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串口服务器


摘要:本文介绍了串口联网服务器的定义、外观、由来、应用领域、使用方法和相关产品

什么是串口服务器

串口服务器又叫做串口联网服务器、以太网串口转换器、串口通讯服务器、串口设备联网服务器、终端联网服务器、TCP/IP转换器等,是一种网络通讯接口转换设备,实现工业上常用的RS232、RS485、RS422等串行通讯方式转换成TCP/IP网络接口,并实现双向数据透明传输。利用串口服务器,用户不需要具体的网络知识就可以轻松的将单片机、串口设备联网,从而实现远程数据采集、远程控制等智能化系统的搭建。

串口服务器分为:单串口服务器和多串口服务器。

串口服务器的由来

对于串口服务器,两个关键词是串口和网络。网络分为内网和外网两种,内网一般指以太网,外网指Internet,它是进行全球范围内通信的有效手段。在网络盛行之前,设备与计算机之间一般通过简单的RS232来实现数据的交换;如果需要远距离传输也可以采用RS485(最长1000多米)。随着网络和现代信息技术的发展,对设备的几种需求逐渐提出来:

1.某些应用需要对分布于世界各地的设备进行远距离监控。

2.像机房监控、自助银行系统通信、办公楼自动控制系统等应用中,本身已经有完整的网络布线,能否利用这些已有的网络设施实现设备的通信。

3.对于RS232接口,PC机的一个串口只能够接一台串口设备,如果需要连接多个设备,原来的串口方案将不易于扩展,而网络则没有该问题。

由于以上原因,需要将设备连接到网络上。但是已经有成千上万原有的串口设备已存在,对这些设备的大批量改造显然不是一蹴而就的,这样作为暂时的解决方案——将串口转化为网口的串口联网服务器就应运而生了。

串口服务器选型

工业级串口服务器 型号 串口形式 芯片方案 简介特征
串口服务器-串口转以太网-RS232转以太网-485转以太网-串口转网口

双串口服务器

USR-TCP232-410s
RS232+RS485 TI方案,Cortex-M4处理器 双串口同时工作,互不干扰
四串口服务器 多路串口服务器 RS232/485/422串口转以太网转换器

四串口服务器

USR-N540
4*RS232/485/422 TI方案,Cortex-M4处理器 四串口、多模式工作互不干扰
双串口服务器_RS232/485/422转以太网

双串口服务器

USR-N520
2*RS232/485/422 TI方案,Cortex-M4处理器 双串口同时工作,互不干扰
RS232/RS485/RS422单串口服务器_工业级设计_看门狗硬件保护

单串口服务器

USR-N510
1*RS232/485/422 TI方案,Cortex-M4处理器 单串口、多模式串口灵活切换
工业级八串口服务器_机架式RS232/485/422串口转以太网联网服务器设备

八串口服务器

USR-N668
8*RS232/485/422 ARM9芯片方案 双LAN口,可实现手拉手,AC 85~265V
低成本串口服务器 型号 串口形式 工作电压 简介特征
RJ45转RS232/485/422 单串口服务器 数据透传设备

单串口服务器

USR-TCP232-306
1*RS232/485/422 DC 5~36V 3串口可选,虚拟串口,同步波特率,工作温度-25~75℃
小体积_RS485转网络_串口设备联网服务器_以太网转串口模块_双向透明传输

单串口服务器

USR-TCP232-304
1*RS485 DC 5~7V 内置网页,虚拟串口,注册包,心跳包,工作温度-25~75℃
小体积 串口设备联网服务器 网络转RS232 以太网

单串口服务器

USR-TCP232-302
1*RS232 DC 5~7V 内置网页,虚拟串口,注册包,心跳包,工作温度-25~75℃
WIFI串口服务器 型号 串口形式 网口形式 简介特征
RS232/485双网口WIFI串口服务器_AT+STA模式_防浪涌|防静电过|流保护

双网口Wi-Fi串口服务器

USR-W630
1*RS232/RS485 2*WAN/LAN Modbus TCP与RTU互转、轮询,AP/STA/AP+STA,工作温度-20℃~70℃
高性价比带网口的WIFI串口服务器_RS485/RS232转RJ45网口_串口转wifi模块

单网口WIFI串口服务器

USR-W610
1*RS232/RS485 1*WAN/LAN Modbus TCP与RTU互转、轮询,AP/STA/AP+STA,工作温度-40℃~ 85℃
低成本WIFI串口服务器_RS232/485转RJ45_串口转wifi模块

低成本WIFI串口服务器

USR-W600
1*RS232/RS485 无网口 电源防反接,AP/STA/AP+STA,工作温度-20℃~85℃
CAN转以太网服务器 型号 串口形式 CAN口形式 简介特征
CAN转以太网服务器_以太网转CAN_CAN转TCPIP_CAN转RJ45

CAN转以太网服务器

USR-CANET200
1*RS485 2*CAN口 CAN/以太网/RS485互转,工业级设计,两路Socket,CAN中继

串口服务器应用领域

串口联网服务器目前应用于:

物联网、公共安防、工业自动化、智能家居、电力控制、环境监测、智能农业、门禁考勤系统、POS系统、售饭系统、楼宇自动化系统、电力监控、自助银行系统、电信机房监控等。

串口服务器使用方法

应用框图如下图所示

网络转串口模块工作模式

TCPIP转RS232模块应用框图

RJ45转TTL模块

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