Temperature controller with fan speed control, DIN rail mounting, contact: 1NO/NC 230V AC RT-833

Temperature controller with fan speed control – precise control in your system

This temperature controller, designed for DIN rail mounting, is a reliable solution for controlling the rotational speed of fans in control cabinets and similar installations. The device reacts to temperature changes, automatically adjusting the fan's operation, which ensures optimal operating conditions for devices and protects them from overheating. Thanks to its digital design and precise measurement, the RT-833 controller offers stable and efficient temperature control.

Functionality and application

The RT-833 controller is designed for direct control of 12/24 V DC powered fans. Its main task is to maintain the set temperature by smoothly regulating the fan's rotational speed. The built-in changeover contact (1NO/NC) with a load capacity of 10A at 230V AC can be used to signal exceeding the permissible temperature or controller failure. This is an additional system safeguard that informs about potential problems.

Key features for installers:

• DIN rail mounting: Quick and easy mounting in standard control cabinets.
• 1 module width (18 mm): Compact dimensions allow for space saving.
• 2.5 mm² screw terminals: Allows connection of wires of different thicknesses.
• Relay output: Additional signaling function increasing system safety.
• Start-up function at maximum speed: Prevents the fan motor from "getting stuck" at low speeds.

Benefits for the end user:

• Precise temperature control: Ensures optimal operating conditions for temperature-sensitive devices.
• Overheat protection: Protects devices from damage caused by excessive temperature.
• Energy saving: Adjusting the fan's rotational speed allows for reducing energy consumption.
• Extended device life: Stable operating temperature translates to a longer life of components.

Specification and operating parameters

The RT-833 controller is characterized by high temperature measurement accuracy (±1°C) and a wide adjustment range (25-60°C for Tmin and 5-30°C for ΔT). It has one memory location and one control channel. The device is adapted to work in an ambient temperature from -15°C to +50°C and has a protection class of IP20, which means protection against touching with a finger and solid objects larger than 12.5 mm. For correct operation, it requires a temperature probe of type RT or RT2 (available separately). The rated switching current is 10A both at 250V and 230V AC, which ensures compatibility with most standard loads. The power consumption in standby mode is only 0.05W, and in operating mode 0.6W – making it an energy-saving solution.