Wieland SNE 4004K/KV Relay Expansion Unit | Relay Expansion Unit

Description

SNE 4004K: The SNE 4004K is a versatile control device designed to regulate the supply voltage and enable current paths in basic devices. Upon receiving the supply voltage, its integrated relays K1 and K2 swiftly switch to the ON position, allowing the power flow to the connected devices. Four enabling current paths are then closed, while the feedback current path Y1/Y2 remains open. Convenient LED indicators display the status of relays K1 and K2. In the event of an emergency, such as pressing the stop button, the enabling current paths open, instantly switching the relays back to the OFF position and cutting off the power flow. Thanks to the feedback current path, the SNE 4004K ensures the basic device won’t resume operation until K1 or K2 releases the circuit.

SNE 4004KV: Introducing the SNE 4004KV, an advanced control device with similar functionalities to the SNE 4004K, yet enriched with added capabilities. This device boasts four selectable OFF-delay times (tR1) of 0.5 s, 1 s, 2 s, and 3 s, enabled through innovative capacitors. Notably, the OFF-delay time elapses in its entirety, even in cases of power supply failures, and cannot be reset prematurely. Once the specified delay time has passed, the device’s reliable relays K1 and K2 automatically switch to the OFF position, discontinuing power flow. Furthermore, this device adheres to stop category 1 for OFF-delay times greater than 0 s, ensuring heightened safety and precision in power control applications. Ideal for applications that require precise timing and assured power-down sequences.