Siemens X-400 - Manual (Page 111)

Installation and Commissioning
Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches
C79000-G8976-C186-03
111
6.8.4 LED Display - DI Module
LED Display of the Digital Inputs 1 through 8
The status of four digital inputs (IN1 through IN4 or IN5 through IN8) can be indi-
cated by the four LEDs on the front panel of the DI module.
F
L 1
L 2
P o w e r M o d u l e L E D s P o r t - L E D s
P 1
P 2
C P U - L E D s
R M
S T B Y
D M 1
D M 2
D I - L E D s
I N 1 / I N 5
I N 2 / I N 6
I N 3 / I N 7
I N 4 / I N 8
Figure 6-27 LEDs of the digital inputs and display modes
Four modes (display mode A through D) are available and these are displayed by
two LEDs (DM1, DM2) on the Switch CPU. The display modes A and C are identi-
cal as are modes B and D.
Mode DM1 DM2 IN1/5 IN2/6 IN3/7 IN4/8 Meaning
DMode A
DMode C
off off Digital
inputs
IN1 through IN4
on Signal at input IN1
on Signal at input IN2
on Signal at input IN3
on Signal at input IN4
Mode DM1 DM2 IN1/5 IN2/6 IN3/7 IN4/8 Meaning
DMode B
DMode D
on off Digital
inputs
IN5 through IN8
on Signal at input IN5
on Signal at input IN6
on Signal at input IN7
on Signal at input IN8