Electronic circuit breakers
The all new PISA-B multi-channel electronic circuit breakers help you to optimize the availability of your DC 24 V systems right away and grow with your application.
Identify and isolate individual faulty branches
Fast trouble-shooting via real-time LED matrix and alarm signal
Easy system expansion - up to 64 output channels via bus bar connection
Integrated PIN protection and fail-safe feature
Push-in terminals for fast and toolless installation
8 channels, including + and - terminals, in a 52 mm wide unit
The next generation of electronic circuit breakers.
Selective tripping of overloaded channels
In the event of a fault, PISA-B disconnects the affected channels only and ensures constant power supply to the remaining loads. This means individual faulty connections can be rapidly identified, isolated and rectified.
Two different output types
PISA-B features two types of output channels. Channel 1 and 2 are ideal for high capacitive loads up to 100 mF and allow peak currents up to 12 A. Standard loads with up to 20 mF can be connected to channels 3 to 8 and are supplied with up to 10 A. You can choose between slow or fast tripping characteristics for all channels.
Instant current monitor
You can use the instant current monitor with LED technology at the front of the device to analyse and reset individual channels. The LED matrix helps to understand and evaluate your loads, detect peak currents and change your settings.
The electronic circuit breaker informs you about tripped channels via an alarm relay contact (PISA-B-812-B1, PISA-B-8CL2-B1). An optional “digital coded alarm signal” provides information about the tripping status of individual channels (PISA-B-812-B4, PISA-B-8CL2-B4)
The additional reset relay contact allows switching the device ON and OFF or resetting all tripped channels remotely.
The new design of the PISA-B helps to avoid accidential operating errors or manipulation via a PIN protection feature. The settings can be locked with a 4-digit PIN code via the user interface on the front of the device.
The fail-safe function is a back-up protection feature of the PISA-B. If one of the channel switches fails to open, the fail-safe function kicks in. Therefore an electronical switch is used instead of a traditional melting fuse. The electronic circuit breaker monitors the total current and can react much earlier, if the current becomes too high. This feature can save your lines from overheating.
The compact product design helps you to save space. The electronic circuit breaker includes plus and minus distribution terminals, with a total width of only 52mm - that means 6.5mm per channel.
PISA-B allows an easy and fast expansion of your system. Up to 8 devices can be connected in parallel via bus bars. This sums up to 64 channels in total.
PISA-B also assists you with a tool-less push-in technology. The terminals are optimized for automated wiring processes.
PISA-B gives you more of everything.
PISA-B is the most efficient electronic circuit breaker (ECB). It distributes the current, protects your loads from over-current or short-circuits and monitors the operating status in DC 24 V systems.
The 8-channel programmable capability can identify and isolate individual faulty branches. It shuts down the affected channels only and secures the constant power supply of the remaining loads.
An integrated data monitoring reports the operating status to a PLC or control center. The electronic circuit breaker also alarms in case of an error and allows a remote reset of the channels.
The new PISA-B is based on a modular product design. Up to 8 PISA-B electronic circuit breakers can be connected in parallel by using bus bars. This results in up to 64 channels.
Smart power distribution and load protection.
Improve and simplify your application.
Miniature circuit breakers
Solution with standard MCBs
This setup is quite risky for industrial applications. MCBs were originally designed to protect the cable runs in buildings on the AC side - not the system itself. Additionally this solution will not inform your condition monitoring system about the current system status or occuring errors.
Electronic circuit breakers
Solution with PISA-B
With a PISA-B solution you are on the safe side. The electronic circuit breaker will reliably secure your system components from overload and short-circuits. You will immediatley be informed via the alarm signal. All other loads stay unaffected and keep your system running.
PISA-B product overview.
Available from stock.
Electrical interconnection rail
PISA-B ♡ DIMENSION
A relationship that simply works.
The PISA-B electronic circuit breakers work with any sufficiently powerful AC/DC converter. But the most reliable connection will always be the one between a PISA-B and a DIMENSION DIN rail power supply from PULS. Both are a part of our fine-tuned ecosystem, which generates a couple of benefits.
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The right power supply choice mainly depends on the power consumption of your connected loads.If you need assistance in choosing the right power supply, please contact our PULS Application Center (PAC).
PISA-B complements perfectly with the following PULS power supplies.
To get the most out of the 8 channel PISA-B, we recommend power supplies with an output current of at least 20 A.
For further questions please .
Your industry in focus.
Contact a PULS specialist.
More technical information
High capacitive loads? No Problem.
PISA-B tripping characteristics.
PISA-B features a dual channel solution. Therefore the device includes two types of output channels. Channel 1 and 2 are ideal for high capacitive loads. Standard loads can be connected to channels 3 to 8. You can choose between slow or fast tripping characteristics for all channels.
Learn more about the dual channel solution and tripping characteristics:
Extendable system design.
Up to 64 channels in a row.
If more than 8 channels are required in an application, up to eight PISA-B modules can be connected via bus bars. In numerous applications, up to 64 outputs can be supplied with only one power supply.
Bus bars are thin copper bars, which are used for local power distribution. The grey bars are available in various lengths and are simply pushed in the slots on the front of the devices. Only the first PISA-B units needs to be wired to the power supply.
NEC Class 2 versions.
PISA-B is also available as NEC Class 2 version. With this device you are able to install up to 8 NEC Class 2 circuits. This is a very cost-effective solution based on one power supply unit and one electronic circuit breaker. You can even add more channels by simply connecting further PISA-B modules via the bus bars.
The NEC Class 2 version of the PISA-B provides a limited output power of 90 W. This means the current is fixed to max. 3.75 A per channel and cannot be set individually. The defined limits are also observed in the event of a fault. The user-interface on the front of the NEC Class 2 devices is therefore simplified and missing the current scale on the right side.
The following PISA-B units are perfect for applications where an NEC Class 2 certificate is mandatory.
Focus on decentralization?
FIEPOS eFused is the right choice.
The PISA-B units are IP20 electronic circuit breakers meant to distribute the current to several loads in one central protected spot - like a cabinet.
stands for IP54, IP65/IP67 field power supplies, designed to power and protect decentralized loads directly in the field - outside of a protected cabinet. It includes up to 4 current-limited outputs for selective current distribution, a variety of plug connectors and IO-Link as a communication interface.
So FIEPOS eFused and PISA-B share some essential features, but are designed for different applications. Ultimately, your individual application determines which solution is right for you.
If you need support in choosing the best solution, please contact our PULS Application Center (PAC):
Questions and answers.
Is PISA-B also compatible with power supplies from other brands?
Yes, PISA-B works with...