Specifications
Connecting
5.1 Ports
SCALANCE X-400 BA
Operating Instructions, 03/2009, C79000-G8976-C186-07
95
By inserting a strap between protective earth GND and M3, IE Switches X-400 can be
operated with grounded reference potential.
When the device ships, no strap is fitted (non-grounded reference potential).
Conn. 2 MK1 Floating signaling contact relay connector 1
M3 Ground
GND Protective earth
MK2 Floating signaling contact relay connector 2
5.1.3 Connectors of the digital inputs of the SCALANCE X414-3E
Polarity reversal protection X1, X2
The two 5-pin male connectors (X1, X2) of the digital inputs 1 through 8 have no polarity
reversal protection. If the connectors are accidentally swapped over, this does not cause
damage or destroy circuits. In display modes A and C or B and D, incorrect inputs are
displayed during the time the connectors are swapped over.
WARNING
The input voltage must not exceed + 30 V and must not fall below – 30 V, otherwise the DI
module will be destroyed.
Connectors of the digital inputs 1 to 4 on male connector X1
Digital inputs 1 through 4 are connected using a 5-pin connector at the front terminal block
on the DI module.
,1 ,1 0 ,1 ,1
Figure 5-3 Pins of connector X1 (inputs 1-4)