Auto Reset - Panasonic ST4 Series Instruction Manual

<Timing chart>
Open
Reset input
Short-circuit
Beam
received
Beam received
condition Beam
interrupted
ON
Control output
(OSSD 1 / 2)
OFF

3-2-2 Auto Reset

• The control output (OSSD 1 / 2) turns ON automatically when ST4-A□ re-
ceives the light beam.
• Back check circuit (KA, KB) are constructed between X1 and X3. When the
back check circuit (KA, KB) is not needed, short-circuit between X1 and X3.
<When the back check circuit is needed>
X1
<When the back check circuit is not needed>
X1
<Timing chart>
Beam
received
Beam received
condition Beam
interrupted
25ms or less
ON
Control output
(OSSD 1 / 2)
OFF
© Panasonic Industrial Devices SUNX Co., Ltd. 2016
25ms or less
If this device is used with the auto-reset, avoid an auto-restart of the
system after the control output (OSSD 1 / 2) is stopped by using a
safety relay unit, etc. (EN 60204-1)
100ms or more
120ms or more
KA KB
90ms or less
Functions
140ms or less
X3
X3
43