PULS PISA-M-408 Selective Protection Module, 4-Channel, 24VDC, 40A, DIN Rail

In industrial control panels, a short circuit on one sensor or actuator can shut down an entire 24VDC power supply. The PULS PISA-M-408 selective protection module prevents this by distributing the load across four individually protected output channels, each adjustable from 2A to 10A. If one channel fails, the others continue to operate, and a collective alarm output signals the fault. This module is used by panel builders and machine integrators to increase system availability and reduce downtime.

Key specifications

• Input voltage: 20 - 30 VDC (nominal 24 VDC)
• Number of output channels: 4
• Output current per channel: adjustable 2A, 4A, 6A, 8A, 10A
• Total output current: 40 A (4 x 10A)
• Tripping characteristic: electronic, fast for short-circuit, delayed for overload
• Mounting: DIN rail
• Connection: screw terminals
• Operating temperature: -25 to +70 °C
• Status indication: LED per channel, collective alarm output
• Efficiency: >99 %
• Remote control input: yes
• Alarm output: potential-free contact
• Approvals: UL 508, cULus, CB Scheme, CE, RoHS, REACH

Why choose it

The PISA-M-408 eliminates the need for individual fuses or circuit breakers on each branch. Its electronic protection reacts faster than conventional fuses, and the adjustable current settings allow precise matching to load requirements. The integrated alarm output enables remote monitoring of channel status.

Ideal use cases

• Protecting 24VDC loads in industrial control systems
• Distributing power to multiple sensors, actuators, or controllers
• Preventing total system shutdown due to a single branch fault
• Applications requiring selective protection and remote diagnostics

Good to know

The module is designed for DIN rail mounting and uses screw terminals for reliable connections. It operates within a wide temperature range and achieves over 99% efficiency, minimizing power loss. The short-circuit current rating is 10 kA for 24VDC systems.