6 Rockwell Automation Publication 440R-UM010C-EN-P - September 2016
Preface
Definitions
The Industrial Automation Glossary (publication AG-7.1) contains a glossary
of terms and abbreviations that are used by Rockwell Automation to describe
industrial automation systems. The following list of specific terms and
abbreviations that are used in this manual:
• N.C. (Normally Closed) – An electrical contact whose normal state
(that is, no pressure or electrical potential applied) is in the closed
position.
• N.O. (Normally Open) – An electrical contact whose normal state
(that is, no pressure or electrical potential applied) is in the open
position.
• Reaction Time - Describes the time between the true states of one
input to the ON state of the output.
• Recovery Time - Describes the time that is required for the input to be
in the LO state before returning to the HI state.
• Response Time - Describes the time between the trigger of one input to
the OFF state of the output.
• OSSD (Output Signal Switching Device) – A pair of solid-state
signals that are pulled up to the DC source supply. The signals are tested
for short circuits to the DC power supply, short circuits to the DC
common and shorts circuits between the two signals.
• Single Wire Safety (SWS) - A unique, safety rated signal that is sent
over one wire to indicate a safety status. The SWS can be used in
Category4.
To Next Page
Loading...
Need help?
General
