DO810/3BSE008510R1数字量模块全自动化设备

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为满足SIS系统功能的实现，对现场仪表的挑选应尽量选择自身具有危险诊断功能和故障率较低的仪表测量设备。对于液氨球罐和浓氨水储罐的安全仪表系统安装，针对其液位测量和压力测量应选择冗余配置，实现多选一功能。
针对紧急切断功能，切断阀应尽量选择电磁阀，并尽量使用常开点，电磁切断阀采用串联冗余配置，并与过程控制系统分离控制，在出现故障时提高其可靠性。另外，SIS系统的运行过程中，软件一直在运行，并对程序控制测点进行不断的数据交换，准确的对联锁数据进行检测和干预，保证SIS系统在安全生产中稳定运行的时效性，安全性。In order to realize the function of SIS system, the instrument measuring equipment with hazard diagnosis function and low failure rate shall be selected as far as possible. For the installation of safety instrument system of liquid ammonia spherical tank and concentrated ammonia storage tank, redundant configuration shall be selected for liquid level measurement and pressure measurement to realize the function of one out of many.
For the emergency shut-off function, the solenoid valve shall be selected as far as possible and the normally open point shall be used as far as possible. The solenoid shut-off valve shall be configured in series redundancy and controlled separately from the process control system to improve its reliability in case of failure. In addition, during the operation of SIS system, the software is running all the time, and carries out continuous data exchange for program control measuring points, and accurately detects and intervenes the interlock data, so as to ensure the timeliness and safety of the stable operation of SIS system in safety production.