724-746-5500 | blackbox.com
Page 42
724-746-5500 | blackbox.com
Chapter 6: Operation
6. Operation6.1 LED Indicators
Hardened Serial Servers have LED indicators for Power, Serial Server Ready, Ethernet Speed and Link status, and Serial Port status.
Figures 6-1 through 6-3 show the location of the LEDs on the LES421A, LES422A, and LES424A servers.
2
3
1
4
Figure 6-1. Front and top panels of the LES421A.
Table 6-1. LEDs and switches on the LES421A serial server.
Number in Figure
6-1 LED Indicator Description
1(1) Serial Port LED (P1) The serial port has an associated LED. The Serial Port LED flashes (green) when data is being transmitted
or received on the serial po rts. When the L ED is illuminated, it ind icates the serial po rt is open.
2(1) Ready LED
The Ready LED (green) ill uminates continuously whil e the unit is initializing . It flashes once pe r 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(1) Ethernet Link LED
Lights when a connection is made.
Flashes when there is data t raffic on the Ethernet link.
4(1) Reset switch A recessed momentary Re set switch is locate d on the side of the enclosure. To activate th e switch,
insert a small plastic tool through the hole in the enclosure and press lightly.