B&B Electronics UNO-2170 user manual

Page 17

2.3.6RS-485 Auto Flow Control Mode and RS-422 Master/Slave Mode Selection

You can set the “Auto Flow Control mode of RS-485 or “Master/Slave＂ mode

of RS-422 by using the SW3 DIP switch for each RS-422/485 port. In RS-485, if the switch is set to “Auto＂ the driver automatically senses the direction of

the data flow and switches the direction of transmission. No handshaking is necessary.

In RS-422, if DIP switch is set to “On＂, the driver is always enabled, and always in high or low status.

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Chapter2

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Contents UNO-2170 Support Product Warranty Page Contents Appendix Appendix Programming the Watchdog TimerSystem Settings and Pin Assignments Overview Introduction Relative humidity 95% @ 40C Weight 1.6 kg Hardware SpecificationsAlways ground yourself to remove any static electric Safety PrecautionsChassis Dimensions Chassis DimensionsPage Hardware Functionality Front panel of UNO-2170 RS-232 Interface COM1~COM21 16C550 UARTs with 16-byte standard RS-232/422/485 Interface COM3~COM42 RS-422/485 detection Automatic Data Flow Control Function for RS-4855 RS-232/422/485 Selection RS-422/485 jumper settingPage Vector address for share IRQ 1D0H IRQ and Address SettingPower Connector LAN Ethernet ConnectorPS/2 Keyboard and Mouse Connector USB ConnectorPcmcia PC Card Slot VGA Display ConnectorLithium Battery Specification Battery Backup SramReset Button Page Initial Setup Chassis Grounding Inserting a CompactFlash CardBios Setup and System Assignments Connecting PowerInstalling a Hard Disk Page System Settings Pin Assignments 1SystemI/OAddressandInterruptAssignment Appendix a System Settings and Pin AssignmentsTable A.2 UNO-2170 Interrupt Assignment Figure A.2 UNO-2170 connector and jumper locations back-side Board Connectors and JumpersTable A.3 UNO-2170 Connectors and Jumpers RS-232 Standard Serial Port COM1~COM2 RS-232/422/485 Serial Port COM3~COM4 Ethernet RJ-45 Connector LAN1~LAN2Phoenix Power Connector PWR USB Connector USB1~USB2 Page Programming Watchdog Timer Appendix B Programming the Watchdog Timer AppendixB