Industrietechnik
Controller with active frost protection for 3-point actuator
Controller intended for control of valve actuators in water-heated systems. It has a built-in room sensor and can be used for control of supply air temperature or room temperature, with or without cascade control. The controller has built-in active frost protection with two alarm relays and automatic heat maintaining function during shutdown.
Articles
(1 st)-
RA-CTA- Power Supply
- 24VAC (22...26 V AC 50/60Hz / ), VA
- Dimensions, external (WxHxD)
- 93x153x40 mm
- Control signal (output)
- 3-point floating control, 24V AC output (heating)
- Sensor inputs
- Three 0...30°C (Sensor determines the range (NTC sensor))
- Setpoint
- 0...30°C
- Minimum limit
- 0...30°C
- Frost alarm setpoint
- 5 °C
- Shutdown mode setpoint
- 25°C
- Fan relay
- Breaking contact for fan contactor interlock if a frost protection alarm occurs, 230V AC. 3A
- Alarm relay
- Change-over contact for alarm indication if a frost protection alarm occurs, 24VAC, 2A
Specifications
| Protection class | IP20 |
|---|---|
| Ambient humidity (non-condensing) | 0…90 % RH |
| Storage temperature | -40…50 °C |
| Mounting | Wall |