Glossary term
TP1
mediaBasics
Also known as
Twisted Pair 1TP
Definition
Main physical layer of KNX: twisted-pair bus at 30 V DC SELV, 9600 bit/s. The most widely deployed in residential and commercial installations.
Questions using this term
- On how many bits is the Group Address encoded inside a KNX TP1 telegram?2. TP Topology · Kodierung der Gruppenadresse
- The Group Address space in KNX TP1 allows up to 65 536 different Group Addresses (2^16).2. TP Topology · Adressraum Gruppenadressen
- 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
- The DALI bus uses a polarity-free twisted pair (no + / - orientation), with Manchester coding at 1 200 baud over a nominal 22.5 V DC supply, and is allowed to share the same multi-core cable as the 230 V mains feeding the luminaires.1. Architecture · Physikalische Schicht
- 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
Practice now
See how exam-ready you really are
10 real certification questions, no account needed. Find your gaps in under 5 minutes — free.