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ABB DSSB145 DC/DC Converter 

1. Key Parameters

• Product Model: DSSB145
• Product Series: ABB AC500 Series Industrial Isolated DC/DC Converters (Voltage Conversion & Isolation)
• Core Function: Converts input DC voltage (24V/48V) to regulated output DC voltage (12V/24V); provides galvanic isolation between input and output to prevent ground loops; suppresses EMI/EMC interference; offers overvoltage/overcurrent/short-circuit/overtemperature protection; delivers stable output for AC500 modules, sensors, and actuators; supports DIN rail mounting for industrial cabinet integration
• Electrical Conversion Specifications:

  Parameter	Details	Performance Metrics
  Input Characteristics	- Input Voltage Range: Dual-range (24V DC ±20%: 19.2V~28.8V; 48V DC ±20%: 38.4V~57.6V) - Input Current: Max 5A (24V input); Max 2.5A (48V input) - Input Protection: Reverse polarity (diode-protected); surge protection (IEC 61000-4-5, 1kV)	Dual input range adapts to global industrial DC power systems (24V/48V); 1kV surge protection withstands voltage spikes from mains or load switching; reverse polarity protection avoids damage from incorrect wiring
  Output Characteristics	- Output Voltage Options: Configurable (12V DC ±2% or 24V DC ±2%, via DIP switch) - Output Power: 60W (max continuous) - Output Current: 5A (12V output); 2.5A (24V output) - Voltage Regulation: ±0.5% (line regulation); ±1% (load regulation) - Ripple & Noise: ≤30mVpp (20MHz bandwidth)	Configurable output suits diverse loads (12V for legacy sensors, 24V for AC500 I/O modules); ≤30mVpp ripple ensures stable operation of sensitive components (e.g., analog sensors, signal processing boards); 60W power covers mid-scale load clusters
  Isolation & EMI Performance	- Galvanic Isolation: 2kV AC (input to output, 1 minute) - Insulation Resistance: ≥100MΩ (500V DC, input-output) - EMC Compliance: EN 61000-6-2 (immunity: Level 3); EN 61000-6-3 (emission: Class B) - Noise Suppression: Built-in LC filter (for conducted noise) + shielded transformer (for radiated noise)	2kV AC isolation prevents ground loops between different power domains (e.g., 48V mains and 24V PLC circuits); EMI compliance avoids interference with AC500 communication (e.g., PROFINET, Modbus); LC filter eliminates conducted noise from variable-frequency drives (VFDs)

• Mechanical & Environmental Specifications:

  Parameter	Details	Performance Metrics
  Mechanical Design	- Dimensions: 90mm (W) × 50mm (H) × 120mm (D) - Mounting Type: DIN rail mount (EN 50022, 35mm) - Housing Material: Flame-retardant thermoplastic (UL 94 V0) with impact-resistant design - Weight: Approximately 280g - Indicators: 2× LED status lights (green = output normal; red = fault/overload)	Compact DIN rail design fits in space-constrained AC500 control cabinets; UL 94 V0 housing reduces fire risk in dense rack configurations; LEDs enable quick on-site troubleshooting (no tools needed)
  Environmental Ratings	- Operating Temperature Range: -25℃~+70℃ (-13℉~158℉) - Storage Temperature Range: -40℃~+85℃ (-40℉~185℉) - Humidity Tolerance: 5%~95% RH (non-condensing, 40℃) - Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6) - Shock Resistance: 30g (11ms half-sine, IEC 60068-2-27)	-25℃~+70℃ range suits unconditioned industrial spaces (e.g., factory floors, outdoor substations); vibration resistance prevents loose connections in high-motion environments (e.g., near conveyors, pumps); humidity tolerance avoids performance issues in damp utility cabinets

• Protection & Compliance Specifications:

  Parameter	Details	Performance Metrics
  Protection Features	- Overvoltage Protection: 14.4V DC (12V output); 28.8V DC (24V output) (latching reset) - Overcurrent Protection: 6A (12V output); 3A (24V output) (hiccup mode, auto-recovery) - Short-Circuit Protection: Current limiting (≤7A for 12V; ≤3.5A for 24V) (hiccup mode) - Over-Temperature Protection: 85℃ ±5℃ (thermal shutdown, auto-recovery when cooled)	Latching overvoltage protection prevents irreversible damage to sensitive loads (e.g., 12V legacy sensors); hiccup-mode overcurrent/short-circuit protection avoids converter damage while allowing temporary load faults to clear; thermal shutdown protects against overheating in hot cabinets
  Compliance Standards: CE, UL 508, CSA C22.2 No.14, IEC 61558-2-1 (power converters), IEC 60950-1 (safety), RoHS 2.0, ISO 9001

2. Core Features

• Dual Input/Dual Output Flexibility: 24V/48V dual input + 12V/24V configurable output (via DIP switch)—adapts to diverse industrial power systems (e.g., 48V DC mains in data centers, 24V DC in manufacturing) and load requirements (12V for legacy sensors, 24V for AC500 I/O modules); eliminates the need for multiple converters, reducing inventory costs and cabinet space.
• 2kV AC Galvanic Isolation: Input-output isolation prevents ground loops between different power domains—critical for large automation networks (e.g., 48V DC factory mains and 24V DC PLC circuits) where ground potential differences cause analog signal distortion or digital communication errors; 100MΩ insulation resistance ensures long-term isolation reliability.
• High Efficiency & Low Ripple: 92% peak conversion efficiency (at 50%~75% load) + ≤30mVpp output ripple—reduces energy waste (low heat generation) for 24/7 operation (e.g., $30~$60/year in energy savings per unit); low ripple ensures stable performance of sensitive components (e.g., AC500 DSPB112 signal processing modules, 12V pressure transmitters).
• Robust EMI Suppression: Built-in LC filter + shielded transformer—complies with EN 61000-6-3 Class B emission standards, avoiding interference with AC500 communication protocols (PROFINET, Modbus TCP); withstands Level 3 EMC immunity (EN 61000-6-2), ensuring stable operation near noise sources (VFDs, welding machines).
• Comprehensive Fault Protection: Overvoltage/overcurrent/short-circuit/overtemperature protection—covers all common industrial faults (e.g., shorted sensor wiring, input voltage spikes); hiccup-mode protection auto-recovers from temporary faults (e.g., momentary overloads), while latching overvoltage protection requires manual reset to prevent repeated damage to loads.
• Industrial-Grade Durability: UL 94 V0 flame-retardant housing + -25℃~+70℃ operating range—withstands harsh industrial conditions (dust, moisture, temperature fluctuations) that damage consumer-grade converters; 30g shock resistance survives accidental impacts during cabinet maintenance, extending service life to 7+ years.
• Plug-and-Play Integration: DIN rail mounting + standard terminal blocks—installs in <5 minutes (no custom brackets needed); compatible with all AC500 series PLCs and industrial automation components (sensors, actuators, HMIs); no programming or calibration required, reducing setup time for system integrators.

3. Application Fields

• Manufacturing Automation: Voltage Adaptation:
  • Automotive Assembly Plants: Converts 48V DC factory mains to 24V DC for AC500 I/O modules (e.g., DSMB178 digital I/O)—2kV isolation prevents ground loops between welding zones and PLC circuits; ≤30mVpp ripple ensures accurate sensor readings (e.g., robotic position encoders); 60W output powers 2× DSMB modules + 4× 24V actuators.
  • Electronics SMT Factories: Adapts 24V DC PLC power to 12V DC for legacy surface mount sensors—configurable output (via DIP switch) avoids replacing costly 12V sensors; EMI suppression prevents interference from reflow ovens, ensuring stable SMT line operation; DIN rail mounting fits in compact cleanroom cabinets.
• Process Control: Isolated Power Distribution:
  • Chemical Plants: Provides isolated 24V DC for AC500 analog I/O modules (e.g., DSMB340)—2kV isolation prevents ground loops between process sensors (e.g., pH transmitters) and PLC circuits, eliminating analog signal drift; over-temperature protection withstands heat from nearby reactors; surge protection resists voltage spikes from chemical pumps.
  • Oil Refineries: Converts 48V DC substation power to 24V DC for pipeline monitoring PLCs—-25℃~+70℃ range suits outdoor substation cabinets; flame-retardant housing reduces fire risk in hazardous areas; isolation protects PLCs from ground faults in remote pipeline sensor networks.
• Energy & Utilities: Voltage Matching:
  • Power Substations: Converts 48V DC battery power to 24V DC for AC500 auxiliary control modules (e.g., DSPC155)—2kV isolation prevents ground loops between substation battery systems and PLCs; low ripple ensures stable operation of voltage-sensitive components (e.g., current transformers); EMI immunity resists interference from high-voltage switchgear.
  • Solar PV Plants (100MW+): Adapts 48V DC inverter power to 24V DC for AC500 PLCs—high efficiency (92%) reduces energy loss in solar-powered systems; wide input range (38.4V~57.6V) handles variable inverter output during cloudy conditions; DIN rail mounting fits in inverter control cabinets.
• Infrastructure & Transportation: Isolated Power:
  • Metro Station Control Rooms: Converts 24V DC rail power to 12V DC for legacy HVAC sensors—configurable output avoids sensor replacement; 2kV isolation prevents ground loops between metro traction systems and building automation; shock resistance withstands train-induced vibrations, ensuring reliable HVAC control.
  • Water Treatment Facilities: Provides isolated 24V DC for AC500 pump control modules—humidity tolerance (5%~95% RH) suits damp pump station cabinets; short-circuit protection avoids damage from flooded sensor wiring; 60W output powers 2× pump controllers + 2× level sensors, ensuring uninterrupted water filtration.

The structure and details of the product：

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