6
Rockwell Automation Publication 440G-UM001C-EN-P - June 2019
Preface
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Terminology
The
Industrial Automation Glossary
contains terms and abbreviations used by
Rockwell Automation to describe industrial automation systems. Below is a list
of specific terms and abbreviations used in this manual.
NC
No connection
N.C. (Normally
Closed)
An electrical contact whose normal state (for example,
no pressure or electrical potential applied) is in the
closed position.
N.O. (Normally
Open)
An electrical contact whose normal state (i.e., no
pressure or electrical potential applied) is in the open
position.
PLC
A programmable logic controller or a programmable
automation controller.
PTL (Power to
Lock)
Apply 24V to the lock command to lock the switch. This
command applies to the 440G-LZ switch.
PTL (Power to
Release)
Apply 24V to the lock command to unlock the switch.
This command applies to the 440G-LZ switch.
Reaction Time
Describes the time between the true state of the input to
the ON state of the output.
Response Time
Describes the time between the trigger of the input to
the OFF state of the output. Throughout this manual,
the safety outputs may be described as turning off
immediately. This means that the safety outputs will
turn off within the response time.
RFID
Radio frequency identification.
OSSD (Output
Signal
Switching
Device)
Typically a pair of solid-state signals pulled up to the DC
source supply. The signals are usually tested for short
circuits to the DC power supply, short circuits to the
DC common, and short circuits between the two
signals.
Standard
coding
Same as Low coding as defined in
EN IS
O
14119:2013
440G-LZL
440G-LZ power-to-lock guard locking switch
440G-LZR
440G-LZ power-to-release guard locking switch
Unique coding
Same as High coding as defined in
EN I
SO
14119:2013
