The Interra ITR500-0003 is a 4-channel KNX dimmer / ballast actuator with a standard 0/1–10 V DC control interface for electronic dimmable ballasts (EVG) and similar gear. Each channel provides passive 1–10 V control (max. 100 mA per output) plus an embedded switching relay rated 16 A / 250 V AC (max. 10 A / 250 V for fluorescent loads). No additional supply voltage is required beyond the KNX bus.

Interra states embedded relay capacity examples of 23 ECG/18 W, 14 ECG/36 W, 11 ECG/58 W or 23 ECG-T5/24 W, with control voltage for up to 23 electronic control gears per channel. Application features include switching, relative/absolute dimming, status report, up to 15 scenes, staircase lighting, bus recovery/reset behaviour, preset values, manual switch/dimming, plus short-circuit and over-heat protection.

Key Features — 4 × 0/1–10 V + 16 A

• 4 channels: Analogue 0/1–10 V control with switched mains per channel.
• Passive 1–10 V: Max. 100 mA per output (Interra datasheet).
• 16 A relays: 16 A / 250 V AC general; fluorescent max. 10 A / 250 V.
• High ECG count: Up to 23 ECGs control voltage per channel (examples in datasheet).
• Scenes & staircase: Up to 15 scenes; relative/absolute dimming; presets.
• MDRC: 90 × 144 × 64 mm; < 12 mA / < 360 mW from bus; IP20; KNX certified.

At a Glance

Specification	Detail
Order code	ITR500-0003
Channels	4 × 0/1–10 V + switch
Output voltage	1–10 V DC (passive), max. 100 mA / output
Switch rating	16 A / 250 V AC (fluorescent max. 10 A)
KNX current / power	< 12 mA · < 360 mW
Dimensions (H × W × D)	90 × 144 × 64 mm
Configuration	ETS (S-Mode)
Protection / certification	IP20 · KNX Certified

Applications and Related Products

• 0/1–10 V lighting lines: Compact four-fold ballast control when six channels are not required.
• 6-channel sister: ITR500-0001 for six channels at 10 A.
• DALI projects: Prefer ITR832 gateways when the luminaire standard is DALI-2.
• Bus power: Allow for < 12 mA (e.g. ITR900 640 mA).

Choosing and Commissioning

Choose ITR500-0003 for four analogue ballast channels with 16 A switching. Connect loads and AC via screw terminals; KNX via bus terminal only — no extra device PSU. Observe fluorescent current limits and channel LED status. Program with ETS. Ratings and layout are in the Datasheet under Downloads (no separate product manual is listed on the Interra page for this SKU).