Technical Specifications Built‑in high‑capacity energy storage unit and lithium‑ion backup battery. Supports real‑time data mirroring from CPU working memory. Nominal power supply 24 V DC, allowable input voltage range 19.2‑30 V DC. Typical power consumption is 3.2 W. Operating temperature range ‑25 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Protection class IP20 for cabinet‑mount installation. Certifications include CE, UL and RoHS compliance. Optional G3 anti‑corrosion conformal coating for harsh corrosive‑gas environment.
Functional Features Realizes automatic backup of CPU runtime process variable data upon main power loss. Supports configuration parameter and event log temporary preservation. LED indicators display power status, battery health and running state. Communicates with CPU module through system back‑plane bus. Supports battery health self‑diagnosis and battery failure alarm output. Battery replacement can be completed without system shutdown under redundant configuration.
Application Scenarios Deployed in DCS control cabinet of power plant, chemical industry, oil‑gas and other continuous‑process industries. Matches Freelance series CPU modules to protect important runtime data. Prevents loss of critical process data caused by sudden power failure. Applies to medium‑large‑scale industrial automation projects with high requirements for data continuity.
Installation Requirements Slide PMKHRMBRC3000B module onto standard DIN‑rail inside control cabinet until locking mechanism clicks fully. Wire 24 V DC power supply strictly following polarity marking. Complete back‑plane bus connection with Freelance CPU module. Reserve proper ventilation clearance around module surface for heat dissipation. Download related hardware configuration parameter from Freelance Engineering Tool software. Ensure cabinet protective grounding complies with ABB Freelance DCS grounding specification.
Usage Notes Apply anti‑static wrist strap before touching exposed circuit‑board components. Observe front‑panel LED indicator status after power‑on. Replace internal lithium‑ion battery pack when battery LED alarms, strictly follow battery polarity mark during replacement.
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