Digital Input - Siemens SIMATIC NET Operating Instructions Manual

5.5

Digital input

Information on the digital input
● The digital input is a floating switch. Using the digital input, you can use digital control to
● The "Bypass" LED indicates which mode the SCALANCE XC100-4OBR is in, see the
● The digital input is connected using a 2-pin plug-in terminal block (spring-loaded
● To wire up the digital input, use a copper cable of category 18-12 AWG or a cable with a
NOTICE
Damage due to voltage being too high
The digital input can be subjected to a maximum load of 10 mA (safety extra low voltage
SELV 12 VDC / 24 VDC / 48 VDC).
Position and assignment
Figure 5-3
Pin number
Pin 1
Pin 2
SCALANCE XC100-4OBR
Operating Instructions, 10/2013, C79000-G8976-C297-02
change between normal and bypass mode. The change to normal mode does not involve
any delay.
The bypass relay then only activates the digital input when the connected voltage is in the
voltage range being monitored.
The switching threshold of the digital input is at 9 V.
section ""Bypass" LED (Page 28)".
terminal). The terminal block ships with the device.
cross-section of 0.75 to 2.5 mm
Position of the digital input on the SCALANCE XC100-4OBR and the assignment of the
terminal block
Assignment
IN
M3 (ground)
.
2
Connection
5.5 Digital input
41