VG5SK8I052311 PM0N2000 GE Ethernet Control Module

Description

What is the difference between SIS safety instrument system and DCS control system? What is the relationship between SIS, DCS, ESD, and PLC? Below we will share with you the differences between interlocking in DCS and interlocking in SIS, as well as the meanings of SIS, DCS, ESD, and PLC systems.

What is the difference between interlocking in DCS and interlocking in SIS? The interlocking of DCS belongs to the commonly used switch interlocking or equipment start stop interlocking in the production process, while the interlocking of SIS is mostly related to the safety interlocking of personnel and equipment, especially the parking interlocking. The former belongs to normal operation, while the latter often belongs to fault and accident interlocking, and its SIL level is strictly determined. The two have different properties and configurations.
What is the difference in the action between interlocking in DCS and interlocking in SIS?

The SIS system is silent on a daily basis and does not initiate actions, only when triggered by interlocking.
DCS is designed to automate the production process, so operators often change some of their output actions.
What is the relationship between SIS, DCS, ESD, and PLC? What do the Chinese and English meanings of SIS, DCS, ESD, and PLC systems mean
DCS Distributed Control System;
PLC programmable logic controller;
The SIS Safety Interlock System includes:
Safety Related System (SRS)
Instrument Protective System (IPS)
Integrated Turbo&Compressor Control System – ITCC
Fire and gas systems F&G
Emergency Shutdown Device ESD
Burner Management System
High Integrity Pressure Protection System (HIPPS)
Automatic Train Protection System (ATP)

DCS is usually dynamic and used for daily production control operations.

SIS is usually static and only acts in case of an emergency, ensuring the safe retreat of the device and equipment.

Overall, they are all composed of control system hardware and software+on-site devices, with different functions. SIS has much higher requirements for software, hardware, and on-site equipment than DCS. Both SIS and DCS belong to the control system, and there is no essential difference in system structure. The relationship between DCS and SIS is complementary.