Phoenix Contact REL-IR4/LDP-110DC/4X21 Industrial Relay (Product Code: 1109560)
The Phoenix Contact 1109560 is a plug in, industrial grade miniature “ice cube” power relay engineered for electrical isolation, signal multiplication, and interlocking logic within automated control setups. Housed in a clear protective shell for simple optical maintenance checks, this device acts as an efficient high density interface between industrial controller outputs and field actuators.
Key Features
-
4 Changeover Contact Configuration: Outfitted with 4 PDT (4 Form C / changeover) independent contacts, enabling a single input control signal to simultaneously switch up to four completely isolated downstream circuits.
-
Integrated Suppression Diode & Status LED: Built with an internal damping freewheeling diode (
LDP) in parallel with the coil network (A1-A2) to eliminate inductive voltage spikes during drop out, accompanied by an integrated status LED for clean optical diagnostic tracking. -
Manual Mechanical Testing Key: Features a prominent blue mechanical test button on the top faceplate, color coded for DC control coils. This allows field technicians to force switch the contacts to test downstream logic loops without energizing the system coil.
-
Hard Wearing Contact Material: Built with premium silver nickel (AgNi) contacts that offer excellent resistance to electrical arcing and material transfer, translating to a long operational life under inductive load conditions.
-
Continuous Position Tracking: Features an integrated mechanical flag indicator alongside the LED, providing reliable, dual layer contact status verification under any lighting conditions.
Technical Specifications
| Feature | Specification |
| Model Designation | REL-IR4/LDP-110DC/4X21 |
| Ordering Code / Part No. | 1109560 |
| Brand / Manufacturer | Phoenix Contact |
| Nominal Coil Input Voltage | 110V DC |
| Contact Type Configuration | 4 Changeover / PDT Contacts |
| Limiting Continuous Current | 6 A per contact tier |
| Maximum Switching Voltage | 250V AC / 250V DC |
| Coil Circuit Protection | Integrated Freewheeling Diode (Polarized: A1+, A2-) |
| Global Standards & Approvals | cRUus Recognized (UL / CSA compatibility), CE Compliant |
Applications
-
High Voltage DC Control Infrastructure: Ideal for substation control panels, power generation facilities, and transit rail infrastructure where 110V DC battery banks natively run the safety auxiliary loops.
-
Multi Channel Logic Replication: Used within critical interlocking logic to simultaneously duplicate a single system status signal across four distinct diagnostic, monitoring, or secondary safety systems.
-
Heavy Industrial Automation Panels: Serves as a robust isolation coupling gate inside automotive assembly loops, large chemical processing plants, and water distribution facilities.
-
Galvanic Protection Barrier: Establishes a highly resilient dielectric shield between delicate digital control inputs and aggressive inductive loads, such as high current motor starter coils, hydraulic solenoids, and heavy brakes.
