Phoenix Contact REL-IR2/L- 24AC/2X21 Industrial Relay (Product Code: 1109555)
The Phoenix Contact 1109555 (Type Designation: REL-IR2/L- 24AC/2X21) is a plug in, industrial grade miniature “ice cube” power relay designed for signal isolation, circuit amplification, and contact multiplication within automated control systems. Part of the ESSENTIAL edition product series, it features a clear plastic housing that allows for immediate visual inspection of its internal copper coil, status indicators, and contact points.
Key Features
-
Dual Pole Changeover Layout: Features 2 PDT (double pole, double throw / 2 changeover) completely independent contacts, allowing a single control signal to manage two separate electrical circuits simultaneously.
-
AC Voltage Optimization: Built with a specialized 24V AC operating coil, matching standard alternating current auxiliary control loops in industrial machinery panels.
-
Manual Mechanical Testing: Outfitted with a prominent red test button on the top faceplate (color coded specifically for AC coil variants). This lets technicians manually toggle the relay contacts to test downstream logic paths without needing to power the coil circuit.
-
Visual Status Indicators: Equipped with an integrated yellow status LED alongside a mechanical position flag indicator for quick visual diagnostic verification.
-
High Load Capacity: Rated to continuously handle up to 2x 12A at a maximum switching voltage of 250V AC/DC, offering heavy duty reliability for aggressive field actuator demands.
Technical Specifications
| Feature | Specification |
| Model Designation | REL-IR2/L- 24AC/2X21 |
| Ordering Code / Part No. | 1109555 |
| Brand / Manufacturer | Phoenix Contact |
| Product Family Class | ESSENTIAL edition |
| Nominal Coil Input Voltage | 24V AC (50/60Hz systems) |
| Contact Configuration | 2 Changeover / PDT Contacts |
| Limiting Continuous Current | 12 A per contact tier |
| Maximum Switching Voltage | 250V AC / 250V DC |
| Contact Material | Silver Nickel (AgNi) |
| Global Standards & Approvals | cRUus Recognized (UL / CSA compatibility), CE Compliant |
Applications
-
Machine Safety Interlocking loops: Connects directly into 24V AC machinery control strings to safely branch off status loops, sirens, or safe top logic routines across two isolated lines.
-
PLC Circuit Coupling: Interfaces with standard 24V AC programmable logic controller output modules to switch high power industrial loads like large contactors or motor starter blocks.
-
HVAC Control Enclosures: Widely utilized in commercial climate control and air handler units where 24V AC transformer loops natively power the primary control infrastructure.
-
Galvanic Isolation Gates: Establishes a rugged dielectric shield between microelectronic processor components and harsh field components, protecting the control logic from electrical back EMF surges.
