Time relay PCU-518 with external time setting potentiometer PCU-518DUO

Multifunction time relay – precision and flexibility in automation

The PCU-518DUO time relay is a reliable device designed for time control in a wide range of applications – from industrial automation and heating and ventilation systems to lighting and signaling. Its versatility stems from the ability to configure four different operating modes and a wide range of time settings. DIN rail mounting simplifies integration with existing electrical infrastructure, and an external potentiometer allows for precise setting of operating parameters without the need to open the housing.

Functionality and technical parameters

The device offers four functions: delayed-off, delayed-on, cyclic operation starting with a pause, and cyclic operation starting with activation. The time setting range is impressive – from 0.1 seconds to as much as 24 days, allowing it to be adapted to almost any application. The relay operates on both alternating current (AC) and direct current (DC) in the range of 24-230V, which increases its flexibility. The switching contact with a load capacity of up to 8A (250V AC) allows control of various receivers. Additionally, it has a work status indicator using LED diodes – green (power supply) and red (contact status).

The external potentiometer (ZP-18) connected using a 3x0.42 mm² cable with a length of 70 cm provides convenient time adjustment without the need to interfere with the device's wiring. Thanks to this, settings can be modified quickly and easily, even in hard-to-reach places.

The supply voltage is in the range of 24-230 V AC/DC. The rated switching current is 8 A at 250 V AC. It has one NO/NC switching contact. The time adjustment range is from 0.1 seconds to 24 days. It offers four operating modes: delayed-off, delayed-on, and two types of cyclic operation. Mounting is on a DIN rail, and the operating temperature is in the range of -25°C to +50°C.

Applications and benefits for installers and end users

The PCU-518DUO relay is used wherever precise time control is required. Installers will appreciate the ease of mounting on a DIN rail and the intuitive operation thanks to the external potentiometer. The wide range of supply voltages eliminates the need to use many different models in one project. End users benefit from a reliable device with high functionality, which allows for optimization of automation system operation and energy savings. The ability to choose different operating modes makes the relay ideal for a variety of applications – from simple lighting control tasks to more complex industrial automation systems. Additionally, the high switching capacity allows control of both resistive (light bulbs) and inductive (fluorescent lamps) loads.