enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. IEC 61508 - Wikipedia

   en.wikipedia.org/wiki/IEC_61508

   All phases are concerned with the safety function of the system. The standard has seven parts: Parts 1–3 contain the requirements of the standard (normative) Part 4 contains definitions; Parts 5–7 are guidelines and examples for development and thus informative. Central to the standard are the concepts of probabilistic risk for each safety ...

3. Safety instrumented system - Wikipedia

   en.wikipedia.org/wiki/Safety_instrumented_system

   In functional safety a safety instrumented system (SIS) is an engineered set of hardware and software controls which provides a protection layer that shuts down a chemical, nuclear, electrical, or mechanical system, or part of it, if a hazardous condition is detected.

4. Output signal switching device - Wikipedia

   en.wikipedia.org/wiki/Output_Signal_Switching_Device

   An output signal switching device (OSSD) is an electronic device used as part of the safety system of a machine. It provides a coded signal which, when interrupted due to a safety event, signals the machine to shut down. It works by converting the standard direct current supply, usually 24 volts, into two pulsed and out-of-phase signals.

5. Gas detector - Wikipedia

   en.wikipedia.org/wiki/Gas_detector

   The first gas detector in the industrial age was the flame safety lamp (or Davy lamp) was invented by Sir Humphry Davy (of England) in 1815 to detect the presence of methane (firedamp) in underground coal mines. The flame safety lamp consisted of an oil flame adjusted to specific height in fresh air.

6. AS-Interface - Wikipedia

   en.wikipedia.org/wiki/AS-interface

   Actuator Sensor Interface (AS-Interface or ASi) is an industrial networking solution (Physical Layer, Data access Method and Protocol) used in PLC, DCS and PC-based automation systems. It is designed for connecting simple field I/O devices (e.g. binary ON/OFF devices such as actuators, sensors, rotary encoders, analog inputs and outputs, push ...

7. Industrial control system - Wikipedia

   en.wikipedia.org/wiki/Industrial_control_system

   An industrial control system (ICS) is an electronic control system and associated instrumentation used for industrial process control.Control systems can range in size from a few modular panel-mounted controllers to large interconnected and interactive distributed control systems (DCSs) with many thousands of field connections.