Black Box LES422A, LES421A manual Front panel of the LES424A LEDs on the LES424A serial server

Chapter 6: Operation

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Figure 6-3. Front panel of the LES424A.

Table 6-3. LEDs on the LES424A serial server.

Number in Figure
6-3	LED Indicator	Description
1	(1) Power LED	The Power LED illuminates when 10 to 58 VDC power is applied to either power connector.
2	(1) Ready LED	The Ready LED (green) illuminates continuously while the unit is initializing. It flashes once per second
		when the system is operating correctly. If the LED is not flashing, it indicates that something is wrong
		(e.g. another device on the network at the same IP address).
3	(2) Ethernet Speed LEDs	Lights green when the Ethernet connection is operating at 100 Mbps.
		Off when the connection is operating at 10 Mbps.
4	(2) Ethernet Link LEDs	Lights when a connection is made.
		Flashes when there is data traffic on the Ethernet link.
5	(4) Serial Port LEDs (P1, P2, P3, and P4)	Each serial port has an associated LED. Serial Port LEDs flash (green) when data is being transmitted or
		received on the serial ports. When the LED is illuminated, it indicates the serial port is open.
6	(1) Reset switch	A recessed momentary Reset switch is located on the side of the enclosure. To activate the switch,
		insert a small plastic tool through the hole in the enclosure and press lightly.

NOTE: LEDs on the Hardened Serial Server are also used to indicate various Reset modes, as described in the following section.

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