产品介绍：
•接口类型：该产品采用USB至DB9M转换器，支持通用连接器作为输入或输出接口，无需跳线设置，自动实现RS-422和RS-485通信方式。
•信号定义：T/R+, T/R- 代表发射信号，RX+, RX- 代表接收信号，GND 代表公共地线。
应用领域：适用于POS机、门禁系统、自动取款机、嵌入式工控自动化系统、金融支付ATM系统、交通系统、工厂自动化和过程控制、医疗系统以及远程访问服务器等多种应用场景。
性能参数：
•兼容性：符合USB 1.0, 1.1, 2.0标准；符合EIA RS-422和EIA RS-485标准。
•USB信号：包括VCC, DATA-, DATA+, GND.FG。
•RS-422信号：包括T/R+, T/R-, RX+, RX-, GND；RS-485信号：包括T/R+, T/R-, GND。
•工作方式：RS-422支持点对多的全双工双向通信；RS-485支持点对多的半双工双向通信。
•传输距离：USB接口传输距离不超过5米，RS-422/485端传输距离可达1200米（在9600bps波特率时）。
•传输介质：支持双绞线或屏蔽线。
•负载能力：RS-422最多支持10个设备，RS-485最多支持32个设备。
•波特率：支持自动侦测，范围从300 baud至921600baud。
•流量控制：支持无流量控制、硬件流量控制以及软件XON/XOFF流量控制。
•接口保护：具备浪涌保护和±15kV静电保护。
•信号指示灯：包括发送(TXD)、接收(RXD)、电源(POWER)指示灯。
•USB连接线：带有磁环和屏蔽，可抗信号干扰。
•工作环境：适应温度范围-40°C至85°C。
支持的系统：
•Windows：XP, Vista, 7, 8, 10（32位和64位版本）；Windows Server 2003, 2008, 2012（32位和64位版本）；Windows XP Embedded。
•Windows CE：4.2, 5.0, 和 6.0版本。
•Mac OS X：支持Mac操作系统X系列。
•Linux：支持3.2及更高版本。
•Android：支持Android操作系统。
连接器和信号：
•DB9公头：提供RS-422/RS-485输出信号及接线端子引脚定义。
包装清单：
•1x USB/RS-422/485接口转换器。
•1x 驱动光盘。
•1x 说明书。
•1x 转接头。
主要通信方式：
•点到点四线全双工。
•点到多点四线全双工。
•点到点双线半双工。
•点到多点双线半双工。
•匹配电阻：当转换器作为全双工或半双工接线时，为了防止信号反射和干扰，需要在线路的终端接一个匹配电阻（参数：120欧姆1/4W）。
安装与应用：
•在安装该产品之前，请仔细阅读本产品说明书。
•将本产品的USB接口端接入电脑的USB接口端。
•把设备连接到产品的DB9M端。
<p><strong><span style=";font-family:宋体;font-weight:bold;font-size:15px;background:rgb(255,255,0);background:rgb(255,255,0)"><span style="font-family:宋体">型号：</span><span style="font-family:Calibri">IO-USB4285-02</span></span></strong></p><p><strong><span style=";font-family:宋体;font-weight:bold;font-size:16px"><span style="font-family:Calibri">1.</span></span></strong></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">问：这款乐扩</span><span style="font-family:Calibri">USB</span><span style="font-family:宋体">转</span><span style="font-family:Calibri">485/422</span><span style="font-family:宋体">转换器</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">的</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">422</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">和</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">485</span><span style="font-family:宋体">对应的孔位</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">定义和接线孔位分别是什么</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">？</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">答：产品配备</span><span style="font-family:Calibri">DB9</span><span style="font-family:宋体">转接线端，用户在使用前请仔细阅读说明书，并检查接线线序。</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">422</span><span style="font-family:宋体">对应的孔位定义为</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">1</span><span style="font-family:宋体">—</span><span style="font-family:Calibri">RXD-</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">2</span><span style="font-family:宋体">—</span><span style="font-family:Calibri">TXD+</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">3</span><span style="font-family:宋体">—</span><span style="font-family:Calibri">RXD+ </span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">4</span><span style="font-family:宋体">—</span><span style="font-family:Calibri">TXD-</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">5</span><span style="font-family:宋体">—</span><span style="font-family:Calibri">GND</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">6</span><span style="font-family:宋体">—空（</span><span style="font-family:Calibri">VCC</span><span style="font-family:宋体">本产品未用</span><span style="font-family:Calibri">)</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">485</span><span style="font-family:宋体">对应接线孔位定义为</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">1</span><span style="font-family:宋体">—空</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">2</span><span style="font-family:宋体">—</span><span style="font-family:Calibri">TX/RXD+(A)</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">3</span><span style="font-family:宋体">—空</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">4</span><span style="font-family:宋体">—</span><span style="font-family:Calibri">TX/RXD-(B)</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">5</span><span style="font-family:宋体">—</span><span style="font-family:Calibri">GND</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">6</span><span style="font-family:宋体">—空</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">注</span><span style="font-family:Calibri">:</span><span style="font-family:宋体">如果所配端子和图示不同请按</span><span style="font-family:Calibri">PCB</span><span style="font-family:宋体">丝印标识定义接线</span><span style="font-family:Calibri">.</span></span></p><p><img src="/data/upload/image/20220321/1647873014408453.png" title="1647873014408453.png" alt="图片1.png"/></p><p><span style=";font-family:宋体;font-size:14px"> </span></p><p><strong><span style=";font-family:宋体;font-weight:bold;font-size:16px"><span style="font-family:Calibri">2.</span></span></strong></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">问：乐扩</span><span style="font-family:Calibri">USB</span><span style="font-family:宋体">转</span><span style="font-family:Calibri">RS422/485</span><span style="font-family:宋体">转换器接线之后如何调试？</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">答：简单测试通讯：下载串口调试助手，打开产品对应</span><span style="font-family:Calibri">COM</span><span style="font-family:宋体">口（</span><span style="font-family:Calibri">Win7</span><span style="font-family:宋体">以上系统需要右键管理员运行调试助手软件）。</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">422</span><span style="font-family:宋体">通讯测试：用两根导线分别把</span><span style="font-family:Calibri">1</span><span style="font-family:宋体">，</span><span style="font-family:Calibri">4</span><span style="font-family:宋体">孔短接，</span><span style="font-family:Calibri">2</span><span style="font-family:宋体">，</span><span style="font-family:Calibri">3</span><span style="font-family:宋体">孔短接。发送数据后产品</span><span style="font-family:Calibri">TXD</span><span style="font-family:宋体">和</span><span style="font-family:Calibri">RXD</span><span style="font-family:宋体">指示灯会闪，并且软件接收到和发送相同的数据。测试结束，可以使用。</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">485</span><span style="font-family:宋体">通讯测试：需要两个产品或其他提供</span><span style="font-family:Calibri">485</span><span style="font-family:宋体">收发的设备。按</span><span style="font-family:Calibri">485</span><span style="font-family:宋体">定义</span><span style="font-family:Calibri">A-A</span><span style="font-family:宋体">，</span><span style="font-family:Calibri">B-B</span><span style="font-family:宋体">接好线。打开调试助手发送数据，对方接受到一致数据无误码。对方发送数据接收框显示和对方发送一致，测试结束，可以使用。</span></span></p><p><span style=";font-family:宋体;font-size:14px"> </span></p><p><strong><span style=";font-family:宋体;font-weight:bold;font-size:16px"><span style="font-family:Calibri">3.</span></span></strong></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">问：这款</span><span style="font-family:Calibri">USB</span><span style="font-family:宋体">转</span><span style="font-family:Calibri">RS422/485</span><span style="font-family:宋体">转换器在安装过程中需要注意哪些问题？</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">答：</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">大致遇到的</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">简单问题解决</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">办法</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">：</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">1.</span><span style="font-family:宋体">插上</span><span style="font-family:Calibri">USB</span><span style="font-family:宋体">无法识别：更换电脑</span><span style="font-family:Calibri">USB</span><span style="font-family:宋体">接口或换其他电脑测试。安装执行文件驱动。</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">2.</span><span style="font-family:宋体">打不开端口：</span><span style="font-family:Calibri">Win7</span><span style="font-family:宋体">以后系统，软件需要点右键以管理员身份运行。</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">3.</span><span style="font-family:宋体">接上设备无法通讯成功：检查所接设备是不是使用</span><span style="font-family:Calibri">RS422</span><span style="font-family:宋体">或</span><span style="font-family:Calibri">RS485</span><span style="font-family:宋体">协议，接线需要对应定义，</span><span style="font-family:Calibri">RS422</span><span style="font-family:宋体">收发对接，</span><span style="font-family:Calibri">RS485A-A</span><span style="font-family:宋体">，</span><span style="font-family:Calibri">B-B</span><span style="font-family:宋体">对接。测量接线良好。</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">4.</span><span style="font-family:宋体">本设备不能给外设提供电源，如果外设需要供电请另接电源适配器。</span></span></p><p><span style=";font-family:宋体;font-size:14px"> </span></p><p><strong><span style=";font-family:宋体;font-weight:bold;font-size:15px;background:rgb(255,255,0);background:rgb(255,255,0)"><span style="font-family:宋体">型号：</span><span style="font-family:Calibri">IO-U234285</span></span></strong></p><p><strong><span style=";font-family:宋体;font-weight:bold;font-size:16px"><span style="font-family:Calibri">1.</span></span></strong></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">问：</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">这款</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">乐扩</span><span style="font-family:Calibri">USB2.0</span><span style="font-family:宋体">转</span><span style="font-family:Calibri">RS232/422/485</span><span style="font-family:宋体">串口线</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">是否支持</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">协议软件选择</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">？</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">如何下载和安装驱动？</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">答：本产品支持协议软件选择。驱动和工具下载链接：</span></span></p><p><a href="http://www.mmui.com.cn/data/upload/file/EXAR1411.zip"><span style="text-decoration:underline;"><span style=";font-family:宋体;color:rgb(0,0,255);text-underline:single"><span style="font-family:Calibri">http://www.mmui.com.cn/data/upload/file/EXAR1411.zip</span></span></span></a></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">产品驱动安装，接口定义，协议修改设置部分请仔细阅读配套说明书。</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">产品插上电脑</span><span style="font-family:Calibri">USB</span><span style="font-family:宋体">接口后红色（</span><span style="font-family:Calibri">Active</span><span style="font-family:宋体">）指示灯应亮起。安装好驱动后设备管理器会增加如图红框设备（不同系统显示可能不同，以实际电脑显示为准。）</span></span></p><p><img src="/data/upload/image/20220321/1647873036153921.png" title="1647873036153921.png" alt="图片2.png"/><span style=";font-family:宋体;font-size:14px"> </span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">右键该设备可进行属性修改，</span></span><span style=";font-family:宋体;color:rgb(255,0,0);font-size:14px"><span style="font-family:宋体">注意当使用</span><span style="font-family:Calibri">RS422</span><span style="font-family:宋体">或</span><span style="font-family:Calibri">RS485</span><span style="font-family:宋体">协议时需要勾选（</span><span style="font-family:Calibri">Port Settings</span><span style="font-family:宋体">）里的</span><span style="font-family:Calibri">RS-485</span></span></p><p><img src="/data/upload/image/20220321/1647873053244983.png" title="1647873053244983.png" alt="图片3.png"/><span style=";font-family:宋体;font-size:14px"> </span></p><p><span style=";font-family:宋体;color:rgb(255,0,0);font-size:14px"><span style="font-family:宋体">注意：驱动软件请拷贝到</span><span style="font-family:Calibri">C</span><span style="font-family:宋体">盘解压。驱动软件各级目录不能出现中文字符。</span></span></p><p><span style=";font-family:宋体;font-size:14px"> </span></p><p><strong><span style=";font-family:宋体;font-weight:bold;font-size:16px"><span style="font-family:Calibri">2.</span></span></strong></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">问：</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">这款</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">乐扩</span><span style="font-family:Calibri">USB2.0</span><span style="font-family:宋体">转</span><span style="font-family:Calibri">RS232/422/485</span><span style="font-family:宋体">串口线如何进行协议设置？</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">答：使用前必须进行协议设置，打开文件夹</span>“<span style="font-family:Calibri">21B1411/Tool</span><span style="font-family:宋体">”右键“以管理员身份运行”点击“是”按钮。在端口号中选择新增加的</span><span style="font-family:Calibri">COM3</span><span style="font-family:宋体">（修改后请选择本产品对应的端口号），协议类型：</span><span style="font-family:Calibri">1.RS-232 2.RS-485 2W</span><span style="font-family:宋体">（两线</span><span style="font-family:Calibri">RS485</span><span style="font-family:宋体">协议） </span><span style="font-family:Calibri">3.RS-422/485 4W</span><span style="font-family:宋体">（</span><span style="font-family:Calibri">RS422</span><span style="font-family:宋体">或</span><span style="font-family:Calibri">4</span><span style="font-family:宋体">线</span><span style="font-family:Calibri">RS485</span><span style="font-family:宋体">协议）。</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">终端电阻：</span><span style="font-family:Calibri">RS485</span><span style="font-family:宋体">可根据现场情况设置为不使能或使能（</span><span style="font-family:Calibri">RS232</span><span style="font-family:宋体">协议设置为不使能）</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">选好后点击（应用），下面出现</span>“设置成功……”。关闭软件。即告设置完成。</span></p><p><span style=";font-family:宋体;font-size:14px"> </span></p><p><strong><span style=";font-family:宋体;font-weight:bold;font-size:16px"><span style="font-family:Calibri">3.</span></span></strong></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">问：</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">这款</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">乐扩</span><span style="font-family:Calibri">USB2.0</span><span style="font-family:宋体">转</span><span style="font-family:Calibri">RS232/422/485</span><span style="font-family:宋体">串口线</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">，</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">选择</span><span style="font-family:Calibri">RS422/485</span><span style="font-family:宋体">，或者</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">RS232</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">分别该如何设置和使用？</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">答：</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">如果选择</span><span style="font-family:Calibri">RS422/485</span><span style="font-family:宋体">模式请确认端口属性里</span><span style="font-family:Calibri">RS-485</span><span style="font-family:宋体">勾选上。</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">如果选择</span><span style="font-family:Calibri">RS232</span><span style="font-family:宋体">即可使用直接插</span><span style="font-family:Calibri">DB9G</span><span style="font-family:宋体">头进行通讯。</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">如果选择</span><span style="font-family:Calibri">RS422/485</span><span style="font-family:宋体">可使用配备的接线转换头。也可直接</span><span style="font-family:Calibri">DB9G</span><span style="font-family:宋体">和</span><span style="font-family:Calibri">DB9M</span><span style="font-family:宋体">对接（</span><span style="font-family:Calibri">DB9M</span><span style="font-family:宋体">焊线定义</span><span style="font-family:Calibri">RS422</span><span style="font-family:宋体">：</span><span style="font-family:Calibri">1 TX- 2 TX+ 3 RX+ 4 RX- 5 GND RS485</span><span style="font-family:宋体">：</span><span style="font-family:Calibri">1 DATA- 2 DATA+ 5 GND</span><span style="font-family:宋体">）</span></span></p><p><span style=";font-family:宋体;font-size:14px"> </span></p><p><strong><span style=";font-family:宋体;font-weight:bold;font-size:16px"><span style="font-family:Calibri">4.</span></span></strong></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">问：这款</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">USB2.0</span><span style="font-family:宋体">转</span><span style="font-family:Calibri">RS232/422/485</span><span style="font-family:宋体">串口线接线转换头定义</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">是什么？是否支持</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">VCC</span><span style="font-family:宋体">供电</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">？</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">答：</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">接线转换头定义见丝印标识：</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">如下图</span> </span><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">1 RXD+ 2 TXD+ 3 TXD- 4 RXD- 5 GND 6 VCC</span><span style="font-family:宋体">（注意：本产品不提供</span><span style="font-family:Calibri">VCC</span><span style="font-family:宋体">供电）。</span></span></p><p><img src="/data/upload/image/20220321/1647873080981088.png" title="1647873080981088.png" alt="图片4.png"/></p><p><span style=";font-family:宋体;font-size:14px"> </span></p><p><strong><span style=";font-family:宋体;font-weight:bold;font-size:16px"><span style="font-family:Calibri">5.</span></span></strong></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">问：这款</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:Calibri">USB2.0</span><span style="font-family:宋体">转</span><span style="font-family:Calibri">RS232/422/485</span><span style="font-family:宋体">串口线</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">的指示灯分别代表什么意思？</span></span></p><p><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">答：</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">产品指示灯（</span><span style="font-family:Calibri">TXD</span><span style="font-family:宋体">）闪表示电脑端有数据传出。</span></span></p><p style="text-indent:28px"><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">指示灯（</span><span style="font-family:Calibri">RXD</span><span style="font-family:宋体">）闪表示接的设备有数据传来。</span></span></p><p><br/></p>
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