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USB-RS485-WE Datasheet(PDF) 8 Page - Future Technology Devices International Ltd. |
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USB-RS485-WE Datasheet(HTML) 8 Page - Future Technology Devices International Ltd. |
8 / 16 page Copyright © 2010 Future Technology Devices International Limited 7 Document Reference No.: FT_000117 USB TO RS485 SERIAL CONVERTER CABLE Datasheet Version 1.4 Clearance No.: FTDI #75 5.2 USB-RS485-WE Cable Signal Descriptions Colour Name Type Description Black GND GND Device ground supply pin. Brown Terminator 1 Input Pin 1 of 120R Terminating Resistor. Only Required if the USB-RS485-WE cable is the first or last device in a multi-drop RS485 System, to meet RS485 Termination Requirements. Red POWER Output Default output is +5V when active, 0V during suspend. Power output can be customized to 0V, if required, contact FTDI Sales Team (sales1@ftdichip.com) . Switchable power to external device, 250mA max. OFF during suspend Orange Data+(A) Bi-Direction Data + (A) Signal Yellow Data-(B) Bi-Direction Data - (B) Signal Green Terminator 2 Input Pin 2 of 120R Terminating Resistor. Only Required if the USB-RS485-WE cable is the first or last device in a multi-drop RS485 System, to meet RS485 Termination Requirements. Table 5.1 USB-RS485-WE Cable Signal Descriptions 5.3 USB-RS485-WE Electrical Parameters Parameter Description Minimum Typical Maximum Units Conditions VCC_5V Output Power Voltage* 4.25 5.0* 5.25 V This only applies when cable has been configured to output 5V. The range is dependent on the USB port that the USB-RS485-WE is connected to IO Output Power Current*** - 250 mA Must be less that 2.5mA during suspend. T Operating Temperature Range -40 +85 oC Table 5.2 USB-RS485-WE I/O Operating Parameters *Default is 5V. ***Only applies when POWER output is 5V. |
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