The FIELDVUE^® DVC6000 SIS digital valve controller is a communicating, microprocessor-based digital-to pneumatic valve-mounted instrument. The controller can be used on single- or double-acting actuators. Safety Instrumented Systems (SIS) are specifically designed to reduce the likelihood, or the severity of the impact of an identified event, thus helping to protect personnel, equipment, and the environment. These systems involve final control elements, which are mostly in one position and are requested to move only when an emergency situations arises. Typical applications with Safety Instrumented Systems involve Emergency Shutdown Valves, Emergency Blow Down Valves, Emergency Venting Valves, Emergency Isolation Valves, Critical On-Off Valves, etc.