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venfree/KNX Devices/Functions/KNX Binary Input & Push Button Interface

KNX Binary Input & Push Button Interface

KNX binary inputs and push button interfaces compared: Theben TA 4, BMI 4, Gira. Price per input.

A KNX binary input (push button interface) connects volt-free contacts like buttons, switches, or window contacts to the KNX bus. Each input sends a telegram to the bus when activated.

TA 4
Theben		492 €Details
Universal-Tasterschnittstelle 4fach KNX
Gira		4101 €Details
theLuxa P300 KNX
Theben		1259 €Details

Prices are net list prices (excl. VAT). Actual street prices may vary.

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KNX Switch Actuator
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KNX Wiki: Basics

KNX Communication Object (CO)
A communication object (CO) is a data point on a KNX device. It has a type (DPT), a direction (send/receive), and is linked to COs on other devices via group addresses.
Read article →
KNX Flags – C, R, W, T, U, I
KNX flags control the behaviour of a communication object on the bus. They define whether a CO can send, receive or respond to telegrams, and whether it requests a value on startup.
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KNX Group Address
A KNX group address (GA) is a logical address that links communication objects (COs) of different devices. Whatever is written to a GA is received by all other COs bound to that GA, the publish-subscribe principle of KNX.
Read article →
KNX Telegram
A KNX telegram is the smallest unit of communication on the bus. It contains sender (physical address), destination address (group address), data value and priority, and is received simultaneously by all devices on the line.
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Frequently Asked Questions

KNX Binary Input & Push Button Interface: What is it?

A KNX binary input (push button interface) connects volt-free contacts like buttons, switches, or window contacts to the KNX bus. Each input sends a telegram to the bus when activated.

KNX Binary Input & Push Button Interface: What does it cost?

In the venfree catalog from 23 € per channel (net list price, excl. VAT). The total depends on the number of channels and the manufacturer.

KNX Binary Input & Push Button Interface: Which manufacturers are available?

In the venfree catalog: Theben, Gira, among others.

KNX Binary Input & Push Button Interface: How many do I need?

It depends on the number of channels. venfree automatically calculates the requirement from your rooms and functions, free and without an account.

Need a KNX Binary Input & Push Button Interface?

venfree automatically calculates how many channels and devices you need, based on your rooms and functions. Free, no account required.

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