Phoenix Contact 2700689, User Manual, Page: 15 / 52

Mounting and installation
8289_en_04 PHOENIX CONTACT
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3.3 Installing the IP20 switch
3.3.1 Connecting the 24 V DC supply voltage
The switch is operated using a 24 V DC voltage, which is applied via COMBICON. If re-
quired, the voltage can also be supplied redundantly (see Figure 3-5 ).
Figure 3-4 Supplying the switch using one voltage source
Redundant 24 V DC supply
Figure 3-5 Supplying the switch using two voltage sources
3.3.2 Signal contact
The switch has a floating signal contact. An error is indicated when the contact is opened.
If redundant power supply monitoring is active (default setting), an error is indicated if only
one voltage is applied. A bridge between US1 and US2 prevents this error message.
OUT
24 V DC
To reset the switch on power up, the power supply must be interrupted for at least three
seconds.
OUT 24 V DC