Area line coupler - 2142REG

Based on the specific part number 2142REG (often stylized as 2142 REG), this refers to a building automation component manufactured by Albrecht JUNG GmbH & Co. KG (commonly known as JUNG).

It is not an audio voltage regulator (such as a "Jung Super Regulator"), but rather a network component for smart home systems.

Product Identity: JUNG 2142 REG

Device Type: KNX Area / Line Coupler (Bereichs-/Linienkoppler).
System: KNX / EIB (standardized protocol for building control).
Mounting: DIN-rail (REG = Reiheneinbaugerät), occupying 2 modules (36mm width).

Functional Description

The 2142 REG is used to connect two separate KNX data lines together. It ensures data flows between them while maintaining galvanic isolation (electrical separation) to protect the bus lines from faults.

Depending on how you address and program it (via ETS software), it performs one of three functions:

Line Coupler: Connects a subordinate line (e.g., a room or floor) to a main line, optionally filtering telegrams to reduce traffic load.

Area Coupler: Connects a main line to a backbone (area) line.

Repeater (Amplifier): Extends a single line segment to allow for more devices or longer cable runs (bypassing the filter function).

Key Specifications

Power Supply: Powered directly from the KNX bus (approx. 21–32 V DC).

Security: Newer versions (often noted with specific indices like "1S R") support KNX Data Secure.

Indicators: Features LEDs (Run, HL, UL) to indicate power status and data traffic on the Higher-order Line (HL) and Subordinate Line (UL).