描述
ABB TU851是ABB S800 I/O系统中的扩展模块终端单元（MTU），主要用于实现信号终端的高效连接与管理。以下是其详细信息：
基本信息
产品编号：3BSE068782R1
类型：扩展型
连接方式：端子块
通道数量：16个
最大额定电压：250V
最大额定电流：每通道3A
安装方式：可双向安装在标准DIN导轨上
尺寸：宽度126mm（包括连接器），深度64mm，高度110mm
重量：0.22kg
功能特点
信号通道：支持多达16个隔离的现场信号通道，可有效防止信号干扰。
ModuleBus分配：将ModuleBus分配到I/O模块和下一个MTU，同时通过将输出位置信号移位到下一个MTU来为I/O模块生成正确的地址。
机械钥匙配置：使用两个机械钥匙为不同类型的I/O模块配置MTU，共有36种不同的配置组合，防止错误插入I/O模块。
DIN导轨锁定：具有锁定装置，可将MTU牢固地锁定在DIN导轨上，并提供接地功能。
电气参数
介电测试电压：2000V a.c.
可接受的电线尺寸：实心线0.2-4mm²，绞线0.2-4mm²，24-10AWG
The ABB TU851 is an expansion module terminal unit(MTU)in the ABB S800 I/O system,primarily designed for efficient signal terminal connection and management.The following are its details:
Basic Information
Product Number:3BSE068782R1
Type:Expansion Type
Connection Method:Terminal Block
Number of Channels:16
Maximum Rated Voltage:250V
Maximum Rated Current:3A per Channel
Mounting Method:Bidirectionally mountable on a standard DIN rail
Dimensions:Width 126mm(including connector),Depth 64mm,Height 110mm
Weight:0.22kg
Features
Signal Channels:Supports up to 16 isolated field signal channels,effectively preventing signal interference.
ModuleBus Assignment:Assigns the ModuleBus to the I/O module and the next MTU,while also generating the correct address for the I/O module by shifting the output position signal to the next MTU.
Mechanical Key Configuration:Use two mechanical keys to configure the MTU for different I/O module types,with 36 different configuration combinations available,preventing incorrect I/O module insertion.
DIN Rail Lock:A locking mechanism securely locks the MTU to the DIN rail and provides grounding functionality.
Electrical Parameters
Dielectric Test Voltage:2000V AC
Acceptable Wire Sizes:Solid 0.2-4mm²,Stranded 0.2-4mm²,24-10AWG
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