The DRM series from Weidmüller consists of electro...

The DRM series from Weidmüller consists of electromechanical relays designed for DIN rail mounting. They serve as interface relays between control systems (like PLCs) and field devices (like motors, valves, sensors). They're known for reliability, compactness, and easy integration in industrial control panels. 🧩 Key Components of a DRM Relay Module Relay coil (with DC or AC voltage ratings) Relay contact (SPDT, DPDT – single/double pole) LED indicator (for coil status) EMC suppression module (optional) Socket base (pluggable relay design) Push-in or screw terminals for wiring 🔌 Types and Variants Weidmüller offers several DRM relay modules tailored to different tasks: ✅ Based on Contact Configuration: SPDT (Single Pole Double Throw) – 1CO (changeover contact) DPDT (Double Pole Double Throw) – 2CO (2 changeover contacts) ✅ Based on Coil Voltage: DC: 12V, 24V, 48V AC: 24V, 110V, 230V ✅ With or Without Features: With LED (coil status indication) With freewheeling diode (for DC coils) With RC network or varistor (for AC coils) ✅ Miniature DRM versions Compact size for tight control panels 🔧 Key Features DIN rail mountable with modular base Long electrical life (millions of switching cycles) Up to 8A switching current Voltage isolation between input/output Tool-free wiring options (push-in terminals) Cross-connectable for simplified wiring in I/O applications Pluggable relays make replacement easy without rewiring 📘 Typical Part Number Example DRM 1CO 24VDC LED DRM – Series name 1CO – 1 Changeover Contact (SPDT) 24VDC – Coil voltage LED – Built-in LED status indicator 🌐 Applications PLC and control system interfacing Switching inductive loads (contactors, valves) Signal isolation Alarm systems Machine automation Building management systems 🛠️ Installation & Usage Tips Mount directly on DIN rail (TS35) Use jumpers or cross-connectors for commoning Ensure correct coil voltage before applying power Choose appropriate contact type for your load (AC/DC, resistive/inductive) Use accessories like retention clips, marker tags, or diodes for customization 🧾 Related Accessories Relay bases/sockets Replacement relays (for same base) ZQV cross-connection bridges Marker strips (for labeling circuits) 📊 Comparison to Solid State Relays (SSR) Feature DRM Electromechanical SSR Load type AC/DC, general-purpose Typically AC or DC only Switching speed Moderate Very fast Life span Shorter (mechanical) Longer (no moving parts) Cost Generally lower Typically higher Isolation Yes Yes