Sensor adjusts fan speed in response to temperature change

Providing a simple and cost effective solution to the problem of fan-and-filter units running continuously, even when not required as the panel temperature is already at an acceptable level, the sensor will help to reduce energy consumption and consequently, running costs.

With a fixed setpoint of 35°C, the device provides continuous control with fan speeds varying linearly between 10% at 20°C and 100% at 35°C. No additional power supply is required as the sensor takes a 10V DC feed from the fan-and-filter unit itself.

Larger TopTherm fan-and-filter units with EC motors from Rittal, accept a 0-10V DC or PWM control signal and can be controlled using a programmable logic controller (PLC). A tachometer signal output to monitor fan speed and operating conditions is included, to alert users immediately should any faults or failures occur.

Rittal’s simple fan-and-filter unit is an innovative product with integrated energy efficient control, performance monitoring and sensor for speed control to achieve the best results.