12
Major Operating Controls and Their Functions
LINK
RCV
SND
OPERATE
Network Interface Unit WJ-NT304
WJ-NT304
w
q
Front cover
e
u
y
r
t
q
Operation Indicator (OPERATE)
This LED will light when the power is on.
Important:
• The LED will blink for around 2 minutes until the unit
becomes ready to operate.
• When the temperature is below 0 °C, it may take
time until the unit becomes ready to operate.
w
Status indicators
Link (LINK):
This LED will light when accessing to a
network.
Receive (RCV):
This LED will light when receiving data
through this port.
Send (SND):
This LED will light when sending data
through this port.
e
Reset button (RESET)
This button is pressed to reset the unit.
r
Dip switch
Normally, do not touch. (Reserved for service person-
nel)
Remain all the switches to OFF. (Refer to the illustra-
tion.)
t
SD memory card slot
An SD memory card (option) is inserted into this slot.
Refer to p. 16 for how to insert the SD memory card.
y
SD memory card error indicator
This LED will light when it is impossible to write data on
the SD memory card.
u
Serial port (SERIAL)
Normally, do not touch. (Reserved for service person-
nel) Do not connect anything.
■
Front view
（
ON
）
（
OFF
）
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