Description
The HDL 24-Zone KNX Dry-Contact Input Module (manufacturer model S24.1) is a professional automation module.
Function and technical details
24 independent potential-free input channels for KNX/EIB functions such as scenes, switching, shutters and controls. Supplier full model code M/S24.1 (the imported SKU omits M/). KNX bus 21–30 V DC, approx. 90 × 72 × 64 mm, 35 mm DIN-rail. Commissioning requires ETS.
Installation and commercial status
- Check power supply, signal protocol, load ratings, wiring, enclosures, fuse/breaker requirements and installation permissions with a qualified integrator.
- This is not a stand-alone Wi-Fi, Zigbee or Matter device; do not mix the HDL Buspro and KNX protocols.
- Stock, supplier discount, freight, tax/import treatment and final landed cost to Spain are not yet confirmed.
- This published listing is for enquiries only and unavailable for direct checkout.
Product photo obtained from HDL Automation’s official model page. Supplier price reference: October 2026 HDL KNX REV4 price list.
Gallery: two model-matched HDL M/S24.1 KNX reference photographs showing terminal positions and a side identification label. These are views of the same KNX device, not the similarly named HDL-MS24.232 Buspro module. Refer to the manufacturer wiring documentation before installation. Reference images: HDL distributor catalogue.



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