Phoenix Contact REL-IR-BL/L- 24DC/4X21 Industrial Relay (Product Code: 1032527)
The Phoenix Contact 1032527 (Type Designation: REL-IR-BL/L- 24DC/4X21) is a plug in, miniature “ice cube” style industrial power relay designed for signal isolation, logic multiplication, and circuit amplification in automated electrical systems. Part of the ESSENTIAL edition product series, this relay features a high density, multi pole design enclosed in a transparent housing that allows for easy visual inspection of the internal copper coil and contact blocks. Optimized for low voltage direct current control circuits, it acts as a reliable interface between digital controller outputs and higher power field actuators.
Key Features
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4 Changeover Contact Configuration: Outfitted with 4 PDT (double pole, double throw / 4 Form C) completely independent contacts, enabling a single control signal to switch up to four completely isolated downstream circuits simultaneously.
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Low Voltage DC Operating Coil: Built with a highly efficient 24V DC input coil, matching the standard voltage architecture natively used by modern industrial programmable logic controllers (PLCs).
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Manual Mechanical Testing Key: Features a prominent blue manual test button on the top faceplate, color coded specifically for direct current (DC) coil variants. This allows commissioning technicians to manually actuate the contacts and verify downstream loop logic without energizing the coil circuit.
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Visual Status Verification: Equipped with an integrated yellow status LED alongside a mechanical position flag indicator for reliable, dual layer contact state diagnostics.
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Durable Silver Nickel (AgNi) Contacts: Built with premium silver nickel alloy contact surfaces that offer excellent resistance to electrical arcing and material wear, translating to a massive mechanical service life of up to 30,000,000 operational cycles.
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Clear Faceplate Schematic Layout: Features an absolute wiring pinout diagram printed directly on the front faceplate (11 through 44 and coil inputs A1-A2), reducing tracking and troubleshooting errors in the field.
Technical Specifications
| Feature | Specification |
| Model Type / Designation | REL-IR-BL/L- 24DC/4X21 |
| Ordering Code / Part Number | 1032527 |
| Brand / Manufacturer | Phoenix Contact |
| Product Family Class | ESSENTIAL edition |
| Nominal Coil Input Voltage | 24V DC |
| Contact Arrangement Type | 4 PDT / 4 Changeover Contacts |
| Limiting Continuous Current | 6 A per contact tier |
| Maximum Switching Voltage | 250V AC / 250V DC |
| Typical Coil Current (I_N) | 38 mA |
| Physical Dimensions | Width:22.5mm| Height:28mm| Depth:35.5m |
| Global Standards & Approvals | cRUus Recognized (UL / CSA compatibility), CE Compliant |
Applications
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PLC Output Signal Multiplication: Interfaces directly with 24V DC programmable logic controller output cards to safely duplicate a single status instruction into four completely independent control lines.
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Industrial Panelboard Automation: Functions as a robust signal coupling node within packaging lines, automotive assembly systems, textile machinery, and materials handling conveyors.
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Galvanic Protection Isolation Gates: Establishes a highly resilient dielectric barrier between sensitive microelectronic processors and harsh field components, protecting logic units from destructive inductive back EMF surges.
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Safety & Interlocking Control Schemes: Integrated into control cabinets to manage secondary interlocks, sound audible alarm horns, or isolate low voltage safety parameters before high power machinery lines are enabled.
