The ABB DSM/S 1.1 Diagnosis and Protection Module (order code 2CDG110060R0011) is an MDRC system component that helps monitor bus traffic / fault conditions and suppress transient interference on the KNX line. Place it in the topology according to ABB connection diagrams — typically near the line power supply (e.g. SV/S30.640.5.1) and couplers such as LK/S4.3.

DSM/S 1.1 has a published KNX certificate and technical data. Front LEDs indicate operating / traffic / fault-related states — use only the LED legend in the ABB installation instructions; do not invent diagnostic meanings. It complements supply diagnostics (SV/S ETS objects / i-bus Tool) with a line-side diagnosis and protection accessory.

Install as a 2 MW MDRC module on the 35 mm DIN rail. Follow polarity and connection order from the ABB diagram; incorrect placement can reduce the usefulness of both diagnosis and interference suppression.

Key Features — Line Diagnosis & Protection

• Diagnosis: Visual indication related to bus traffic and fault conditions (per ABB LED legend).
• Protection support: Helps suppress transient interference on the KNX line.
• Line placement: Install as shown in the ABB connection diagram relative to the power supply and couplers.
• Certified KNX device: KNX certificate published by ABB for this type.
• 2 MW MDRC: Compact DIN-rail module for distribution boards.

At a Glance

Specification	Detail
Product type	Diagnosis and Protection Module, MDRC
Order code	DSM/S1.1 (2CDG110060R0011)
Function	Bus diagnosis indication and transient-interference support
Width class	2 MW
Certification	KNX certificate published by ABB
Typical neighbours	SV/S bus supply, LK/S couplers
Indication	Front LEDs — meanings per ABB installation instructions

Technical data, connection diagram, CAD and declarations are under Downloads. Installation must be performed by a qualified electrician.