ABB DSPP4LT Regulated Power Supply Module | 24VDC Industrial Control | 1KHL01223R0002

ABB DSPP4LT Regulated Power Supply Module – Industrial-Grade 24VDC Control Solution

The ABB DSPP4LT (1KHL01223R0002) is a high-performance regulated power supply module engineered for demanding industrial control and protection applications. Utilizing advanced switching technology with galvanic isolation, it delivers stable 24VDC output to power ABB Relion protection relays, control circuits, and auxiliary devices. Designed for DIN-rail mounting, this module integrates seamlessly into substation automation, power distribution, and process control systems.

Ideal for electrical utilities, power generation facilities, industrial plants, and OEM panel builders, the DSPP4LT addresses critical challenges including voltage fluctuations, electrical noise interference, space constraints in control cabinets, and the need for continuous uptime in mission-critical environments. Its compact footprint, wide input voltage tolerance, and robust protection features make it the preferred choice for engineers seeking reliable, maintenance-free power solutions.

Featuring universal AC/DC input compatibility, short-circuit protection, thermal shutdown, and LED status indication, this module ensures operational safety and diagnostic convenience. Whether you're upgrading legacy protection systems, designing new substation control panels, or integrating distributed control architectures, the DSPP4LT provides the performance and reliability demanded by modern industrial infrastructure. Contact our application engineers for technical specifications, compatibility verification, and volume pricing.

Core Features & Technical Advantages

Regulated 24VDC Output with High Stability
Precision voltage regulation maintains ±2% output tolerance across full load range, ensuring consistent operation of sensitive protection relays and control logic circuits even under varying input conditions.

Wide Input Voltage Range
Accepts 88-264VAC or 110-300VDC input, providing flexibility for global deployment and compatibility with diverse power infrastructure without requiring voltage-specific models or external transformers.

Galvanic Isolation & Noise Immunity
3kVAC input-to-output isolation protects downstream equipment from ground loops, transient surges, and electromagnetic interference common in high-voltage substation environments.

Compact DIN-Rail Design
Space-efficient 45mm width housing mounts directly on standard 35mm DIN rail, maximizing cabinet density while simplifying installation and hot-swap maintenance procedures.

Comprehensive Protection Mechanisms
Integrated overcurrent, overvoltage, short-circuit, and thermal protection with automatic recovery ensures system resilience and prevents cascading failures during fault conditions.

Visual Diagnostics & Status Monitoring
Front-panel LED indicators provide instant confirmation of power status and fault conditions, reducing troubleshooting time and enabling rapid field diagnostics without test equipment.

Industrial Temperature & Environmental Rating
Operates reliably across -25°C to +70°C ambient range with conformal coating options for harsh environments including high humidity, dust, and corrosive atmospheres.

Typical Application Scenarios

The DSPP4LT power supply module is engineered for applications demanding uncompromising reliability and precise voltage regulation, particularly in:

Electrical Substations & Switchgear Control
Powers ABB Relion 670, 650, and 615 series protection relays in transmission and distribution substations, providing stable auxiliary power for differential, distance, and overcurrent protection functions while maintaining compliance with IEC 61850 communication requirements.

Power Generation & Renewable Energy Systems
Supplies control power for generator protection, synchronization panels, and SCADA interfaces in thermal plants, hydroelectric facilities, wind farms, and solar inverter stations where voltage stability directly impacts grid synchronization accuracy.

Industrial Process Control & Automation
Supports PLC I/O modules, HMI panels, field transmitters, and motor control circuits in chemical processing, oil & gas, water treatment, and manufacturing environments requiring 24VDC control voltage with minimal ripple and noise.

Building Management & Critical Infrastructure
Energizes fire alarm panels, access control systems, emergency lighting controllers, and HVAC automation in hospitals, data centers, airports, and commercial facilities where power supply failure could compromise safety or operations.

Marine & Offshore Platforms
Provides reliable DC power for navigation systems, engine monitoring, and safety instrumentation on vessels and offshore installations subject to wide voltage swings, vibration, and corrosive salt-air environments.

Technical Specifications & Selection Guide

To facilitate accurate specification and procurement, key electrical and mechanical parameters are summarized below:

Electrical Characteristics:

• Output Voltage: 24VDC nominal (adjustable 22-28VDC)
• Output Current: 4A continuous, 5A peak (30 seconds)
• Output Power: 96W maximum
• Input Voltage: 88-264VAC (47-63Hz) or 110-300VDC
• Efficiency: >88% at nominal load
• Isolation: 3kVAC input-to-output, 1.5kVAC output-to-ground
• Ripple & Noise: <50mVpp (20MHz bandwidth)

Mechanical & Environmental:

• Mounting: 35mm DIN rail (EN 60715)
• Dimensions: 45mm (W) × 124mm (H) × 117mm (D)
• Weight: Approximately 0.35kg
• Operating Temperature: -25°C to +70°C (derate above 60°C)
• Storage Temperature: -40°C to +85°C
• Humidity: 5-95% RH non-condensing
• Protection Class: IP20 (front), IP10 (terminals)
• Certifications: CE, UL, cUL, IEC 60950-1

Selection Recommendations:
When specifying the DSPP4LT, consider total connected load (sum of relay consumption plus 20% margin), ambient temperature (derate 2.5% per °C above 60°C), input voltage availability, and cabinet space allocation. For redundant configurations, parallel multiple units with diode-OR modules. For applications requiring N+1 redundancy, consult our engineers regarding buffer module integration. Provide load profile, environmental conditions, and mounting constraints for application-specific guidance.

System Integration & Compatibility

Native ABB Relion Ecosystem Integration
Factory-tested and approved for use with ABB Relion 670, 650, 615, 611, and 531 series protection IEDs, ensuring plug-and-play compatibility with standardized terminal assignments and voltage levels per ABB application manuals.

Third-Party Device Support
Universal 24VDC output compatible with Siemens, Schneider Electric, GE, and SEL protection relays, PLCs, RTUs, and field instruments adhering to industry-standard control voltage specifications.

Communication Protocol Transparency
Clean DC output with minimal EMI ensures reliable operation of IEC 61850 GOOSE/MMS, Modbus RTU/TCP, DNP3, and Profibus communication interfaces without signal degradation or packet loss.

Parallel & Redundant Configurations
Supports parallel operation with current sharing for increased capacity or N+1 redundancy using external decoupling diodes (not included); consult factory for load-sharing module recommendations.

Delivery, Quality Assurance & Technical Support

Lead Time & Availability:
Standard catalog item with typical stock availability; standard orders ship within 3-5 business days. Custom voltage or extended temperature variants available with 4-6 week lead time for quantities above 10 units.

Warranty & Service:
Backed by ABB's standard 24-month warranty covering manufacturing defects and component failures. Extended warranty and advance replacement programs available for critical infrastructure applications. Technical support includes remote diagnostics, on-site commissioning assistance (region-dependent), and lifecycle management consulting.

Documentation & Compliance:
Each unit ships with installation manual, terminal wiring diagram, dimensional drawings, and CE/UL compliance certificates. CAD models (STEP, DWG), EPLAN macros, and IEC 61850 SCD files available for download from ABB Library. RoHS and REACH compliance statements provided upon request.

Quality Standards:
Manufactured in ISO 9001:2015 certified facilities with 100% functional testing including hi-pot, load regulation, and thermal cycling per IEC 60068 environmental test standards. Traceability documentation and test reports available for regulated industries.

Frequently Asked Questions (FAQ)

Q: How do I connect the DSPP4LT power supply module to my existing ABB Relion protection relay?
A: The DSPP4LT features screw-terminal connections clearly marked for AC/DC input (L, N, PE) and 24VDC output (+, -). Connect the output terminals to your Relion relay's auxiliary power input (typically terminals 1+ and 1-). Ensure input voltage matches your site's available power (88-264VAC or 110-300VDC). Refer to the relay's installation manual for specific terminal assignments and verify polarity before energizing. Torque terminals to 0.5-0.6 Nm.

Q: What is the maximum number of ABB Relion relays one DSPP4LT can power simultaneously?
A: The DSPP4LT provides 4A continuous output (96W at 24VDC). A typical Relion 670 relay consumes 8-15W depending on configuration and I/O modules. Conservatively, one DSPP4LT can power 4-6 standard relays. For precise calculation, sum the maximum power consumption of all connected devices (found in each relay's technical manual) and maintain 20% margin. For larger installations, use multiple DSPP4LT units or consider higher-capacity models.

Q: What energy savings or efficiency improvements can I expect compared to traditional linear power supplies?
A: The DSPP4LT's switching topology achieves >88% efficiency versus 50-60% typical for linear supplies, reducing heat dissipation by approximately 40-50%. In a cabinet with four 100W linear supplies, switching to DSPP4LT equivalents can eliminate ~160W of waste heat, potentially reducing cooling requirements and extending component lifespan. Actual savings depend on load profile and ambient conditions; payback period typically 18-24 months in continuously operated installations.

Q: What are the installation environment requirements and protection rating for this power supply?
A: The DSPP4LT is rated IP20 (front panel) and IP10 (terminal area), suitable for installation inside enclosed control cabinets or marshalling kiosks. Operating temperature range is -25°C to +70°C with derating above 60°C (reduce load 2.5% per °C). For outdoor or harsh environments, install in NEMA 4/IP54 minimum enclosures with adequate ventilation. Conformal coating options available for high-humidity or corrosive atmospheres (specify at order). Altitude rating: up to 2000m without derating.

Q: Does the DSPP4LT support remote monitoring or data acquisition via communication protocols?
A: The standard DSPP4LT is a standalone power supply without integrated communication interfaces. However, output voltage and current can be monitored using external shunt resistors or hall-effect sensors connected to your SCADA/DCS analog inputs. For applications requiring power supply status reporting, consider integrating with ABB's PCM600 or System 800xA platforms using discrete alarm contacts (requires external relay for fault signaling). Contact our engineering team for custom monitoring solutions or integration with IEC 61850 systems.

Q: Can I use the DSPP4LT in marine or offshore applications with wide voltage fluctuations?
A: Yes, the DSPP4LT's wide input range (88-264VAC or 110-300VDC) and robust transient protection make it well-suited for marine and offshore installations experiencing voltage swings from generator load changes or shore power variations. The unit meets IEC 60068-2-6 vibration and IEC 60068-2-27 shock standards. For marine classification society approvals (DNV, ABS, Lloyd's), specify requirements at order for certification documentation. Consider conformal coating option for salt-air environments and verify mounting orientation for vessel motion compliance.

Request Technical Support & Custom Solutions

For detailed application engineering, custom voltage configurations, or volume procurement, please provide the following information to our technical team:

• Project name and application type (substation, industrial, marine, etc.)
• Total connected load (watts) and number of devices to be powered
• Available input voltage and frequency at installation site
• Ambient temperature range and environmental conditions
• Quantity required and delivery timeline
• Special requirements (extended temperature, conformal coating, certifications)

Our application engineers will provide load calculations, wiring diagrams, panel layout recommendations, and competitive quotations within 24-48 hours for standard configurations.

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