Instruction Manual Supplement
D104215X012
DLC3100 SIS Digital Level Controller
April 2018
6
6. Safety Instrumented System Design
Safety Instrumented System (SIS) is an implementation of one or more Safety Instrumented Functions. A SIS is
composed of any combination of sensor(s), logic solver(s), and final element(s), as shown in figure 1.
Figure 1. Example of Safety Instrumented System Components
DLC3100
SIS
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When using the DLC3100 SIS in a safety instrumented system, the following items must be reviewed and considered.
D SIL Capability
D Safety Function
D Failure Rates
D Application Limits
D Environment Limits