TELE VDE0435

Helo OVP 1 Manual Override Module for HVAC and Automation Description The Helo OVP 1 is a compact and reliable manual override control module designed for DIN rail mounting. It is widely used in building automation and HVAC systems to allow for manual intervention in 0-10V DC control loops. This unit features a three-position selector switch (Hand-0-Auto) and an adjustable potentiometer for precise manual control. It operates on a standard 24V AC/DC power supply and includes a relay output for status feedback. Specifications Manufacturer: Helo Model: OVP 1 Type: Manual Override Control Module Supply Voltage: 24V AC/DC Control Signal Input/Output: 0-10V DC Relay Output Rating: 28V / 2A Mounting: DIN Rail Switch Positions: Hand – 0 – Auto Label Info VDE 0110 IGr. C/250 VDE 0435 CE Marked Application This module is ideal for applications where manual control of actuators, such as dampers and valves, is required. It provides an essential interface for maintenance, commissioning, or emergency operation in HVAC systems, allowing technicians to bypass the automatic controller. Country of Origin Germany CO2 Impact By purchasing this refurbished Helo OVP 1, you are helping to avoid 4.0 kg of CO2 emissions. This saving is equivalent to the CO2 captured by a tree in several months or driving an average car for 20 kilometers. Choosing reused industrial parts is a sustainable choice for your business and the planet. Availability This item is a tested, used product in excellent working condition. Order now from profideals for expert support and fast delivery. FAQ What is the function of the ‘0’ position on the selector switch? The ‘0’ position typically de-energizes the output, forcing the connected actuator or device to its fail-safe position (e.g., closing a valve), effectively overriding both automatic and manual commands. Can the 28V/2A relay output (B1/B2) be used to switch a mains voltage load? No, the relay output is rated for a maximum of 28V. It is a low-voltage contact intended for signaling purposes, such as providing feedback to a building management system (BMS) about the switch’s status (e.g., in manual mode). It should not be used for switching 230V or other mains voltages. In ‘HAND’ mode, what does the rotary dial control? In ‘HAND’ mode, the rotary dial acts as a potentiometer, allowing you to manually set the 0-10V DC output signal (at terminal Y). This lets you manually position a connected actuator (like a damper or valve) to any point between 0 percent and 100 percent open, independent of the automatic control signal. Last Update: Friday, March 13, 2026 profideals is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners.