3BP155.4 B & R Automation
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The B & R Automation 3BP155.4 is a controller in the System 2005 Controllers series. It features six slots and supports expansion with up to four I/O modules. The controller has a width of 240 mm, a height of 165 mm, and an IP20 protection rating, with an operating temperature range of 0 to 60 degrees Celsius.
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Product Description:
The 3BP155.4 controller is produced by B & R Automation as part of the System 2005 Controllers series. It serves as the central processing and backplane unit for compact PLC installations, allowing field I/O and system modules to be combined in one DIN-rail assembly. Within an automation cell, the device coordinates connected sensors, actuators, and interface cards, enabling deterministic cycle execution and communication with higher-level networks. The backplane section also distributes power and internal bus communication across attached modules, reducing the need for separate interconnect hardware within the rack. That arrangement supports compact machine sections where the control platform must sit close to local I/O.
Physically, the housing is only 240 mm wide, 23 mm deep, and 165 mm high, so it occupies a narrow footprint inside crowded control cabinets. Six card guides provide 6 slots for a compact arrangement of CPU, power, and interface cards. The enclosure carries an IP20 rating, meaning solid objects larger than 12.5 mm are blocked, but the unit must still be mounted inside a closed panel. Its slim depth also leaves room for adjacent wiring ducts and terminal blocks, which helps keep cable routing orderly in dense cabinet layouts. The narrow profile can also preserve door clearance in shallow enclosures and leave more space for wire bends near the terminal area.
Continuous operation is allowed between 0 °C and 60 °C, so the controller can share enclosures with power supplies that generate moderate heat without forced cooling. Storage is permitted down to −25 °C, while long-term storage should not exceed 70 °C. The design tolerates relative humidity from 5% to 95 % non-condensing, making it suitable for humid production areas when cabinet conditions prevent moisture buildup. During installation, a minimum side clearance of 20 mm promotes natural convection along the fins, and the expansion connector supports up to 4 I/O modules, allowing additional digital or analog points in the same assembly. Adequate side spacing and dry cabinet conditions help the controller maintain stable operation during long production runs.
Frequently Asked Questions about 3BP155.4:
Q: How many I/O modules can be expanded on the 3BP155.4 controller?
A: The 3BP155.4 supports the addition of up to 4 I/O modules for system expansion.
Q: What is the permissible operating temperature range for the 3BP155.4 controller?
A: This unit operates efficiently in ambient temperatures from 0 °C to 60 °C.
Q: What protection rating does the 3BP155.4 controller provide?
A: The 3BP155.4 meets the IP20 protection rating standard.
Q: What is the minimum side clearance required for installing the 3BP155.4?
A: The installed controller must maintain a minimum side clearance of 20 mm.
Q: How many slots are provided on the 3BP155.4 controller?
A: A maximum of 6 slots are available for module installation in the 3BP155.4.
