ABB SA/S2.16.6.1 KNX 2-Fold Switch Actuator 16/20A C-Load with Current Detection MDRC
The ABB SA/S2.16.6.1 is a high-performance 2-fold KNX switch actuator from ABB's i-bus® KNX range, designed for intelligent building automation. Featuring built-in load current detection per output channel, this DIN rail-mounted device enables precise monitoring and switching of capacitive (C-Load) and standard electrical loads — making it ideal for modern smart building installations.
- 2 independent output channels with floating contacts, each individually controlled via KNX
- Built-in load current detection per output (detection range: 0.02–20 A, accuracy: ±2%)
- Supports C-Load (capacitive load) including fluorescent lighting up to 16/20 AX at 250 V AC
- No additional power supply required — operates directly on KNX bus voltage (21–31 V DC)
- Manual actuation button with integrated contact position indicator on each channel
- ETS-parameterized for flexible commissioning, including copy/exchange of output settings
- DIN rail (MDRC) modular design, 2-module width (36 mm)
| Parameter | Value |
|---|---|
| Model | SA/S2.16.6.1 |
| Article Number | 2CDG110112R0011 |
| Number of Outputs | 2 (floating contacts) |
| Rated Voltage | 250 V AC / 440 V AC (50/60 Hz) |
| Rated Current | 16 A (AC31) / 20 A (AC11, C-Load, AX) |
| DC Switching Capacity | 20 A / 24 V DC (resistive load) |
| Minimum Switching Capacity | 100 mA / 12 V AC or 24 V AC |
| Current Detection Range | 0.02 A – 20 A (sinusoidal) |
| Detection Accuracy | ±2% of actual value ± 20 mA |
| Measurement Update Speed | ~320 ms scan cycle, 300 ms low-pass filter |
| Bus Voltage | 21–31 V DC (KNX) |
| Bus Current Consumption | < 12 mA |
| Bus Power Consumption | Max. 250 mW |
| Mechanical Service Life | > 1,000,000 switching cycles |
| Electrical Service Life (AC11) | > 1,000,000 switching cycles |
| Mounting | DIN rail (MDRC), 35 mm |
| Module Width | 2 units (36 mm) |
| Programming | ETS (KNX Engineering Tool Software) |
| Compliance | DIN EN 60947-4-1, DIN EN 60669-1 |
- Office & Commercial Buildings — Centralized KNX control of lighting circuits, with real-time current monitoring to detect lamp failures or load faults automatically
- Hotels & Hospitality — Guest room lighting and appliance control with occupancy-based switching and energy monitoring
- Retail & Showrooms — Scheduled lighting control for display areas with load current feedback for maintenance alerts
- Industrial Facilities — Switching of HVAC fans, pumps, or ventilation motors with current detection for equipment fault diagnostics
- Smart Homes — Integration into KNX home automation for scene control, energy tracking, and remote switching of high-current loads
- Educational & Public Buildings — Energy efficiency programs leveraging real-time load data to optimize consumption
- 1 * ABB SA/S2.16.6.1 KNX 2-Fold Switch Actuator
- Bus connection terminal (pre-installed)
- Combo-head screw terminals for load connections
Unlike basic relay modules, the SA/S2.16.6.1 integrates active current monitoring directly into the switching unit — eliminating the need for separate current transducers. This enables fault detection, energy logging, and load monitoring all within a compact 2-module DIN rail footprint, fully programmable through standard KNX ETS software.
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