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The Eelectron HA04A01KNX is a 4-channel KNX heating actuator for thermoelectric (electrothermal) valve drives, with 4 Triac outputs that accept 24 V AC or 230 V AC actuators and 4 dry-contact inputs on the same 4-module DIN device. It is the standard way to run radiator valves, underfloor-heating manifolds and zone valves from the panel: each output drives up to 3 valves at 24 V or 4 at 230 V in ON/OFF or PWM mode, and outputs can be paired for 3-point valves.
The inputs make it a complete zone controller. Inputs 1–4 take pushbuttons, window contacts or NTC probes, and the device hosts up to 8 complete 2-stage PI thermostat modules (4 linked to the probe inputs plus 4 additional), so a hotel floor or a small office can be regulated without wall thermostats. Eight logic blocks with proportional-control and dew-point algorithms round out the application.
| Power supply | Via KNX bus, 21–32 V DC (SELV) |
| Current consumption | ≤ 15 mA (8-output version); ≤ 10 mA (4-output version) |
| Triac outputs | 4; 24 V AC to 230 V AC, 50/60 Hz; rated current 500 mA per output |
| Inrush current | 4 A per group of 4 outputs |
| Max valves per output | ≤ 3 at 24 V AC; ≤ 4 at 230 V AC (depends on valve manufacturer inrush) |
| Inputs (digital mode) | 4 dry-contact inputs (SELV circuits); scanning voltage 3.3 V DC; max cable 30 m (98 ft) twisted |
| Inputs (analog mode) | NTC probes TS01A01ACC (-20 to +100 °C), TS01B01ACC (-50 to +60 °C); max cable 30 m (98 ft) twisted |
| Thermostat modules / logic blocks | 8 / 8 |
| Terminals | Max 2.5 mm² (approx. 14 AWG) solid or stranded |
| Group addresses / associations | 250 / 250 |
| Mounting | DIN rail, 4 modules; LV distribution cabinet |
| Enclosure | PC-GF, IP20 (EN 60529) |
| Operating temperature | -5 °C to +45 °C (23 °F to 113 °F) |
| Storage temperature | -20 °C to +55 °C (-4 °F to 131 °F) |
| Relative humidity | max 90 % non-condensing, indoor use |
| Standards | EN 63044-3; EN 63044-5-1 / EN 63044-5-2; EN 50491-2; LVD 2014/35/EU; EMC 2014/30/EU |
| Certifications | KNX certified; CE |
| ETS application | HAxxA01KNX heating actuator application |
| Weight (net) | 0.26 kg (0.57 lb) |
| Manufacturer part no. / GTIN | HA04A01KNX / 8054144521152 |
Sibling: HA08A01KNX (8 Triac outputs, 8 inputs). Mixed valve + relay version: HA88B01KNX (4 Triac + 4 x 16 A relays, 8 inputs). Accessories: NTC probes TS01A01ACC / TS01B01ACC; LEDs LD00A01ACC / LD00A11ACC. Fan coil control with 0–10 V valves: TC57A01KNX / TC28A01KNX.
CE certified; not UL/NRTL listed — verify local code requirements before specifying in US installations.
Datasheet (PDF) · Available to order.
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