settings are listed as follows Fig 4 Termination and Biasing resistors setting 1 2 enable Tx Termination of 120 Ohm 2 3 disable This jumper should always be populated for RS485 Half Duplex mode 4 5 enable Pull up Tx to VCC by 750 Ohm Bias resistor 5 6 disable This jumper should be populated for pull up Tx 7 8 enable Pull down Tx to GND by 750 Ohm Bias resistor 8 9 disable This jumper should be populated for pull down Tx 10 11 enable Rx Termination of 120 Ohm This jumper should always be populated for RS 422 and RS 485 Full Duplex mode Pull up Rx to VCC by 750 Ohm Bias resistor 14 15 disable This jumper should be populated for pull up Rx Pull down Rx to GND by 750 Ohm Bias resistor 17 18 disable This jumper should be populated for pull down Rx 19 20 enable CTS Termination of 120 Ohm 20 21 disable This jumper should always be populated for RS 422 mode Note Sometimes when operating in RS 422 or RS 485 it is necessary to configure termination and biasing of the data transmission lines Generally this must be done in the cabling since this depends on the installation of connecti
11. ons Before applying the option check your cable specification for proper impedance matching Biasing of data lines must only occur at a single point anywhere in the cabling SER COMi M and SER COMi SI M provide biasing for ease of installation Please be sure to disable this inside the unit if your cabling already provides biasing Termination must not be installed in the middle of the cable It is only permitted at both ends Since a computer controlled serial port is almost always at one end of the cable termination is enabled by default SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 16 Proper Wiring for RS 422 485 Operation This section will provide proper wiring information about RS 422 and RS 485 data communication It is necessary to have the basic knowledge to avoid or to find errors in data transmission Failures in cabling are responsible for the vast majority of transmission problems RS 422 and RS 485 Transmission Technique The RS 422 and RS 485 use the same balanced transmission method Signals are not transmitted as voltage on a single wire as RS 232 does Instead two wires are used when one carries high voltage the other one carries low voltage The signal is defined by the different in voltage between those two wires This hardens the transmission against noise Usually twisted pair cables are used which further reduces the sensitivity for noise To make sure the signals meet the common
12. r short and long distance In RS 485 half duplex mode the SER COMi M and SER COMi SI M also provide automatic data transmit receive control Features of Optical Isolation amp Surge Protection SER COMi SI M Optical isolation and surge protection are available to SER COMi SI M The SER COMiI SI M converter is optically isolated with 2000 Volt DC optical isolation The optical isolation protects your PC from spikes and surges on the RS 422 485 network by converting the electrical pulse into an optical signal and then changing it back into an electrical pulse Your computer is well protected since the surges and spikes cannot cross the optical link The SER COMi SI M is protected by surge protector to withstand electrostatic discharge and power surges up to 25KV ESD Surge suppression on all signals prevent from damages caused by lightning or high voltage SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 3 Specifications amp Features RS 232 to RS 422 485 Converter SER COMi M Converts RS 232 port to high speed RS 422 485 port RS 232 port can be selected to DCE or DTE pin assignment Data rates 300 bps to 1M bps RS 232 Connector One DB 9 female connector RS 422 485 Connector One DB 9 male connector and one 5 pin terminal blocks Auto transmit receive control for 2 wire RS 485 half duplex operation Termination and Bias resistors installed on board RS 422 data signals TX TX RX RX GND RTS
13. tion Mode S1 S2 83 m 4 wire with handshaking k RS 485 Full Duplex 4 wire Pa Half Duplex 2 wire with Echo Half Duplex 2 wire without Echo SER COMi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual Termination and Biasing Option Configuration Termination Resistor When transmitted signals arrive at the end of a cable they get reflected They travel on the cable some more times which is called ringing This can cause false reading of transmitted data For long cables termination resistors are required These increase the damping of reflection The value of the termination resistor must match the impedance of the cable typically 120 ohms Biasing Resistors In RS 485 operation the sender must activate the transmitter before sending data and deactivate it when all data is sent At times when no devices send data all transmitters are inactive As the result the data lines are floating and the differential voltage is undefined It may happen the next data is not correctly recognized because the change from undefined to data signals is not detected To avoid such problems the data lines should be polarized by biasing resistors The biasing resistors must not be too small typical biasing resistors are 750 ohms in high and low level SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 15 Jumper Setting to Enable Termination amp Biasing Resistors Inside the converter there
14. y result from its use This product might include unintentional technical or typographical errors Changes are periodically made to the information herein to correct such errors and these changes are incorporated into new editions of the publication SER COMIi M amp SER COMi SI M RS 232 to RS 422 485 Converters User Manual 1 Content Introduction amp Specifications of Hi Speed RS 232 to RS 422 485 GONVOIGN S assess acetates hetutenscetesdseusteestcetentsauaseecesctcensctelesdstedeuetdes seusuesseucerecnsnecns 3 Introduction of SER COMIi M amp SER COMI SI M sscceeeeesssesseeeenees 3 Features of Optical Isolation amp Surge Protection SER COMi SI M 3 Specifications amp Features aiccisicces sade tecntascccncie cecetentaacenscneetnusbadeeehsanccenenetemeeds 4 RS 232 to RS 422 485 Converter SER COMI M ccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeaaees 4 Opto isolated RS 232 to RS 422 485 Converter SGER COMI SI M eeeeees 4 Power SUPPIy sac eoti ceccec tcc test aesae aa Haana ieaiaia aeriana eaan aidaa 5 Setting of RS 232 to DCE or DTE ssuassnnnunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn 5 RS 232 DCE Pin Assignment sssssnsssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn nnna 6 RS 232 DTE Pin Assignment ssssssnssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn nanna 7 RS 422 Output Port Pin Assignment of DB9 Male Connector 8 RS 422 MOUS Pin O t ccan
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