Technical Specifications Model: NPBU‑42C Backup Power Output: 24 VDC short‑time backup power Backup Duration: Guaranteed several‑seconds power‑hold time for control‑circuit load Charging Input: 24 VDC main auxiliary power‑supply input Mounting Method: 35 mm DIN‑rail mounting Operating Temperature: 0 ℃ to +55 ℃ Storage Temperature: ‑20 ℃ to +70 ℃ Relative Humidity: 5‑95 %, non‑condensing Protection Class: IP20 Certifications: CE
Functional Features Internal energy‑storage components realize short‑time power backup for drive control circuit during main power‑supply drop‑out. Supports fault‑event data storage and orderly shutdown logic execution after main power loss. Automatic charging function when normal 24 VDC main power‑supply recovers. Front‑panel LED indicator shows charging status and backup‑unit health status. Hardware over‑charge and over‑discharge protection for internal energy‑storage components. DIN‑rail modular installation for convenient cabinet layout and replacement.
Application Scenarios Spare‑part replacement for NPBU‑42C backup unit inside ABB ACS600 multidrive cabinet. Power‑failure data‑protection for key production equipment variable‑speed drive system. Hardware maintenance and renewal of legacy ABB drive control cabinet.
Installation Requirements Clip NPBU‑42C onto 35 mm standard DIN‑rail inside drive cabinet, keep horizontal installation orientation. Connect main 24 VDC auxiliary power‑supply to input terminal block. Connect backup‑power output terminal block to drive control‑circuit power‑load loop. Implement protective earthing complying with cabinet grounding specification. Ambient operating temperature shall keep within 0 ℃ ~ +55 ℃ without condensation. Verify charging function and power‑failure backup performance after installation.
Usage Notes Do not short‑circuit output terminals of NPBU‑42C. Wear anti‑static wrist strap during module replacement operation. Check LED status regularly during equipment daily maintenance. Execute lock‑out‑tag‑out safety procedure before cabinet internal wiring modification work.
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