Belimo CR24-A1 - room temperature controller

Belimo CR24-A1 – single-room temperature controller

CR24-A1 is a variant of the CR24-B1 controller with the same functionality, but without operating elements. One analogue output ao1 is used to control VAV controllers; in changeover applications, the mode can switch from cooling to heating via an input.

Key features and specifications

• One control sequence and one analogue output ao1: (0)2 ... 10 V, max. 5 mA; output signal according to the product description: 2...10 V.
• Power supply: AC 24 V 50/60 Hz; nominal voltage range: AC 19.2...28.8 V.
• Control characteristic: P; selectable P band for heating / cooling: 1.5 / 1.0 K or 3.0 / 2.0 K.
• Heating setpoint range: 15...36°C (default 21°C); temperature measured by an internal NTC sensor with a range of 10...45°C.
• Inputs: 2 analogue and 2 digital; supports connection of an external NTC temperature sensor, 5 kΏ, with a measuring range of 10...45°C, and a setpoint shift signal of 0...10 V corresponding to 0...10 K.
• Functions: Energy hold off, Stand-by, cooling and heating changeover, and frost protection activated below 10°C. The Stand-by input is not available in changeover mode or in heating controller applications.
• Connection via screw terminals, max. 1.5mm²; IP30 protection rating according to EN 60529.
• Dimensions (H × W × D): 99x84x32 mm; weight: 105 g.