Peakanalyzer Installation Manual Version 2.6
9
1.13 Fuses and wire sizes
The power supply input of the Peakanalyzer is equipped with a fine wire fuse 2 A T / 250V
AC
.
The 230 V
AC
wire must have a size that is suitable for the maximum current of the fine wire
fuse. The breaking capacity of the supplied fine wire fuse has an amount of 1500 A. If the
current is above 1500 A there is a danger of a permanent lighting bow over the contacts of the
fine wire fuse. This can lead to a fire in the power supply unit. Furthermore the fuse body can
be destroyed.
If the Peakanalyzer operates on a 230 V
AC
voltage where the maximum current between L and
N is limited to 1500 A, this danger is not existent. This is the normal case. If the maximum
current of the 230 V
AC
voltage input is above 1500 A, the user has to apply an additional fuse
of the electrical circuit to reduce the maximum current to 1500 A or below between N and L
wire.
The 24 V
DC
supply voltage of the E-Bus supplies the individual terminals with the required
operating voltage to drive the EtherCAT system bus. The current through these input voltage
clamps must be limited to 2 A. If the power supply source has a greater output current than 2
A, each +24V branch of the E-Bus supply must be protected by a 2 A T fine wire fuse. The
fused wire sizes must be designed to at least 3 A current.
The 24 V
DC
supply voltage of the power contacts for external sensors is available at the clamps
with a black + on red ground and black - on blue ground. These clamps allow a maximum
current of 10 A. If the power supply source delivers more than 10 A, the input source has to be
protected by a separate fuse of 10 A. If the power supply source delivers a current of 10 A or
less, the additional fuse can be omitted. In all cases the wire size must have at least a cross
section of 1.5 mm². In most cases a power supply source with 2.5 A or 3 A is sufficient. This
than serves as fuse for the power contacts.
If there are external sensors used that are not supplied by GfM it is recommended to
additionally protect the + branch by a fine wire fuse. This fuse should have an amount of 3
times of the nominal current but a maximum of 2 A T. An example is shown in Picture 11.