The **M2TT-15-R2/CE** is a high-precision, industrial-grade **Solid State Timer** (frequently associated with brands like Crouzet or similar industrial control manufacturers). It is designed for DIN rail mounting and is used to control the timing of electrical circuits in automation systems. --- ### 1. Core Technical Specifications The electrical characteristics define how the unit interfaces with a power source and the load it controls. | Feature | Specification | | :--- | :--- | | **Supply Voltage** | 24V DC / 24-240V AC (Multi-voltage) | | **Output Type** | Relay (Changeover contact / SPDT) | | **Current Rating** | Typically 5A to 8A at 250V AC | | **Time Range** | 0.1 seconds to 100 hours (Selectable) | | **Mounting** | 17.5mm DIN Rail Mount | | **Approval** | CE Marked (Compliance with EU safety/EMC) | --- ### 2. Internal Electronic Components The device is comprised of several key stages that allow it to perform timing functions accurately: * **Switch Mode Power Supply (SMPS):** Allows the device to accept a wide range of input voltages (AC or DC) without manual switching. * **Microcontroller / ASIC:** The "brain" that counts pulses from an internal oscillator to ensure high repeat accuracy (usually <0.5%). * **Potentiometers:** High-precision variable resistors located on the front face used to set the time delay and time scale. * **Electromechanical Relay:** The final stage that physically opens or closes the circuit. It provides galvanic isolation between the control logic and the load. * **LED Indicators:** * **Green LED:** Power supply status. * **Yellow LED:** Relay output status (On/Off). --- ### 3. Functional Modes The "R2" in the part number often indicates specific wiring or dual-relay configurations. Common functions include: 1. **Delay on Energization (A):** The timer starts when power is applied; the relay flips after the set time. 2. **Symmetric Flasher (L/Li):** The relay switches on and off repeatedly at equal intervals. 3. **Interval (H):** The relay switches on immediately when power is applied and switches off after the set time. --- ### 4. Wiring and Terminal Layout Standard industrial timers of this series follow a specific terminal convention: * **A1 / A2:** Power supply inputs. * **15 (Common):** The input pole of the relay. * **16 (NC):** Normally Closed contact. * **18 (NO):** Normally Open contact. ---