Glossary term
Line Repeater
topologieIntermediate
Also known as
Repeater
Definition
Component that amplifies and forwards telegrams in order to extend a line over multiple segments (up to 4 × 64 = 256 devices). Does not filter, unlike the Line Coupler.
Questions using this term
- Within a KNX area, the maximum number of Line Couplers is 15, one per subsidiary line.2. TP Topology · Bereichsbegrenzungen
- In an installation predating 2018, a maximum of 64 sensors, actuators, line couplers and backbone couplers can be connected to a TP main line.2. TP Topology · Offizielle Musterprüfung 4
- A Modbus RTU bus on RS-485 supports up to 32 nodes per segment (extendable with repeaters), requires 120 ohm termination resistors at both ends of the bus, and biasing resistors to define the idle state.3. Modbus RTU · RS-485 Multi-Drop
- A PROFIBUS RS-485 segment supports up to 32 nodes ("unit loads") without a repeater; beyond that, RS-485 repeaters must be added, and each repeater itself counts as a unit load.2. Physical layer · Unit Loads
- A Level 1 EnOcean repeater retransmits every received telegram (extending the range), while a Level 2 repeater also retransmits telegrams already forwarded by other repeaters (allowing wider cascading at the cost of higher loop risk).4. Repeater · Repeater Level 1
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