Indicators
Original instructions
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Illustration
The following table shows the LED indicators for the EHC 105 module.
Description
The following table shows the LED descriptions for the EHC 105 module
LED
Color
Description
R
green
Module is READY (firmware initialization has been completed).
P
green
POWER - the US24 working voltage is present.
F
red
The red F-LED (F = fault) lights on the following faults:
  • 24 VDC supply voltage (US24) not present
  • Short circuit on one of the OUTn outputs
  • Pulse monitoring has tripped (indicate bit = 1 and ERRx = 1)
  • Counter overflow (indicate bit = 0 and ERRx = 1)
ACTIVE
green
The PLC communication becomes active.
1 to 8
green
Displays the signal states of the discrete inputs IN1...IN8.
1 to 8
green
Displays the signal states of the discrete outputs OUT1...OUT8.
C1 to C5
green
Lights with the clock frequency applied to clock-inputs 5C1 to 5C5 respectively 24C1 to 24C5.