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The Eelectron BO08S02KNX is an 8-channel KNX switching actuator with 20 A relays, aimed at heavy lighting circuits, receptacle loads and plant equipment in commercial and hospitality panels. It is the output-only companion of the BO08S01KNX: the same 20 A relay block, interlock and logic engine, without the current-measurement circuitry, for panels that do not need per-circuit metering.
Each relay is configured independently for lights or generic loads, and groups of up to 8 relays can be combined with logic interlock for special sequences. Eight logic blocks handle threshold, logical and algebraic expressions locally. Toggle switches under the cover allow manual ON/OFF of every circuit for maintenance, and front LEDs show contact state. Because the relays do not switch simultaneously, three-phase loads must not be split across groups of 3 relays.
| Power supply | Via KNX bus, 21–32 V DC (SELV) |
| Current consumption | ≤ 12 mA; ≤ 25 mA for 80 ms per relay during switching |
| Outputs | 8 relays; AC1 20 A / 230 V ±10 % (cos φ ≥ 0.8), 16 A / 230 V (cos φ ≤ 0.8) |
| Max peak current | 500 A / 2 ms |
| Load limits | Resistive 20 A; incandescent 16 A; motor 10 A; fluorescent 10 A (230 V AC ±10 %); LED drivers: check inrush against relay peak rating |
| Mechanical life | 1 x 10⁶ switching operations minimum |
| Logic blocks | 8 |
| Terminals | Max 6 mm² solid; rated 20–10 AWG (0.5–5 mm²); M3.0 screw, 0.5 Nm |
| Group addresses / associations | 250 / 250 |
| Mounting | DIN rail, 8 modules; LV distribution switchboard |
| Enclosure | PC-GF, IP20 (EN 60529) |
| Operating temperature | -5 °C to +45 °C (23 °F to 113 °F) |
| Storage temperature | -25 °C to +55 °C (-13 °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 | BO08S0xKNX switching actuator application |
| Weight (net) | 0.25 kg (0.55 lb) |
| Manufacturer part no. / GTIN | BO08S02KNX / 8054144524467 |
Sibling: BO08S01KNX (adds true-RMS current sensing and load control). For 16 A circuits with inputs and thermostats see the F-series IO08F01KNX / BO08F01KNX; for a lean 16 A switch actuator see BO08K01KNX. Bus power from PS00D03KNX or PS00D04KNX; whole-installation metering can be added with PM30E01IRE + PM00A00IRI.
CE certified; not UL/NRTL listed — verify local code requirements before specifying in US installations.
Datasheet (PDF) · Available to order.
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