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Rockwell Automation Publication 450L-UM001F-EN-P - March 2022
25
Chapter
4
Safety Function
The 450L safety light curtain offers a range of functions that are integral to the
safety system. The functions are selected through DIP switch settings on the
receiver plug-in.
A confirmation of a new configuration at the receiver stick is only required if
the stick was previously operated with another DIP switch setting or with
another plug-in type (see
Confirmation of a New System Configuration on
A confirmation of a new configuration at the transmitter stick is only required
if the stick was previously operated with another beam coding (see
Some safety functions can only be selected with the 450L-E safety light curtain.
A complete overview is provided in
Start Modes
The four start modes are configurable for all GuardShield™ product lines (450L
PAC and both 450L-B and 450L-E POC safety light curtain product lines).
Manual reset options are only provided for 8-pin connection plug-ins. 5-pin
plug-ins have only the automatic (re)start option.
Automatic (Re) Start (Default)
When in the automatic start mode of operation (also known as Guard only
mode), the light curtain operates as an on/off device. The OSSD outputs switch
off, according to an interruption of the sensing field, and automatically switch
on when the protective field is cleared. The GuardShield pairs that are
equipped with bottom plug-ins and factory-default DIP switch settings work
in Automatic Start mode.
ATTENTION:
The protective system must be tested for proper operation after
each change to the configuration.
IMPORTANT
The Start button can also be used to power cycle a receiver stick if
there is a lockout. A receiver stick performs the power off/on cycle if
the input of the Start button is activated for a minimum of 10 seconds,
but not longer than 20 seconds. This function is also available if
automatic start is configured for receiver plug-ins, which allow a start
mode selection, see
for additional installation
hints.