ILC 1X1
40
PHOENIX CONTACT 8385_en_02
2.14.3 24 V segment supply/24 V main supply
The segment supply and main supply must have the same reference potential. An electri-
cally isolated voltage area is not possible.
2.14.4 24 V segment supply
There are several ways of providing the segment voltage at connector 1:
1. The segment voltage can be supplied separately at terminal points 1.1 and 2.3 (GND)
(see Figure 2-23 on page 38).
2. Connections 1.1 and 2.1 (or 2.2) can be jumpered to ensure that the segment circuit is
supplied from the main circuit.
3. A switched segment circuit can be created with a switch between terminal points 1.1
and 2.1 (or 2.2).
2.14.5 24 V main voltage
2.14.6 24 V ILC supply
2.14.7 Jumpering
NOTE:
The 24 V segment supply has elements for protection against polarity reversal and tran-
sient surge voltage.
It does not have short-circuit protection.
The user must provide short-circuit protection. The rating of the fuse connected upstream
must be such that the maximum permissible load current of 8 A is not exceeded (total cur-
rent at U
M
and U
S
).
NOTE:
The 24 V main supply has elements for protection against polarity reversal and transient
surge voltage.
It does not have short-circuit protection.
The user must provide short-circuit protection. The rating of the fuse connected upstream
must be such that the maximum permissible load current of 8 A is not exceeded (total cur-
rent at U
M
and U
S
).
NOTE:
The 24 V ILC supply has elements for protection against polarity reversal and transient
surge voltage. These protective elements are only used to protect the power supply unit.
The rating of the fuse connected upstream must be such that the maximum permissible
load current of 2 A is not exceeded.
Terminals 1.3 and 2.3 on connector 1 can be jumpered if the communications power and
the segment voltage are not to be electrically isolated.
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