ABB PF900-NR 3BDH000357 Power Supply Feeding Module

ABB PF900-NR 3BDH000357 Power Supply Feeding Module
I. Basic Information
Brand: ABB (German manufacture)
Model: PF900-NR
Material code: 3BDH000357
Product name: Power Feed Module
Matching base: Special PR 900-N power rail backplate
Compatible system: ABB 800xA, PROFIBUS DP/PA link equipment LD800P, AC800M DCS system
Installation method: DIN rail + PR900-N system backplate plug-in installation

Core functions
Centralized 24V DC power supply for system backplane
Provides stable 24VDC power supply for the LD800P bus linkers and fieldbus interface cards on the PR900-N rail. Each module has a rated output of 4A, and dual modules in parallel redundancy can be expanded to a maximum output of 10A.
Dual redundant power supply input
Supports two independent 24VDC power supplies for connection, achieving power redundancy. When one power supply fails, it can seamlessly switch to ensure uninterrupted bus communication, suitable for high-reliability scenarios in power plants and chemical plants SIS/DCS.
Complete fault monitoring and alarm output
Built-in overcurrent, short circuit, overtemperature, and undervoltage hardware protection; real-time display of red and green status indicator lights on the panel; equipped with passive fault relay contacts, which can upload centralized fault alarm signals to the system.
Hardware mode configuration
Set the power supply mode and fault alarm trigger logic through onboard jumpers, suitable for single power supply / dual redundant power supply two cabinet power supply schemes.

Key electrical parameters Table
Parameter item Technical specification
Input voltage DC 24V (two redundant inputs, 19.2~30VDC)
Rated output DC 24V, single module 4A; dual modules in parallel maximum 10A
Protection type Short circuit, overcurrent, overtemperature, reverse connection protection, fault automatic locking
Alarm output Passive relay contacts (contacts close when fault occurs)
Operating temperature -20℃ ~ +60℃
Protection grade IP20 (installed in the control cabinet)
Dimensions 45mm×125mm×110mm
Net weight Approximately 0.42kg

Panel indicator light explanation
Green RUN light constantly on: normal power input, module power supply working normally
Red FAULT light constantly on: output short circuit, overcurrent, insufficient power supply voltage, module overheating fault
When a fault is triggered, relays at terminals 7 and 10 are attracted, sending a total fault signal to the upper system

Typical application scenarios
Power supply for 800xA system of thermal power and gas-fired power plants via PROFIBUS PA fieldbus cabinet, coupled with LD800P bus coupler for power supply;
Redundant power supply for SIS safety instrument system and DCS control system bus equipment in petroleum, chemical industries;
Power supply for ABB AC800M distributed control system card in water treatment, metallurgy, papermaking industries;
Replacement of old ABB fieldbus control cabinets and upgrading of redundant power supply circuits.