Product Characteristics
4.5 SCALANCE X204-2
Signaling Contact
The signaling contact is connected to a 2-pin plug-in terminal block. The signaling contact
(relay contact) is a floating switch with which error/fault states can be signaled by breaking
the contact.
Figure 4-15 SCALANCE X204-2 Signaling Contact
The following errors/faults can be signaled by the signaling contact:
• The failure of a link at a monitored port.
• The failure of one of the two redundant power supplies.
The connection or disconnection of a communication node on an unmonitored port does not
lead to an error message.
The signaling contact remains activated until the error/fault is eliminated or until the current
status is applied as the new desired status using the button.
When the device is turned off, the signaling contact is always activated (open).
4.5.7 SCALANCE X204-2 Button
What does the button do?
Using the button, you can display and modify the set fault mask.
After pressing the button, the currently valid fault mask is displayed for approximately 3
seconds. The monitored ports flash at a frequency of 5 Hz.
After 3 seconds the new fault mask is displayed. The flashing frequency is reduced to 2.5
Hz. After a further 3 seconds, the new fault mask is adopted and saved. The monitored ports
are indicated by permanently lit LEDs until the button is released.
As long as the LEDs are still flashing, the saving of the mask can be interrupted by releasing
the button.
If an empty fault mask is set (no port is monitored) or you want to set an empty mask, four 4
LEDs flash on and off alternating with their neighboring LEDs.
At the same time, you can also set the monitoring of the redundant power supply with the
fault mask. Monitoring of the power supply is activated only when both power supplies are
connected when the fault mask is saved.
The factory default is no port monitoring.
If the button is pressed longer (15 seconds), the device is reset to "factory defaults". This is
indicated by all the Port LEDs (green) flashing. During this activity, the device must not be
turned off.
Industrial Ethernet SCALANCE X-100 and SCALANCE X-200 Product Line
4-40 Commissioning Manual, 1,