PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN
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All parameters are specified at 24Vdc input voltage, 8x5A output currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
3.
Typical Wiring Scheme
One fuse module is suitable to distribute the current to 8 consumers. If there are more than eight consumers, up to eight
fuse modules can be used (64 consumers). The supply of the individual fuse modules can be done by means of power-bus-
bars, which are available as accessory parts. The supply of the 24V is then only done by one fuse module, preferably in
the middle, because the current is then better distributed in both directions and the permissible current of the power-bus-
bar of 32A is not exceeded.
Fuse modules can be lined up on the DIN rail without spacing. The power-bus-bars can be plugged in from the front and
must have a length that all plug contacts of the modules make a contact.
The (+) pole terminals of the loads must be connected to the outputs of the fuse module. The fuse module also has a
distribution for the (-) pole connection. This internal distribution can be used and reduces the wiring effort. However, an
external distribution of the (-) pole connection may also be used, as shown in Fig. 3-2.
The channel 1 and 2 are optimized for loads with large input capacitances. Connect such loads to these channels to avoid
a false tripping or unexpected switch-off of these channels.
Fig. 3-1: Typical wiring scheme for one fuse module (8 loads)
Fig. 3-2: Typical wiring scheme utilizing an external
distribution terminal for the negative pole
Fig. 3-3: Typical wiring scheme for multiple modules
