Basic functions of the LEDs:
• LED lights up green: Link present, no data transmission
• LED ashes yellow green or lights up yellow: Link present, transmitting data
Further information about the possible states of the LEDs can be found in the following
document:
"SCALANCE X-200" Operating Instructions (https://support.industry.siemens.com/cs/document/
102051962/simatic-net%3A-industrial-ethernet-switches-scalance-x-200?dti=0&lc=en-WW)
Switching states of the emergency stop circuit
HT 10 Emergency
Stop button
Switching status, emergency stop circuit
Connected Not pressed Emergency stop circuit in the connection box remains
closed.
Connected Pressed The emergency stop circuit in the connection box is open.
The monitored system is stopped.
Not connected - The emergency stop circuit in the connection box is open.
The monitored system is stopped.
Note
The emergency stop circuit is controlled via the emergency stop button when the HT 10 is
inserted. If the connecting cable of the HT 10 is unplugged from the connection box standard,
the emergency stop circuit is interrupted. This leads to a safe machine stop or an Emergency Stop
of the monitored system.
WARNING
Danger of death resulting from the premature emergency stop unlocking
Premature unlocking of the emergency stop can lead to death, serious injury and/or machine
damage.
If you have shut down the monitored system, you can only release the emergency stop button
or put the monitored system back into operation if the conditions that tripped the emergency
stop have been eliminated and a safe restart is ensured.
Connecting
4.4 SIMATIC connection box
Handheld Terminal HT 10
Equipment Manual, 09/2020, A5E47430965B AA 33
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