Digital/analogue I/O module Hager TXA304 — Digital input, 4 channels, 21–32 V DC, up to 230 V, 50–60 Hz

Hager TXA304 is a compact digital/analogue I/O module that provides four independent digital input channels for building automation and control systems. Designed for integration into KNX and modular installations, the unit accepts DC input voltages in the range 21–32 V and is rated to tolerate higher input conditions up to 230 V with a mains frequency of 50–60 Hz. The housing dimensions (71 × 69 × 90 mm) and modular form factor allow straightforward mounting within distribution boards or control cabinets where reliable signal acquisition and interface functionality are required.

Advantages

The module combines four binary input channels in a single compact device, which reduces wiring complexity and saves DIN-rail space. It supports both low-voltage DC signalling and higher-voltage tolerance for compatibility with a range of sensors and switch contacts. Robust electrical characteristics and a modular design facilitate stable operation in KNX-based automation systems and other control environments.

Suitable for

• Integration into KNX home and building automation systems
• Signal acquisition from switches, contacts and dry-coupled sensors
• Distributed installations in distribution boards and control cabinets
• Retrofitting existing control systems requiring additional digital inputs

Key specifications

• Function: Digital (binary) input, 4 channels
• Rated DC input voltage range: 21–32 V
• Maximum withstand input: up to 230 V (AC) at 50–60 Hz
• Form factor: Modular, DIN-rail compatible
• Dimensions: 71 × 69 × 90 mm

How to use

Mount the TXA304 on a DIN rail inside a distribution board or control cabinet and connect each input channel to the corresponding switch, contact or sensor according to the installation diagram supplied by the system integrator. Ensure the DC supply voltage for the inputs is within the 21–32 V range when using low-voltage devices. When interfacing with higher-voltage AC signals, verify wiring and protective measures are in place and that the installation complies with local electrical regulations. After wiring, integrate the module into the KNX or control system configuration and test each channel for correct signal detection.

Usage recommendations

Use appropriately rated wiring and overcurrent protection. Verify polarity and supply voltage before powering the module. For installations involving mains voltages up to 230 V, follow safety standards and employ a qualified electrician for wiring and commissioning.