---
title: Device overview
description: "## Connections and displays 230 V ![](https://faqdoc.info/wp-content/uploads/2024/02/AdBB_Bx1902-08N2.svg) 1 - Boiler connection 2 - Pump connection 3 - Protective conductor connection (only for 230 V) 4 - Voltage supply 5 - Fuse 6 - Temperature limiter or dew point sensor 7…"
url: "https://faqdoc.info/en/systemauswahl/alpha-direct-en/alpha-direct-balance-base-station/device-overview/"
updated: "2026-09-29"
category: Alpha direct Balance base station
---

# Device overview

## Connections and displays 230 V

![](https://faqdoc.info/wp-content/uploads/2024/02/AdBB_Bx1902-08N2.svg)

1 - Boiler connection
2 - Pump connection
3 - Protective conductor connection (only for 230 V)
4 - Voltage supply
5 - Fuse
6 - Temperature limiter or dew point sensor
7 - Heating/cooling change-over
8 - Reduction channel, external timer
9 - Thermostat connection
10 - LED
11 - DIP switch "disable cooling"
12 - Connection of actuators
13 - Strain relief

## Technical data

| Operating voltage: | 24 V ±20 %, 50 Hz, |
| --- | --- |
|  | 230 V ±10 %, 50 Hz |
| Power consumption: | max. 50 VA |
| Power consumption (idle): | <1 W |
| Fuse: | 24 V: T2A / 230 V: T4AH |
| Connectable room thermostats: | max. 8 |
| Connectable actuators, type: | A 20x05, AST 20x05, A 40x05, AST 40x05 |
| Connectable actuators: | max. 17 actuators |
| The following applies to other actuators than those mentioned above |  |
| Inrush current per actuator: | 230 V: max. 500 mA |
| max. permitted nominal load of the connectable actuators: | 24 V: max. 24 W |
| Pump control switching power: | 2 A, 200 VA induktiv |
| Switch-on delay: | 2 minutes |
| Follow-up time: | 2 minutes |
| Boiler control switching power: | 2 A, 200 VA induktiv |
| Switch-on delay: | 2 minutes |
| Follow-up time: | 2 minutes |
| Pump protection function: | 3 days / 5 min. |
| Valve protection function: | 16 days / 5 min. |
| Control direction of actuators: | NC |
| Ambient temperature: | 0 to 50 °C |
| Storage temperature: | -20 to 70 °C |
| Ambient humidity: | 80 %, non-condensing |
| ERP class acc. to EU 811/2013: | 1=1 % |
| Contamination degree: | 2 |
| Rated surge voltage: | 1500 V |
| Protection class: | 24 V: III / 230V: II |
| Protection type: | IP 20 |
| Function: | Type 1 / type 1.C |
| Dimensions (H x L x D): | 90 x 326,5 x 52 mm |