RFC 4072S
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PHOENIX CONTACT 108580_en_02
3.8 Connecting the supply voltage
The RFC 4072S is operated using 24 V DC voltage.
The RFC is supplied from an external power supply (24.0 V DC). The permissible voltage
ranges from 19.2 V DC to 30.0 V DC (ripple included).
Figure 3-6 Connecting the supply voltage
WARNING: Loss of electrical safety and the safety function when using unsuitable
power supplies
The RFC 4072S is designed exclusively for protective extra-low voltage (PELV) operation
in accordance with EN 60204-1. Only PELV in accordance with the listed standard may
be used for the supply.
The following applies to the PROFINET network and the I/O devices used in it:
Only use power supplies that meet EN 61204 and feature safe isolation and PELV accord-
ing to EN 50178/VDE 0160 (PELV). These prevent short circuits between primary and
secondary sides.
Please also observe the information in Section “Electrical safety” on page 15.
Please note that the RFC 4072S requires approximately two minutes to start up. This is
due to the comprehensive selftests the device must perform. The status is indicated on
the display.
2
4
V
D
C
+
-
24 V DC
0V
FE
107586A006
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