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参数资料
| 型号： | USB-COM485-PLUS1 |
| 厂商： | FTDI, Future Technology Devices International Ltd |
| 文件页数： | 12/24页 |
| 文件大小： | 0K |
| 描述： | MOD USB RS485 CONVERTER 1 CH |
| 产品目录绘图： | USB Module Single |
| 标准包装： | 5 |
| 系列： | USB-COM-Plus |
| 类型： | USB 至 RS-485 |
| 连接器类型： | USB-B 至 DB9 |
| 产品目录页面： | 633 (CN2011-ZH PDF) |
| 其它名称： | 768-1038 USB-COM485-PLUS-1 |
Document Reference No.: FT_000132
USB-COM485-PLUS1 Datasheet
Version 1.21
Clearance No.: FTDI# 95
3
Connections
3.1 External Connectors
3.1.1 USB
The USB-COM485-Plus1 is a downstream USB 2.0 Device. A standard USB Series “B” receptacle is
reference to USB-F-1001 to facilitate connection to an upstream USB Host or Hub.
Pin Number
1
2
3
4
Shield
Pin Type
Power
Bidirectional
Bidirectional
Ground
Case Ground
Description
VBUS = USB Power provided from upstream USB Host or Hub
D – = USB data signal, negative polarity
D+ = USB data signal, positive polarity
GND = USB signal ground
Drain = typically connected to the host PC case
Table 3.1 USB "B" Receptacle Pin-Out
3.1.2 RS485
The RS485 port is configured as Data Terminal Equipment (DTE), with a 9-contact D-Sub Pin connector.
Pin assignments are according to TIA/EIA-485. In addition, pin9 of DE-9P may be assigned to provide
+5VDC to an external device with a maximum current draw of 250mA once the USB-COM485-Plus1 has
been enumerated by the system.
Pin Number
1
2
3
4
5
6
7
8
9
Pin Type
Input/Output
Input/Output
Input/Output
N/A
Ground
N/A
N/A
N/A
Power
Description
DATA- = Transmit/Receive Data, negative polarity
Pin 2 of 120R Terminating Resistor. Only Required if the USB-COM485-
PLUS1 is the first or last device in a multi-drop RS485 System, to meet
RS485 Termination Requirements.
DATA+ = Transmit/Receive Data, positive polarity
Pin 1 of 120R Terminating Resistor. Only Required if the USB-COM485-
PLUS1 is the first or last device in a multi-drop RS485 System, to meet
RS485 Termination Requirements.
N/A
GND = signal ground
N/A
N/A
N/A
provide +5VDC to an external device
Table 3.2 DE-9P RS485 Pin-Out
A 120R Resistor is connected internally between pin 1 and pin 3 of the 9 way D-type connector – see
Copyright ? 2010 Future Technology Devices International Limited
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| USB-COM485-PLUS-1 | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:COMMUNICATION DEVICES PROVIDE A SIMPLE METHOD OF ADAPTING LEGACY SERIAL DEVICES WITH RS485 INTERFACES TO MODERN USB PORTS 制造商:Future Technology Devices International (FTDI Chip) 功能描述:MODULE DEV USB-RS485 1 COM PORT 制造商:Future Technology Devices International (FTDI Chip) 功能描述:MOD, USB FS TO RS485, 1 PORT, FT232R 制造商:Future Technology Devices International (FTDI Chip) 功能描述:MODULE, USB FS TO RS485 CONV, 1 COM PORT, FT232R; ;ROHS COMPLIANT: YES |
| USB-COM485-PLUS2 | 功能描述:界面模块 USB HS to RS485 Conv Assembly 2 DB9 Ports RoHS:否 制造商:4D Systems 产品:Serial Converters 通道/端口数量: 数据速率: 接口类型:USB, UART 工作电源电压:3.3 V, 5 V 最大工作温度: |
| USB-COM485-PLUS-2 | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB TO A DUAL INTERFACE RS485 LEVEL SERIAL UART ADAPTOR 制造商:Future Technology Devices International (FTDI Chip) 功能描述:MODULE DEV USB-RS485 2 COM PORT 制造商:Future Technology Devices International (FTDI Chip) 功能描述:MOD, USB HS TO RS485, 2 CH, FT2232H 制造商:Future Technology Devices International (FTDI Chip) 功能描述:MODULE, USB HS TO RS485 CONV, 2 COM PORT, FT2232H; ;ROHS COMPLIANT: YES |
| USB-COM485-PLUS4 | 功能描述:界面模块 USB HS to RS485 Conv Assembly 4 DB9 Ports RoHS:否 制造商:4D Systems 产品:Serial Converters 通道/端口数量: 数据速率: 接口类型:USB, UART 工作电源电压:3.3 V, 5 V 最大工作温度: |
| USB-COM485-PLUS-4 | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB TO A QUAD INTERFACE RS485 LEVEL SERIAL UART ADAPTOR 制造商:Future Technology Devices International (FTDI Chip) 功能描述:MODULE DEV USB-RS485 4 COM PORT 制造商:Future Technology Devices International (FTDI Chip) 功能描述:MODULE, DEV, USB-RS485, 4 COM PORT; Kit Features:Works with USB 1.1 & 2.0 Host and Hub Ports, FIFO: 2KB Transmit Buffer, 2KB Receive Buffer; MCU Supported Families:FT232R, FT2232, FT232BM; Type:Development Module ;RoHS Compliant: Yes |
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