The **M2SES-2CC-R/UL** is a high-performance, plug-in type industrial electromagnetic relay produced by **IDEC**. It belongs to the **RU series** (specifically the Universal Relay line), designed for high reliability in control panels and automation systems. --- ### 1. General Specifications The part number can be broken down into specific technical attributes: | Feature | Specification | | :--- | :--- | | **Contact Form** | DPDT (2 Form C) | | **Mounting Type** | Plug-in (compatible with DIN rail or PCB sockets) | | **Status Indicator** | Built-in Mechanical Indicator & LED | | **Rated Load** | 10A @ 250V AC / 30V DC (Resistive) | | **Terminal Style** | Blade terminals | | **Safety Approvals** | UL Recognized, CSA Certified, CE Marked | --- ### 2. Key Electronic Components & Features The device operates using electromagnetic induction to switch high-power circuits using a low-power control signal. #### A. The Coil Unit * **Voltage Options:** Usually available in standard voltages (24VDC, 120VAC, 240VAC). The specific coil voltage is usually printed on the side of the casing. * **Power Consumption:** Optimized for low power consumption to reduce heat buildup in dense control panels. #### B. The Contact System * **Bifurcated Contacts:** Many RU series relays use gold-clad contacts or high-conductivity silver alloys to ensure low contact resistance. * **DPDT Configuration:** It contains two independent sets of "Double Pole Double Throw" contacts, allowing it to control two separate circuits simultaneously. #### C. Visual Diagnostics * **LED Indicator:** A built-in green (DC) or red (AC) LED provides an immediate visual cue if the coil is energized. * **Mechanical Flag:** A physical orange lever/flag moves when the armature is pulled, allowing troubleshooting even if the power is off or the LED fails. * **Manual Latching:** Features a "check button" (often green for DC, red for AC) that allows technicians to manually trip the relay for testing. --- ### 3. Connection Pinout (Typical 8-Pin) For a 2-pole relay like the M2SES-2CC-R/UL, the standard wiring configuration is: | Pin Number | Function | | :--- | :--- | | **1 & 8** | Coil Terminals | | **2 & 7** | Common (COM) | | **3 & 6** | Normally Closed (NC) | | **4 & 5** | Normally Open (NO) | --- ### 4. Environmental & Durability * **Vibration Resistance:** Designed to withstand industrial environments without accidental contact chatter. * **Environmental Protection:** The "R" in the series often signifies a solder-flux protected or dust-protected construction. * **Non-Polarized LED:** Includes a protection diode (for DC models) to prevent damage from reverse polarity.