APCBB3/3 B & R Automation
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The APCBB3/3 is an automation PC unit produced by B & R Automation as part of the APC Industrial Automation PC Units series. It operates at a nominal voltage of 24 VDC with a nominal current of 6 Amps and provides buffer time of 10 milliseconds. The unit features 512 kilobytes of onboard SRAM, 192 kilobytes of remanent variable storage, and has galvanic isolation.
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Product Description:
The APCBB3/3 is a modular component produced by B & R Automation for the APC Industrial Automation PC Units series. Installed in a control cabinet, the board supports power buffering and nonvolatile data handling functions required by programmable logic controllers and industrial PCs. By sliding into a dedicated compact slot, it works alongside bus-oriented expansion modules to maintain system operation during brief power dips and to preserve key variables between machine cycles. Its electrical and memory features are integrated to keep the automated cell synchronized during unexpected supply events.
Electrical requirements are centered on a supply of 24 VDC ±25%, and this tolerance lets the board continue operating under typical cabinet voltage fluctuations. Under nominal conditions, it draws 6 A, a figure that affects fuse sizing and power supply selection. The onboard energy storage sustains outputs for 10 ms, which is long enough for the upstream CPU to execute a controlled shutdown or refresh its capacitors. Protection measures include galvanic isolation, which separates external supply lines from internal logic, and compliance with Overvoltage Category II, indicating that it is intended for fixed-installation circuits downstream of primary distribution. No user adjustments are required because parameters are factory calibrated for the installed platform.
System integration uses 1 bus unit slot that links the board to the APC backplane, while a separate 1 slide-in compact slot accommodates its mechanical enclosure. For program execution, the module offers 512 kB of SRAM, giving the controller fast, volatile workspace for real-time variables. Persistent process data are stored in 192 kB for remanent variables, allowing machine parameters and counters to survive a power cycle without external memory cards. These resources minimize write cycles on flash media inside the PC and speed program restarts.
Frequently Asked Questions about APCBB3/3:
Q: What is the nominal operating voltage for the APCBB3/3 unit?
A: The APCBB3/3 from B & R Automation operates at a nominal voltage of 24 VDC ±25%.
Q: Does the APCBB3/3 provide galvanic isolation?
A: This model features galvanic isolation, enhancing electrical separation and reliability.
Q: What is the buffer time specification for the APCBB3/3?
A: The APCBB3/3 has a buffer time of 10 ms for consistent operation during brief power interruptions.
Q: How much onboard SRAM does the APCBB3/3 provide?
A: The unit is equipped with 512 kB of onboard SRAM for temporary data storage.
Q: How many bus unit slots are available on the APCBB3/3 device?
A: The APCBB3/3 supports one bus unit slot, allowing connection of compatible modules.
