Datcon DT4120 Series Operating Instructions Manual page 27

DT4120 xx xx (PS)
20170324-V0
indicators
The following figure shows the 3 yellow indicator on the left
side of DT4120 xx xx (PS) front panel:
(1) Rel 1: limit output indicator (yellow)
indicates that the limit output 1 is in "on-state" (LIMIT1).
(2) Rel 2: limit output indicator (yellow)
indicates that the limit output 1 is in "on-state" (LIMIT2).
(3) Status: Communication status indicator (yellow)
The indicator gives light for 0.1 sec when a succesfull data
exchange has granted through the communication output.
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