Protection modules

The innovative and low-cost PISA protection modules with DIN rail mounting are designed for current distribution and protection of 24V load circuits.


Complementary units for power supplies

Cost effective protection

The PISA protection module distributes the current of a large power source to multiple lower current output channels and therefore allows for smaller wires to be used. Furthermore, it permits only so much current on the output so the input voltage of the unit (which corresponds to the output voltage of the power supply) does not fall below 21V typically.

This ensures a reliable supply voltage for sensitive equipments, such as PLCs, controls or sensors, when they are connected directly to the same power supply as the PISA protection module.

Less critical loads, that are not affected by short voltage interruptions or could even cause a fault on the 24V power supply, are connected to one of the four current controlled output channels of the PISA module. The protection is independent of the length of the wires or of the power supplies‘ characteristics.

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Learn how you can use a PISA11.CLASS2 protection module to replace several individual NEC Class 2 power supplies by one large and more cost-effective power supply.

Designing NEC Class 2 circuits with the PISA11 protection module

Protection module

 
Article Number
DC Output Input Dimension
WxHxD (mm)
Special Feature
PISA11.401 24V 4A DC 18V-30V 45 75 91 4-channel protection module; Outputs: 4x1A
PISA11.402 24V 8A DC 18V-30V 45 75 91 4-channel protection module; Outputs: 4x2A
PISA11.403 24V 12A DC 18V-30V 45 75 91 4-channel protection module; Outputs: 4x3A
PISA11.404 24V 16A DC 18V-30V 45 75 91 4-channel protection module; Outputs: 4x4A
PISA11.406 24V 20A DC 18V-30V 45 75 91 4-channel protection module; Outputs: 4x6A
PISA11.410 24V 20A DC 18V-30V 45 75 91 4-channel protection module; Outputs: 4x10A
PISA11.203206 24V 18A DC 18V-30V 45 75 91 4-channel protection module; Outputs: 2x3A and 2x6A
PISA11.206212 24V 20A DC 18V-30V 45 75 91 4-channel protection module; Outputs: 2x6A and 2x12A
PISA11.CLASS2 24V 14.8A DC 18V-30V 45 75 91 4-channel protection module; Outputs: 4x NEC Class 2 listed as ,,Limited Power Source", 100VA per channel

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