The ABB AE/A 2.1 Analogue Input (order code AE/A2.1) measures two independent analogue signals and publishes them on KNX. The IP54 surface-mounted housing suits plant rooms and field locations where an MDRC rail is impractical.

Each channel can be parameterized for voltage, current, resistance, PT100/PT1000 (2-wire), KTY sensors, or floating contacts. The device is bus-powered; active sensors need their own external supply.

Key Features

• 2 independent inputs: Voltage, current, Ω, PT100/PT1000 (2-wire), KTY, and contacts.
• Typical ranges: 0…1 / 0…5 / 0…10 V · 0…20 / 4…20 mA · 0…1000 Ω.
• Bus-powered: No auxiliary mains — KNX TP only.
• IP54 surface housing: Field mounting beside sensors and plant equipment.
• ETS application: Official .knxprod under Downloads.
• MDRC sister: Four channels + sensor supply on DIN rail — AE/S4.1.1.3.

At a Glance

Specification	Detail
Product type	KNX analogue input, 2-fold, surface-mounted
Order code	AE/A2.1
Product ID	2CDG110086R0011
Inputs	2 independent channels
Signal types	V · I · Ω · PT100/PT1000 (2-wire) · KTY · contacts
Supply	KNX bus only
Sensor supply	Not integrated (external for active sensors)
Protection	IP54
Bus system	KNX TP

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

Applications

• Temperature sensing: PT100/PT1000 or KTY near ducts, tanks, or outdoor plant.
• Process transmitters: 0/4…20 mA and 0…10 V from HVAC sensors.
• Contact monitoring: Floating contacts as binary/analogue channel modes.
• Panel alternative: Prefer AE/S4.1.1.3 for four channels with integrated 24 V sensor supply. Pair outputs with AA/A2.1.2.

Installation Notes

Surface-mount the IP54 housing, connect KNX via the pluggable terminal, and wire sensor inputs per the connection diagram. Assign the physical address with the programming button/LED. Import the official .knxprod from Downloads into ETS.