描述
ABB TU890 3BSC690075R1是一个模块终端单元（MTU），专门设计用于ABB S800 I/O系统。以下是其产品详情：
功能特点
提供物理连接：为现场布线提供物理连接点，是连接现场电缆（来自传感器、执行器等）的“终端点”，并为有源I/O模块分配电源和通信信号。
参与总线分配：是S800 I/O系统内部通信总线ModuleBus的组成部分，将ModuleBus分配到安装的I/O模块和机架上的下一个MTU。
生成模块地址：通过将输出位置信号转移到下一个MTU，为I/O模块生成正确的地址，确保每个模块在总线上都有唯一的地址。
确保安装正确：具有机械键控功能，可防止插入错误的I/O模块，确保正确配置并防止损坏。
支持本质安全应用：专门设计用于本质安全（IS）应用，可与适当的本质安全S800 I/O模块（如AI890、AI893、AI895、AO890、AO895、DI890、DO890）配对使用，适用于需要防爆保护的危险环境。
技术参数
端子数量：有3×9信号端子。
额定隔离电压：50V。
最大额定电压/电流：每通道50V和2A，但实际限制取决于所使用的特定I/O模块及其认证应用。
导线规格：电源连接器适用0.25-2.5 mm²（24-14 AWG）的导线；信号/现场接线适用实心0.2-4 mm²或绞合0.2-2.5 mm²（24-12 AWG）的导线。
外形尺寸：约为17 cm x 6.5 cm x 6.4 cm。
重量：约0.3 kg。
应用领域
过程自动化：如石油和天然气、化工、纸浆和造纸、采矿、金属、发电等行业。
离散制造业：适用于需要稳健可靠的I/O解决方案的领域。
危险区域应用：由于其固有的安全功能，可用于危险区域。
The ABB TU890 3BSC690075R1 is a module termination unit(MTU)specifically designed for use with the ABB S800 I/O system.Product details are as follows:
Features
Provides physical connection:It provides a physical connection point for field wiring,serves as the”termination point”for connecting field cables(from sensors,actuators,etc.),and distributes power and communication signals to active I/O modules.
Participates in bus distribution:It is a component of the ModuleBus,the internal communication bus of the S800 I/O system,distributing the ModuleBus to installed I/O modules and the next MTU in the rack.
Generates module addresses:It generates the correct address for the I/O module by transferring the output position signal to the next MTU,ensuring that each module has a unique address on the bus.
Ensures correct installation:It features a mechanical keying feature that prevents the insertion of the wrong I/O module,ensuring correct configuration and preventing damage.Support for Intrinsically Safe Applications:Designed specifically for intrinsically safe(IS)applications,it can be paired with appropriate intrinsically safe S800 I/O modules(such as the AI890,AI893,AI895,AO890,AO895,DI890,and DO890)for use in hazardous environments requiring explosion-proof protection.
Technical Parameters
Number of Contacts:3×9 signal contacts available.
Rated Isolation Voltage:50V.
Maximum Rated Voltage/Current:50V and 2A per channel,but actual limits depend on the specific I/O module used and its certified application.
Wire Sizes:The power connector accepts wires 0.25 to 2.5 mm²(24 to 14 AWG);signal/field wiring accepts solid wires 0.2 to 4 mm²or stranded wires 0.2 to 2.5 mm²(24 to 12 AWG).
Dimensions:Approximately 17 cm x 6.5 cm x 6.4 cm.
Weight:Approximately 0.3 kg.
Applications
Process Automation:Suitable for industries such as oil and gas,chemicals,pulp and paper,mining,metals,and power generation.
Discrete Manufacturing:Suitable for applications requiring robust and reliable I/O solutions.
Hazardous Area Applications:Suitable for use in hazardous areas due to its inherent safety features.
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