Siemens X-400 Digital Input Connectors, Polarity Reversal Protection X1, X1 X2

Installation and Commissioning

6.6.3Digital Input Connectors (X1)

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.

Digital inputs 1 through 4 are connected using a 5-pin connector at the front termi- nal block on the DI module.

X1

X2

IN4 IN3 M4 IN2 IN1

Figure 6-11 Pin assignment of connector X1 (Inputs 1 through 4)

Conn. 1

IN1	Digital input 1
IN2	Digital input 2
M4	Ground
IN3	Digital input 3
IN4	Digital input 4

!Warning

The input voltage must not exceed + 30 V and must not fall below – 30 V, other- wise the DI module will be destroyed.

92	Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches
	C79000-G8976-C186-03