Status LEDs at the signal connections

LED displays

LED

Display

Meaning

STATUS 1-4

green illuminated

a signal (24 V) is present on at least one input of channels 1-6 or one of the outputs 1 or 2 is switched on

Us

off

The supply voltage, Us, is not present

green illuminated

The supply voltage, Us, is present

red illuminated

short circuit on the power supply for sensor outputs of Us

Up

off

The supply voltage, Up, is not present

green illuminated

The supply voltage, Up, is present