Advantech UNO-1170E user manual COM1~COM2 RS-232 Interfaces, COM3 RS-232/422/485 Interfaces

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2.2 COM1~COM2: RS-232 Interfaces

The UNO-1170 offers two standard RS-232 serial communication inter- face port on COM1 and COM2. Please refer to A.2 for pin assignments.

2.3 COM3: RS-232/422/485 Interfaces

The UNO-1170 offers two RS-232/422/485 serial communication inter- face ports, and they are COM2 and COM3. Both port can be configured individually to either RS-232, RS422/485 by using on-board jumpers.

Please refer to A.3 for pin assignments and Table 2.1 lists the default set- ting of each port.

Table 2.1: COM3 Default Settings

COM Port

Default Setting

 

 

COM3

RS-422/485

 

 

2.3.1 TI 16C550 UARTs with 16-byte Standard

Advantech UNO-1170 comes standard with TI 16C550 UARTs contain- ing 16 bytes FIFOs. These upgraded FIFOs greatly reduce CPU overhead and are an ideal choice for heavy multitasking environments.

2.3.2 Jumperless RS-422/485

In RS-422/485 mode, UNO-1170 automatically sense signals to match RS-422 or RS-485 network. No need to change jumpers.

2.3.3Automatic Data Flow Control Function for RS-485

In RS-485 mode, UNO-1170 automatically senses the direction of incom- ing data and switches its transmission direction accordingly. Therefore no handshaking signal (e.g. RTS signal) is necessary. This feature lets you simply and quickly build an RS-485 network with just two wires. More importantly, application software previously written for half duplex RS- 232 environments can be maintained without need for modification.

UNO-1170 User Manual

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Contents UNO-1170/1170E Copyright Notice Acknowledgements Product Warranty 2 years FCC Class a Technical Support and AssistancePacking List Safety Instructions Safety Precaution Static Electricity Contents Appendix Programming the Watchdog Timer UNO-1170 Overview Hardware Specifications IntroductionSafety Precautions Relative humidity 95% @ 40CChassis Dimensions UNO-1170 SeriesUNO-1170E Chassis Dimensions Page Hardware Functionality UNO-1170 Peripherals UNO-1170 Front ViewUNO-1170E Front View COM1~COM2 RS-232 Interfaces COM3 RS-232/422/485 InterfacesJumper Setting for RS-422/485 Interface Default Setting 4 RS-232/422/485 SelectionTerminal Resistor Setup for RS-422/485 LAN Ethernet Connector Power ConnectorUniversal Serial Bus Connectors LED IndicatorsPS/2 Keyboard and Mouse Connector VGA VGA Display ConnectorAudio Reset Reset ButtonBattery Backup Sram LED and Buzzer for System DiagnosisProgrammable LED Control Bit 14 PCI/104+ Connectors UNO-1170E only RS-422/485 Jumper SettingsPage Initial Setup CompactFlash Card Installation Page USB Keypro and Keypro Bracket Installation Power Connection Chassis GroundingPC/104+ Card Installation UNO-1170E Page Page Hard Drive installation UNO-1170E Page Bios Setup and System Assignments DIN-rail Mounting SetupWallmounting Setup System Settings and Pin Assignments Appendix a System Settings and Pin Assignments System I/O Address & Interrupt AssignmentsTable A.2 UNO-1170 Interrupt Assignment Board Connectors and Jumpers Figure A.1 Connector & Jumper Locations TopTable A.3 Connectors & Jumpers Table A.4 Connectors & Jumpers UNO-1170E RS-232 Serial Port COM1~COM2 Ethernet RJ-45 Connector LAN1~LAN2 RS-232/422/485 Serial Port COM3Power Screw Terminal CN8 PS/2 Keyboard and Mouse Connector CN10USB Connector CN13 VGA Display Connector CN15Display Memory Sata Data Connector CN17 Page Programming the Watchdog Timer Appendix B Programming the Watchdog Timer