The ABB ABL/S 2.1 Application Unit Logic (order code ABL/S2.1) is a 2 MW MDRC graphical logic module for ABB i-bus® KNX. Build complex functions by combining logic elements and gates in an ETS plug-in — no extra software. The device is powered from the KNX bus only.

Capacity includes 50 logic elements (AND, OR, 1-of-N), 50 uni-/bidirectional gates, 30 timer modules, 10 comparators, 200 worksheets, 250 markers, and 254 inputs/outputs. For larger ETS-native logic with simulation, see ABA/S1.2.1; for calendars and macros see ABZ/S2.1.

Key Features

• Graphical ETS plug-in: Drag-and-drop logic without a separate engineering tool.
• 50 logic + 50 gates: AND/OR/1-of-N plus uni- and bidirectional gates.
• 30 timers: On/off delay, pulse duration, stairway lighting.
• 10 comparators: Analogue and threshold comparisons.
• 254 I/O: Large worksheet canvas (200 sheets, 250 markers).
• Bus-powered: No auxiliary supply — only KNX TP.

At a Glance

Specification	Detail
Product type	KNX Application Unit Logic, MDRC
Order code	ABL/S2.1
Product ID	2CDG110073R0011
Logic elements / gates	50 / 50
Timers / comparators	30 / 10
I/O / worksheets / markers	254 / 200 / 250
Supply	KNX bus only
Width / weight	2 MW / 0.1 kg
Dimensions	90 × 36 × 64.5 mm
Protection	IP20

Technical data, product manual, installation instructions, and CE declaration are under Downloads.

Applications

• Room and zone logic: Combine presence, window contacts, and setpoints without a PLC.
• Stairway and delay scenes: Built-in timer modules for lighting sequences.
• Value comparisons: Threshold gates for analogue sensors.
• Scale-up path: Move to ABA/S1.2.1 when you need thousands of gates and simulation.

Installation Notes

Snap onto a 35 mm DIN rail (2 MW). Connect only the KNX bus terminal — no auxiliary voltage. Assign the physical address with the programming button/LED. Parameterize with ETS3+ and the Logic Time application (ETS plug-in). Operating temperature −5 … +45 °C.