Description
HDL M/FMC3R.1 is a compact three-channel KNX relay actuator for flush wall-box installations. It provides switching outputs and additional inputs/indicator outputs for compatible conventional dry-contact wall switches.
Functions
- 3 × 10 A relay output channels (resistive rating), 7 dry-contact input channels
- 7 LED indicator outputs, rated 12 mA each and requiring suitable series resistors
- Scene control, staircase timer, programmable switch-on/off delays and switching counters
- Programming and manual relay test controls
Electrical and physical specifications
- KNX bus: 21–30 V DC, 25 mA at 30 V DC
- Auxiliary supply: 20–30 V DC, approximately 53 mA at 24 V DC for relay operation
- Relay mains: 100–240 V AC
- Maximum load: 10 A resistive or 6 A capacitive per rated channel
- Dimensions: 50 × 50 × 22.8 mm
- Net weight: 57 g; PC enclosure, IP20
Installation
Check back-box depth, electrical protection and separate 24 V auxiliary power. This module is not designed as a DIN-rail actuator and must be commissioned by a qualified KNX installer using ETS.
HDL official M/FMC3R.1 specification
Ordering
Manufacturer image, supplier stock, freight and final sales price are not confirmed; published listing for enquiries only; direct purchase is disabled.
The added model-specific image shows the KNX M/FMC3R.1 recessed 3-channel 10A actuator with its relay connections and programming button. Reference: exact model photo. Check hardware revision and installation parameters before ordering.


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