Gira KNX power supply 640 mA choke module model 213000

Gira KNX power supply 640 mA choke module model 213000 is a DIN-rail mountable device designed to provide a stable 29 V DC supply for KNX bus systems while integrating an electro-magnetic choke to reduce transient interference. The module delivers a rated current of 640 mA for KNX devices and maintains bus voltage stability under typical residential and commercial loads. Built to fit professional KNX installations, the unit supports reliable communication by dampening switching spikes and limiting inrush currents that can affect sensor and actuator operation.

Advantages

The integrated choke combined with a regulated output ensures smooth current delivery and improved immunity to voltage transients on the KNX bus. Compact DIN-rail format saves distribution space and simplifies installation within electrical panels. The device provides a constant rated current suitable for medium-sized KNX installations and helps reduce interference between loads and the KNX line, contributing to long-term stable operation of connected components.

Suitable for

• Residential KNX systems with multiple sensors, switches and actuators
• Commercial electrical panels in offices, retail or hospitality requiring a dedicated KNX supply
• Retrofit or new-build projects where interference suppression on the KNX bus is needed
• Installations with moderate device counts that require a 640 mA power source

Key specifications

• Rated output current: 640 mA for KNX bus supply
• Output voltage: regulated bus voltage suitable for KNX devices (approx. 29 V DC)
• Integrated choke for transient suppression and damping of switching spikes
• DIN-rail mounting for electrical distribution cabinets
• Designed for continuous operation in residential and commercial environments

How to use

Mount the module on a standard DIN rail inside the distribution board and connect the KNX bus and supply lines according to KNX installation guidelines and local electrical codes. Verify correct polarity and secure wiring to the terminal points. After connection, apply mains supply and monitor bus voltage and device communication to confirm proper operation. Ensure the total current draw of connected KNX devices does not exceed the 640 mA rating; where necessary, distribute loads across multiple power supplies or segments.

Usage recommendations

Place the unit in a ventilated panel area away from excessive heat sources. For installations with higher device counts or long cable runs, evaluate voltage drop and consider additional power supplies or repeaters. Regularly inspect wiring connections and verify that transient suppression meets site-specific requirements to maintain KNX bus reliability.