描述
ABB TU891是ABB S800 I/O系统中的一种模块终端单元(MTU),主要用于非本质安全应用场景。以下是其详细信息:
基本信息
产品编号:3BSC840157R1
类型:紧凑型
连接方式:端子块
通道数量:8
最大额定电压:50V
最大额定电流:每通道2A
安装方式:水平安装
尺寸:宽度64mm(包括连接器),边缘到边缘安装尺寸为58.5mm,深度58mm(不包括端子)、106mm(包括端子),高度194mm(包括锁扣)
重量:0.17kg
功能特点
信号连接:具有灰色端子,用于现场信号和过程电压连接,可连接现场信号和工艺电源到I/O模块,支持实心0.2-4mm²、绞合0.2-2.5mm²(24-12AWG)的导线。
ModuleBus分配:将ModuleBus分配到I/O模块和下一个MTU,并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。
机械键控:具备机械键控功能,可防止插入错误的I/O模块。
DIN导轨安装:支持DIN导轨安装,且有锁定装置,可将MTU牢固地锁定在DIN导轨上。
环境参数
工作温度:0℃至+55℃
存储温度:-40℃至+70℃
污染等级:2级(IEC 60664-1)
相对湿度:5%至95%,无冷凝
防护等级:IP20(IEC 60529)

The ABB TU891 is a modular terminal unit(MTU)in the ABB S800 I/O system,primarily used in non-intrinsically safe applications.The following are its details:
Basic Information
Product Number:3BSC840157R1
Type:Compact
Connection Method:Terminal Block
Number of Channels:8
Maximum Rated Voltage:50V
Maximum Rated Current:2A per Channel
Mounting Method:Horizontal
Dimensions:Width 64mm(including connector),edge-to-edge mounting dimension 58.5mm,Depth 58mm(excluding terminals),Depth 106mm(including terminals),Height 194mm(including latch)
Weight:0.17kg
Features
Signal Connections:Features gray terminals for field signal and process voltage connections.They connect field signals and process power to I/O modules and accept solid 0.2-4mm²and stranded 0.2-2.5mm²(24-12AWG)wires.ModuleBus Assignment:Assigns the ModuleBus to the I/O module and the next MTU,and generates the correct address for the I/O module by shifting the output position signal to the next MTU.
Mechanical Keying:Mechanical keying prevents insertion of the wrong I/O module.
DIN Rail Mounting:Supports DIN rail mounting and features a locking mechanism to securely lock the MTU to the DIN rail.
Environmental Specifications
Operating Temperature:0°C to+55°C
Storage Temperature:-40°C to+70°C
Pollution Degree:2(IEC 60664-1)
Relative Humidity:5%to 95%,non-condensing
Protection Rating:IP20(IEC 60529)
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