Siemens X-400 Ports, Power Supply Connectors, Polarity Reversal Protection, X1 X2

Installation and Commissioning

6.6Ports

6.6.1Power Supply Connectors (X1)

Polarity Reversal Protection X1, X2

The two 4-pin male connectors (X1, X2) for the power supply and the signaling contact have no polarity reversal protection. If the connectors are accidentally swapped over, this does not cause damage or destroy circuits. Normal functionality is, however, not available while the connectors are swapped over.

The redundant power supply is connected over a 4-pin connector at the front ter- minal block on the power module.

X1

X2

L2 M2 M1 L1

Figure 6-9 Pin assignment of connector X1

Conn. 1	L1+	+ 24 V power supply 1
	M1	Ground
	M2	Ground
	L2+	+ 24 V power supply 2

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