SIS safety instrument system has good response speed, and its response time is generally 10~50ms

The sis safety instrument system is mainly used for the alarm part of the plant control system. It is an important part to alarm or shut down according to the detection results of the system. It has many features, wide coverage, high security, good prevention of potential hazards, and good fault-tolerance ability. It is widely used in various industrial fields. Now let’s introduce some features of sis safety instrument system.

SIS has the following features:

(1) Based on IEC61508, it complies with the instrument safety standards specified by the International Safety Association.
(2) It has a wide coverage, high safety, self-diagnosis function, and can detect and prevent potential hazards.
(3) For fault-tolerant multi-redundancy system, SIS generally adopts multi-redundancy structure to improve the hardware fault margin of the system. A single fault will not cause the loss of SIS safety function.
(4) The application program is easy to modify, and the software can be modified according to actual needs.
(5) The self-diagnosis coverage is large, and the number of points that need to be checked by workers during maintenance is relatively small.
(6) Fast response. The response time from input change to output change is generally about 10-50ms, and the response time of some small SIS is shorter.
(7) It can realize the full circuit safety design from sensor to actuator, with I/O short circuit, broken wire and other monitoring functions.