PULS PISA‑B‑812‑B1 24 V 40 A 8‑Channel Electronic Circuit Breaker, DIN Rail

PULS PISA‑B‑812‑B1 is an 8‑channel 24 V electronic circuit breaker that safely distributes up to 40 A from a single 24 Vdc supply, providing adjustable protection per channel and selective shutdown of faulty loads to keep the rest of the system running. Ideal for modern control panels, it combines compact DIN rail design, push‑in wiring, and a common alarm signal for fast diagnostics and higher machine uptime.

Key features

• 8 output channels: 2 channels adjustable from 1–12 A for high‑current or high‑capacitance loads, and 6 channels adjustable from 1–10 A for standard loads.​

• Total output current up to 40 A across all channels, suitable for distributing a single 24 Vdc supply to multiple branch circuits.​

• Selectable fast or slow tripping characteristics (device family feature) to match different load types and coordination requirements.​

Performance and protection

• Input voltage range of DC 19.2–30 V for use on 24 Vdc control systems with typical tolerances.​

• Electronic overcurrent protection selectively disconnects only the overloaded or shorted channel, keeping all other loads in operation and improving machine uptime.​

• Common alarm relay contact signals tripped channels to a PLC or monitoring system for centralized diagnostics and maintenance.​

Mechanical and installation details

• Compact 52 x 124 x 130 mm metal housing optimized for DIN rail mounting in industrial control panels.​

• Push‑in clamp connections for quick, tool‑less wiring and vibration‑resistant terminations.​

• Typical internal consumption of 40 mA at no load and power losses around 10.8 W, supporting efficient panel design and thermal planning.​

Reliability and environmental

• Operating temperature range from -25 °C to +70 °C, allowing use in a wide variety of cabinet and ambient conditions.​

• Typical MTBF of 512,000 h at 40 °C (SN 29500), supporting long service life in continuous operation applications.​

• No‑load losses of about 1 W help minimize standby consumption when outputs are not loaded.​

Typical applications

• 24 Vdc power distribution in machine control panels, splitting a single power supply into multiple protected branches.​

• Protection of PLC I/O, sensors, actuators, and field devices where selective channel shutdown and remote alarm signaling are important.​

• Systems requiring scalable multi‑channel protection, as PISA‑B modules can be paralleled via bus bars to increase the number of protected channels.