Overview
DOLD relays are precision electromechanical devices engineered for demanding industrial environments. The 0019079AD8851.19DC24V model is a 24V DC variant, part of DOLD's modular relay series designed for DIN-rail installation. These components serve as critical interfaces between control systems and power circuits, ensuring safe operation of heavy machinery and automated processes. Their robust construction meets international standards like IEC 60947 and UL 508.
Structure and Working Principle
The relay comprises an electromagnetic coil, movable armature, and bifurcated contacts. When energized, the coil generates a magnetic field pulling the armature to close the contacts, completing the circuit. A unique feature is the forced-guided contact mechanism (EN 50205 certified), which ensures fail-safe operation in safety-critical applications. The transparent housing allows visual inspection of contact status without disassembly.
Key Features
1. High switching capacity (up to 16A resistive load) 2. 3-pole contact configuration with NO+NC options 3. Wide operating temperature range (-25°C to +60°C) Additional features include mechanical life expectancy exceeding 10 million operations and built-in arc suppression for inductive loads. The LED operation indicator aids in quick troubleshooting.
Application Areas
Primary applications include: - Machine tool controls - Elevator safety circuits - HVAC systems - Conveyor belt interlocking These relays are particularly valued in safety systems due to their positive-driven contact design, which prevents simultaneous NO/NC contact closure – a critical requirement in emergency stop circuits.
Maintenance and Precautions
Regular inspection should check for contact erosion (recommended after 100,000 cycles under full load). Use dry compressed air for dust removal; never lubricate contacts. For optimal performance, maintain ambient humidity below 85% non-condensing. Always de-energize before servicing and verify insulation resistance (min. 100MΩ at 500V DC).
B2B Procurement Guide
Bulk purchases (50+ units) typically attract 12–18% discounts. Lead times vary from 2 weeks (stock items) to 8 weeks (custom configurations). Specify required certifications (e.g., ATEX for explosive environments). Consider purchasing spare contact blocks (sold separately) for high-cycle applications. Some distributors offer free technical support for system integration.
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