ABB DSAI110 57120001-DP模拟输入板
•MAIN/ALT 4 mA VALUE（主/备用4 mA值）：该信息显示在每个模拟输入上，允许用户分配一个数值，该数值对应于4至20 mA信号范围的4 mA端。•MAIN/ALT 20 mA VALUE（主/备用20 mA值）：此消息显示在每个模拟输入上，允许用户分配一个数值，该数值对应于4至20 mA信号范围的20 mA端。•模拟输入MAIN/ALT继电器：模拟输入MAIN和ALT检测可以禁用，用作报警或过程控制。如果不需要此功能，则将此设置点设置为OFF。选择ALARM（报警）可激活报警继电器，并在MAIN（主）或ALT（高度）模拟输入条件存在时显示报警信息。选择辅助继电器会激活所选辅助继电器，但不会显示任何信息。用于过程控制
• MAIN/ALT 4 mA VALUE: This message appears for each analog input and allows the user to assign a numeric value which corresponds to the 4 mA end of the 4 to 20 mA signal range. • MAIN/ALT 20 mA VALUE: This message appears for each analog input and allows the user to assign a numeric value which corresponds to the 20 mA end of the 4 to 20 mA signal range. • ANALOG IN MAIN/ALT RELAY: Analog input MAIN and ALT detection can either be disabled, used as an alarm or as a process control. Set this setpoint to OFF if the feature is not required. Selecting ALARM causes the alarm relay to activate and displays an alarm message whenever a MAIN or ALT analog input condition exists. Selecting an AUXILIARY relay causes the selected auxiliary relay to activate with no message displayed. This is intended for process control
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