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Functions
Panasonic ST4 Instruction Manual
52
ST4-A
□
receives the light beam.
3.2.2 Auto
Reset
!
DANGER!
If the auto-reset function is used and the control output (OSSD
1/2) is stopped, ensure that nothing else, such as a safety relay
unit, executes an auto-restart of the system (EN 60204-1).
For automatic reset, keep the following aspects in mind:
•
The control output (OSSD 1/2) turns on automatically when ST4-A
□
receives the light
beam.
25ms or less
90ms or less
Reception
status
ON
OFF
Beam
received
Beam
interrupted
Control output
(OSSD 1 / 2)
100ms or more
•
The back check circuit (KA, KB) is constructed between X1 and X3. When the back
check circuit (KA, KB) is not needed, short-circuit between X1 and X3.
X1
KA
KB
X3
X1
X3
When the back check circuit is required
When the back check circuit is not required
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