Reference Manual C AD 3320 D / C AD 3121 D Version1.1
Page 21
Alarm/LED Status Indicators
The C AD 3320 D / C AD 3321 D module has built in
LED indicators that serve as alarm and status
indication for the module. Function is described
below.
The Indicators are found on the bottom of the
module and can be seen through the access holes
provided. (Figure 2)
Channel Condition Indicators
One LED is provided for each channel
LED 1 =
Channel 1
LED 2 =
Channel
2
LED 3
LED 3 = ON (GREEN): Local Control enabled
LED 3 = OFF: Local Control disabled
LED State
Indication
Green
Input and reference OK (normal)
Green Flashing
Mute is ON
Yellow Invalid
reference
or
internal
reference
Yellow Flashing
Input overload
Red Input
missing
