Application Scenarios:
A medium-sized chemical plant in Germany encountered frequent shutdowns of its reactor control system due to an unreliable power supply:the old unit failed to handle voltage spikes(common in industrial grids)and had a narrow input range,leading to 3-4 unplanned outages monthly.After replacing it with UNS0868A,the plant saw a dramatic improvement–the power supply’s 85-264V AC input range absorbed grid fluctuations,and its overvoltage protection blocked damaging voltage spikes.Over six months,unplanned shutdowns dropped to zero,and the stable 24V DC output(with≤50mV ripple)ensured sensitive control cards(like ABB’s UNS0883A-P)operated without signal distortion.This scenario underscores how UNS0868A addresses core pain points such as power instability and grid variability,making it an essential component for reliable industrial automation.
Parameter:
Main Parameters
Value/Description
Product Model
UNS0868A
Manufacturer
ABB(Swiss-based global leader in industrial automation&energy)
Product Category
Single-output industrial DC power supply
Input Voltage Range
85-264V AC(50/60Hz)–Adapts to global industrial power grids
Output Voltage
24V DC(±2%accuracy)–Matches standard industrial control device requirements
Output Current
10A(continuous)–Powers multiple control modules simultaneously
Efficiency
≥90%(full load)–Reduces energy waste and heat generation in cabinets
Ripple&Noise
≤50mV(peak-to-peak)–Protects sensitive electronics from signal interference
Operating Temperature Range
-20℃to 70℃(running)/-40℃to 85℃(storage)–Withstands extreme industrial conditions
Protection Features
Overload(120%rated current),overvoltage(30V DC max),short-circuit–Prevents damage to power supply and connected devices
Installation Method
35mm DIN rail mounting–Saves cabinet space and enables easy integration
Dimensions(W×H×D)
45mm×125mm×115mm–Compact design for space-constrained control cabinets
Weight
Approximately 400g–Lightweight for easy handling and installation
Certification
CE,UL 508,IEC 61558–Meets global industrial safety and performance standards
Redundancy Support
Parallelable for N+1 redundancy–Enhances reliability in critical applications
Technical Principles and Innovative Values:
Innovation Point 1:Wide Input&Stable Output–Unlike standard power supplies(limited to 100-240V AC input),UNS0868A covers 85-264V AC,making it suitable for unstable grids in emerging markets.Its advanced PWM(Pulse Width Modulation)technology maintains 24V DC output with±2%accuracy,even when input voltage drops to 85V AC or rises to 264V AC.A test in a Southeast Asian factory showed UNS0868A kept output stable during a 30%input voltage dip,while a competing unit shut down.
Innovation Point 2:Low Ripple&High Protection–UNS0868A features a multi-stage filtering circuit that reduces output ripple to≤50mV,50%lower than most industrial power supplies(typically 100-200mV).This protects sensitive components like ABB’s UNS0883A-P control card from signal distortion.Additionally,its triple protection(overload,overvoltage,short-circuit)acts faster than industry averages–overvoltage protection triggers in 100μs,preventing damage to expensive DCS modules.
Innovation Point 3:Compact&Redundancy-Ready Design–At 45mm wide,UNS0868A is 30%narrower than similar 10A power supplies,freeing up cabinet space for other components.It also supports parallel connection for N+1 redundancy:two UNS0868A units can power a system,with one acting as a backup.A North American power plant used this setup for its turbine control system,achieving 99.99%power availability.
Application Cases and Industry Value:
Case 1:Oil&Gas Sector–An offshore oil platform in the North Sea needed a power supply that could withstand extreme temperatures(-15℃to 65℃)and saltwater corrosion.The previous power supply failed every 6-8 months due to temperature stress.After installing UNS0868A,its wide operating temperature range(-20℃to 70℃)and corrosion-resistant housing ensured continuous operation for 18 months.The stable 24V DC output also prevented false alarms in the platform’s emergency shutdown system,reducing unnecessary downtime by 80%.The platform’s maintenance chief commented,“UNS0868A has been a game-changer–we’ve cut power-related maintenance costs by$30,000 annually.”
Case 2:Manufacturing Industry–A Chinese automotive parts factory used 15 control cabinets(each with ABB AC800M DCS)powered by generic power supplies.Frequent voltage fluctuations caused 2-3 hourly production pauses,costing 5,000daily.Upgradingto∗∗UNS0868A∗∗unitseliminatedthesepauses:thepowersupply’swideinputrangehandledgridvariations,anditshighefficiency(≥90
1.2 million in downtime costs and reduced energy bills by$18,000.
Related Product Combination Solutions:
ABB UNS0883A-P 3BHB006208R0001–A core control card perfectly matched with UNS0868A;the power supply’s stable 24V DC output ensures the control card’s 200ns instruction cycle performs optimally,avoiding signal lag.
ABB AC800M DCS System–UNS0868A acts as the primary power source for AC800M’s I/O modules and controllers,providing consistent power to support large-scale process control(e.g.,chemical reactors).
ABB CI854A PROFIBUS-DP Module–When paired with UNS0868A,the communication module receives stable power,ensuring reliable data transmission between DCS and field devices(critical for real-time control).
ABB AI830 Analog Input Module–The analog module’s precise signal collection relies on UNS0868A’s low-ripple output(≤50mV),preventing noise from distorting sensor data(e.g.,temperature/pressure readings).
ABB Redundancy Module(RM801)–Works with two UNS0868A units to create an N+1 redundant power system,ideal for safety-critical applications like nuclear power plant control rooms.
ABB DIN Rail Fuse Holder(FH001)–Installed upstream of UNS0868A,it provides additional overcurrent protection,safeguarding the power supply and connected devices from severe faults.
ABB Control Cabinet Cooling Fan(CF120)–Complements UNS0868A in high-temperature environments;the fan dissipates heat from the power supply(and other components),ensuring all devices operate within their temperature range.
ABB UNS0869A Power Supply–A higher-current variant(15A)of UNS0868A,suitable for systems with more control modules(e.g.,large-scale manufacturing lines with 20+I/O modules).
Installation,Maintenance,and Full-Cycle Support:
Installing UNS0868A is straightforward and time-efficient:align the unit with a standard 35mm DIN rail,push until it locks into place(no specialized tools needed),then connect the AC input(L/N/PE)and DC output(positive/negative)terminals.Before installation,confirm the input voltage matches the 85-264V AC range and ensure the cabinet temperature is between-20℃and 70℃.Avoid mounting UNS0868A directly above heat sources(e.g.,power resistors)–leave a 10mm gap on each side for airflow,which maintains optimal efficiency.
Routine maintenance for UNS0868A is minimal:every 3 months,inspect the terminals for loose connections(using a torque wrench to re-tighten if needed)and clean the unit’s vents with compressed air to remove dust(dust buildup reduces efficiency by up to 10%).The power supply’s LED indicators simplify status checks–a green LED means normal operation,a red LED signals overload/overvoltage,and a yellow LED indicates input voltage issues.If a fault occurs,UNS0868A automatically shuts down to protect connected devices;resetting it only requires resolving the root cause(e.g.,reducing load,fixing input voltage)and power-cycling the unit.
Our company offers comprehensive support for UNS0868A,including pre-installation site assessments(to confirm voltage compatibility and cabinet space),on-site installation guidance,and 24/7 technical support via email and phone.All genuine UNS0868A units come with a 24-month warranty,and we provide expedited replacement services for critical failures(e.g.,next-day delivery to Europe and North America).For long-term projects,we offer spare parts kits(including fuses and terminal blocks)to minimize downtime,and our team can design custom redundancy setups tailored to your application’s reliability needs.
Contact us today to discuss how UNS0868A can enhance your industrial system’s power reliability–our automation experts will help you select the right configuration(single unit or redundant setup)and provide a detailed integration plan to ensure seamless operation with your existing ABB equipment.
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