描述
ABB DI821是一款8通道的230V AC/DC数字量输入模块，属于S800 I/O系列，部件编号为3BSE008550R1。以下是其产品详情：
技术参数
输入通道数：8通道。
输入电压范围：AC 164-264V，DC 175-275V。
输入电流：AC 230V时为11mA，DC 220V时为1.6mA。
输入阻抗：AC 21kΩ，DC 134kΩ。
隔离情况：输入通道相互独立隔离。
额定绝缘电压：250V。
介电测试电压：2000V AC。
模拟滤波器：6ms。
信号过滤：数字滤波时间可选，有2ms、4ms、8ms、16ms。
功耗：典型值2.8W。
工作温度范围：0-55℃。
存储温度范围：-40-70℃。
防护等级：IP20。
产品特点
电压监控功能：通道1可以作为通道2-4的电压监控输入，通道8可以作为通道5-7的电压监控输入。当监控通道的电压消失时，错误输入被激活，警告LED亮起，且错误信号可以从模块总线读取。
高可靠性：每个输入通道都包括限流组件、EMC保护组件、输入状态指示LED、光隔离屏障，增强了抗干扰能力和运行的稳定性。
The ABB DI821 is an 8-channel,230V AC/DC digital input module from the S800 I/O series,part number 3BSE008550R1.The following are product details:
Technical Specifications
Number of Input Channels:8.
Input Voltage Range:AC 164-264V,DC 175-275V.
Input Current:11mA at AC 230V,1.6mA at DC 220V.
Input Impedance:AC 21kΩ,DC 134kΩ.
Isolation:Input channels are independently isolated from each other.
Rated Insulation Voltage:250V.
Dielectric Test Voltage:2000V AC.
Analog Filter:6ms.
Signal Filtering:Digital filter times are selectable:2ms,4ms,8ms,and 16ms.
Power Consumption:Typical 2.8W.Operating Temperature Range:0-55°C.
Storage Temperature Range:-40-70°C.
Protection Rating:IP20.
Features
Voltage Monitoring Function:Channel 1 can function as a voltage monitoring input for channels 2-4,and channel 8 can function as a voltage monitoring input for channels 5-7.When the voltage in the monitored channel disappears,the error input activates,the warning LED illuminates,and the error signal can be read from the module bus.
High Reliability:Each input channel includes current limiting components,EMC protection components,an input status indicator LED,and an optical isolation barrier,enhancing interference immunity and operational stability.
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