The following overview shows the possible states of the IEPE inputs and provides information on the respective mode.

LED per channel

State

IEPE mode

AI mode

L26 … L33

Off

Channel not active

± (0 V … 0.3 V)

Green

± (0 V … 4.5 V)

0..90%

Within measuring range

± (0.3 V … 21.6 V)

Yellow

± (4.5 V … 5.0 V)

90 ... 100%

Out of measuring range

± (21.6 V … 24 V)

Red

Not connected or broken line (Vcc > 20 V)

Out of measuring range

Flashing red

Shorted