The Interra ITR524-0016 is the highest-density 24-channel KNX Combo+ switch actuator in the ITR5XX-0016 family, with 16 A @ 250 V AC per output in a 15-module enclosure (246 × 90 × 64 mm). It targets large hospitality GRMS panels and commercial switchboards that must minimise module count.

Each output supports ETS configuration for lighting, heating, shutter/blind (paired outputs), 24 V shutter groups, and fan-coil blocks within the six-output block structure (C1–C6 through C19–C24). The device is KNX bus-powered (max 20 mA), includes manual override, scenes, logic, timers, feedback options, and last-state memory.

Key Features — 24 × 16 A Combo+

• 24 × 16 A with 120/165 A inrush per channel.
• Four six-output blocks for structured HVAC and shading logic.
• 8 converter objects, 4 logic gates (ITR524 row — same as ITR516/520).
• 245 group addresses and assignments (datasheet).

At a Glance

Specification	Detail
Order code	ITR524-0016
Outputs	24 × 16 A
Dimensions (W × H × D)	246 × 90 × 64 mm
DIN modules	15
Configuration	ETS (S-mode)

Applications and KNX Integration

• Large risers: Maximum switched/HVAC capacity in one 246 mm module.
• 20 channels sufficient: ITR520-0016 in the same enclosure size.
• Mid-size panels: ITR516-0016 (16 ch) or ITR512-0016 (12 ch) in 171 mm width.
• System power: ITR900 640 mA PSU on extended lines.

Choosing Interra Combo Actuators

ITR524-0016 is the top of the ITR5XX-0016 line (24 outputs). Interra’s website also lists ITR525-0024 as the current marketing SKU for the 24-channel Combo+ — functionally the same platform per KNX certificate (4–24 channel). For four or eight channels in half the width, see ITR504-0016 and ITR508-0008.