Muller Digital SC DIN Rail Time Switch, 2-Channel, 230V AC, Programmable, DPDT, SC 28.21 PRO4 230V 50-60HZ

The Muller SC 28.21 PRO4 230V 50-60HZ Digital SC DIN Rail Time Switch is engineered for precise control of industrial, commercial, and HVAC automation systems. This highly programmable timer operates at 230V AC and offers robust functionality across two independent output channels. Its DPDT contact configuration enables versatile switching for applications such as lighting control, motor regulation, presence simulation, air conditioning, water pumps, and machinery.

The device supports daily, weekly, and even yearly programs by allowing extra switching times, and offers up to 100 memory spaces for complex scheduling needs. The time switch can be programmed via Bluetooth using a PC or smartphone, utilizing a free app for iOS, Android, or Windows, even when the supply is disconnected. This feature greatly enhances installation and commissioning flexibility.

Built-in manual permanent mode and override functions ensure that operators can quickly adjust schedules or bypass timed control when required. The permanent by date and holiday function enables facility-wide changes for holidays and exceptional use cases, while random and cycle functions aid in presence simulation and energy efficiency.

A 10-year battery reserve based on an exchangeable CR2032 cell ensures reliable operation during power outages or supply interruptions. Fully automatic daylight saving time adjustment eliminates manual reconfiguration as seasons change, reducing maintenance burden.

The compact form factor, with a 90mm height and 63mm depth, fits standard DIN rail installations. Featuring a robust build quality and adherence to DIN EN 60730-1, DIN EN 60730-2-7, ISO 15693, and RoHS standards, the timer is suitable for demanding environments and complies with current regulatory requirements. The terminal type is pull up, facilitating easy installation and wiring.

Industrial use cases include building automation, lighting (private, industrial areas, street and shop-window lights), air conditioning regulation, pumps, motors, presence simulation, and plant/machinery management. The unit's flexibility makes it a cornerstone for process control in manufacturing, water treatment, HVAC, and facilities management.

Programmable two-channel DIN rail time switch with DPDT contacts, suitable for process control and automation. Supports daily, weekly, and yearly timers with 100 memory locations and advanced scheduling options. Bluetooth programming via PC and smartphone application, even with supply disconnected.

Manual override, permanent by date/holiday mode, cycle and random functions enhance user control. 10-year battery life on replaceable CR2032 cell ensures uninterrupted timing functions and operational reliability. Fully automatic daylight saving adjustment simplifies maintenance for facilities management.

Built for industrial and commercial settings: lighting, HVAC, pumps, motors, and presence simulation. Complies with European DIN EN 60730, ISO 15693, RoHS standards for safety and environmental quality. Explore more industrial automation solutions in Process Control and Time Switches on EnvMart for the latest in programmable automation technology from Muller.