USB Serial Adapter User's Manual
Contents
1. gt CTS A CTS B 4 RTSHB CTS 4 RTS A RS 485 4 Wire Full duplex Signal Pin outs of DB 9 Male RS 485 2 Wire Half duplex Signal Pin outs of DB 9 Male RS 485 Signal Wiring e Point to Point 4 Wire Full Duplex USB 8COMi M RS 485 Device Tx B 4 9 Rx B 4 Rx A Rx B lt gt Tx B Rx lt TX A GND lt GND e Multidrop RS 485 2 Wire Half duplex USB 8COMI M RS 485 Device 2 Datat B Datat B 1 Data A Data 5 GND CND RS 485 Device x Datat B Data A GND2. Outside the unit there eight 3 pin DIP switches which are set to select the mode of operation You will need to set the switch settings to RS 232 mode or RS 422 or RS 485 mode as per the requirements of your application You need to install driver first prior to hardware installation After the setting of DIP switches and connecting power cord to the adapter you then plug the adapter to USB port to start driver installation The Mode Block Configuration Settings are listed as follows SW1 Port 1 SW2 Port 2 SW3 Port 3 SW4 Port 4 SW5 Port 5 SW6 Port 6 SW7 Port 7 SW8 Port 8 RS 485 485 Full Full Duplex 4 wire 4 wire er oN ON Half Duplex 2 wire with Echo Half Duplex 2 wire OFF O FF orF OFF without Echo JP3 Port 1 JP4 Port 2 JP5 Port 3 JP6 Port 4 JP7 Port 5 JP8 Port 6 JP9 Port 7 JP10 Port 8 for Termination and Biasing Option Configuration Inside the unit there are eight 2 x 7 14 pin header blocks which are jumpered to enable Tx Rx CTS 120 Ohm termination resistors and Tx Rx 750 Ohm BIASing resistor You will need to open up the metal case and set the jumper setting for RS 422 mode or RS 485 mode as per the requirements of your application Settings are listed as follows 1 2 Tx Termination of 120 Ohm L jumper should always be populated for RS 485 mode Pull up Tx to VCC by 750 Ohm Bias resistor This jumper should
3. be populated for pull up Tx Pull down Tx to GND by 750 Ohm Bias resistor This jumper should be populated for pull down Rx Termination of 120 Ohm This jumper should always be populated for RS 422 mode Pull up Rx to VCC by 750 Ohm Bias resistor This jumper should be populated for pull up Rx Pull down Rx to GND by 750 Ohm Bias resistor This jumper should be populated for pull down Rx CTS Termination of 120 Ohm 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 connections Before applying the option check your cable specification for proper impedance matching RS 422 485 Pin outs amp Signals Wiring RS 422 Signal Pin outs of DB 9 Male RS 422 Signal Wiring Ge Point to Point 4 Wire Full Duplex USB SCOMI M RS 422 Device 2 TxD B 4 1 TxD A 4 RxD 3 RxD B 4 TxD B 4 RxD A TxD A 5 GND i GND RS 422 with Handshaking USB 8COMi M RS 422 Device TxD B lt gt RxD B TxD A lt RxD A RxD B 4 TxDHB RxD A 4 TxD A GND lt GND RTS B lt gt CTS B RTS A lt
Download Pdf Manuals
Related Search