Belimo CR24-B2E - room temperature controller

Belimo CR24-B2E – single-room temperature controller

Controller with one analogue output and two digital outputs. Output ao1 is intended for controlling a VAV controller in the cooling sequence. Outputs do3/1 and do3/2 are used to control heating stages; the documentation also specifies open/close control of a radiator valve.

Key features and parameters

• Rated supply voltage: AC 24 V 50/60 Hz; rated voltage range: AC 19.2...28.8 V.
• VAV system output ao1: (0)2...10 V, max. 5 mA.
• Heating output do3: 2 stages, Triac, AC 24 V, max. source current 0.5 A / 10 VA.
• Outputs can be configured for a single-stage or two-stage electric heater in binary mode and for open/close control of a radiator valve.
• Mode selection and LED indication: AUTO (green), ECO (orange), MAX (red); setpoint correction knob ±3 K.
• Heating setpoint range: 15...36°C (default 21°C); internal NTC temperature sensor with a measuring range of 10...45°C.
• Energy hold off, Stand-by, frost protection and Boost functions, and supply air temperature limitation with an optional sensor.
• Input ai2 for external setpoint shift: 0...10 V corresponds to 0...10 K.
• 2x PP diagnostic port (for PC-Tool); screw terminals max. 1.5mm².
• IP30 degree of protection according to EN 60529.