The ABB AA/S 4.1.2 Analogue Actuator (order code AA/S4.1.2) is a 4-fold MDRC device that converts KNX telegrams into analogue voltage (0…10 V) or current (0/4…20 mA) signals for HVAC and process control. An auxiliary mains supply (100…240 V AC) powers the output stage while KNX provides bus communication.

Each of the four channels A…D can be set independently as voltage or current output. Unused channels can be deactivated. Commission with ETS and the shared AA/XX.1.2 application; ABB i-bus® Tool supports diagnosis.

Key Features

• 4 independent analogue outputs: Mix voltage and current channels on one MDRC.
• Voltage ranges: 0…1 / 0…5 / 0…10 / 1…10 V DC.
• Current ranges: 0…20 mA and 4…20 mA DC.
• Auxiliary 100…240 V AC: Stable output drive for plant-room loads.
• 4 modular widths: Pro M DIN-rail form factor for distribution boards.
• Surface-mount sister: For 2-fold IP54 voltage-only, see AA/A2.1.2.

At a Glance

Specification	Detail
Product type	KNX analogue actuator, 4-fold, MDRC
Order code	AA/S4.1.2
Product ID	2CDG110202R0011
Outputs	4 channels (A…D), voltage or current
Voltage signals	0…1 / 0…5 / 0…10 / 1…10 V DC
Current signals	0…20 / 4…20 mA DC
Auxiliary supply	100…240 V AC, 50/60 Hz
KNX consumption	Max. 12 mA
Width	4 MW
Protection	IP20
Bus system	KNX TP

Technical data, installation instructions, ETS .knxprod, connection diagram, drawings, EPLAN, and declarations are under Downloads.

Applications

• HVAC plant rooms: 0–10 V valves/dampers and 4–20 mA transmitters from one actuator.
• Mixed signal projects: Voltage for EC fans and current for industrial actuators on adjacent channels.
• 1…10 V lighting: Analogue ballast control alongside KNX switching/dimming.
• Field IP54 needs: Use AA/A2.1.2 when surface mounting is required.

Installation Notes

Snap onto a 35 mm DIN rail (4 MW). Connect KNX bus terminal, auxiliary 100…240 V AC, and analogue outputs A…D (up to 4 mm²). Dielectric strength of outputs is 24 V AC / 34 V DC. Import the official .knxprod into ETS (Manufacturers → ABB → Output → Analog Output). Voltage load ≥ 1 kΩ; current load ≤ 500 Ω.