Siemens SIMATIC ET 200X - LED on SITOP Power; Status and Error Displays by Means of Leds on SITOP Power

Commissioning and Diagnostics
5-19
ET 200X Distributed I/O Device
EWA 4NEB 780601602-06
5.3.5 LED on SITOP power
Table 5-9 Status and error displays by means of LEDs on SITOP power
24 VDC (24 V at output terminals): green
ELECTRONIC/SENSOR 1L+ (supply voltage for electronic components/sensors): green
LOAD 2L+ (load voltage supply): green
TEMP > (temperature rise): red
LEDs Meaning Action
24 VDC ELECTRONIC/
SENSOR 1L+
LOAD 2L+ TEMP >
Off Off Off *  No supply voltage
 Short circuit at
output
1)
 Switch on the
mains voltage.
 Repair the short
circuit.
Flash. Flash. Flash. *  Overload in
RESTART mode
 Short circuit at
output
1)
 Check the current
consumption and
reduce, if
appropriate, the
number of modules
(see Section 2.7)
 Repair the short
circuit.
On * * *  24 V is applied to
the output
terminals.
–
* On On *  Associated bus
segment is
supplied with 24 V
–
* * * Flash.  Switch off as
maximum
temperature
exceeded
 Check
environmental and
load conditions
* Not applicable
1) Depends on parameterized short-circuit response