Application Scenarios

In a thermal power plant’s DCS cabinet, the main 24V DC system power is fed into the SPS03-15V. The module then generates a clean 15V supply for a bank of older-generation analog output cards that drive control valves. Its high isolation and low ripple ensure that the 4-20mA control signals are not corrupted by electrical noise from motors and drives in the switchyard.

 

Parameter

Main Parameters	Value/Description
Product Model​	SPS03-15V​
ABB Order Code​	2VAA008281R001​
Input Voltage​	24 V DC​ (Range: 20.4 – 28.8 V DC)
Output Voltage​	15 V DC​ (Adjustable: 14.4 – 15.6 V)
Output Current​	3 A​ (Continuous)
Rated Power​	45 W​
Efficiency​	≥ 85%
Isolation​	1500 V AC (Input-Output)
Protections​	OVP, OCP, Short Circuit, Overtemperature
Cooling​	Natural Convection (Fanless)
Operating Temp.​	-25°C to +70°C​
Mounting​	DIN Rail (35mm)

 

 

Technical Principles and Innovative Values

• Innovation Point 1: Precision Voltage Regulation for Sensitive Analog Loads:​ Unlike generic DC converters, the SPS03-15V​ is engineered with tight voltage regulation (±1% load regulation) and extremely low output ripple (≤150 mVpp). This is critical when powering operational amplifiers in analog I/O modules, where voltage drift directly translates to measurement or control signal error. It ensures that sensitive instrumentation receives “clean” power, immune to fluctuations in the main 24V bus.
• Innovation Point 2: Ruggedized Design for Wide-Temperature Operation:​ The module is built to survive in non-climatized industrial cabinets. With an operating temperature range of -25°C to +70°C​ and a fanless metal housing, it relies on passive heat sinking. This eliminates the common point of failure (fan bearings) found in larger power supplies, making it ideal for extreme environments like steel mills or outdoor substations where cooling is not available.
• Innovation Point 3: High Isolation as a Noise Barrier:​ Featuring 1500V AC​ input-output isolation, the module acts as an effective barrier against ground loops and common-mode noise. In control systems where the 24V DC ground might be noisy due to变频器 (VFDs) or large contactors, this isolation prevents high-frequency noise from coupling into the sensitive 15V analog circuits, thereby protecting signal integrity.

 

Application Cases and Industry Value

Case 1: Petrochemical Plant DCS Retrofit, China.​ A refinery upgrading its ABB MOD 300 system retained its existing analog output racks, which required 15V power. The SPS03-15V​ modules were deployed to replace aging linear power supplies. The switch-mode efficiency reduced cabinet heat load by 30%, and the built-in overload protection prevented damage to expensive AO cards during field wiring faults, extending the life of the legacy system without a full hardware replacement.Case 2: Hydroelectric Governor System, Europe.​ In a remote hydro plant, governors used ±15V for servo amplifier cards. The SPS03-15V​ (providing +15V) was paired with a complementary -15V module. Its wide input voltage range (20.4-28.8V) tolerated voltage sags from the long cable runs from the plant’s battery bank. The module’s reliability in a high-humidity environment ensured continuous turbine control without unplanned outages.