EAE SMP PS640 KNX Power Supply: 640mA with Auxiliary Output

The EAE SMP PS640 KNX Power Supply is a robust and essential system device designed to reliably deliver safe, stable voltage to your KNX installation. Providing 640mA of current, this power supply is suitable for medium to large KNX lines, reliably powering up to 64 standard KNX devices. The key distinguishing feature is its inclusion of an invaluable auxiliary voltage output, offering extra flexibility for peripheral components.

Engineered for professional installations, the EAE SMP PS640 KNX Power Supply is a DIN rail-mounted component that ensures the long-term, stable operation of the entire KNX bus, protected against short circuits and overloads.

1. Core Specifications and Dual Output Design

The PS640 provides two independent voltage outputs, maximizing its utility within the electrical distribution board.

Dual Output Functionality:

The device provides two separate 30VDCoutputs:

• Output 1 (KNX Bus Power): Supplies the KNX bus line with 30VDC and includes an integrated choke. The choke is essential as it decouples the bus line from the power supply while injecting the data telegrams, ensuring clear communication across the KNX bus.
• Output 2 (Auxiliary Voltage): A secondary output that provides an additional 30VDC (without a choke). This output is ideal for supplying auxiliary power to KNX components that require external voltage (e.g., specific  KNX Actuators or touch panels like the EAE Miola) or other non-bus devices. Important: This output cannot be used to power an additional KNX bus segment.

Key Technical Data:

2. Robust Protection and System Management

The EAE PS640 is built with features crucial for system safety, diagnostics, and easy maintenance.

System Diagnostics and Safety:

• LED Indicators: The device includes three separate LED indicators to provide instant diagnostic feedback:
  • Power (Green): Indicates correct input voltage and KNX voltage is present.
  • Overload (Red): Alerts the installer or technician to an overload or short-circuit condition on the bus.
  • Reset (Red): Illuminates when the reset sequence is in progress.
• Integrated Reset Button: A dedicated reset button allows the user or integrator to briefly interrupt the bus voltage (for 20 seconds), simplifying the commissioning and troubleshooting of KNX devices without disconnecting the power supply.
• Wide Input Voltage Range: The unit maintains stable performance across a broad input voltage range 150-275 V AC), ensuring reliable operation even in unstable power environments.

3. Ideal Application

The EAE SMP PS640 KNX Power Supply is the preferred choice for projects that benefit from centralized, reliable power and require an auxiliary voltage source without adding a second KNX power supply to the cabinet.

It is particularly well-suited for:

• Mid-to-Large Residential Units: Providing sufficient power for a fully equipped apartment’s actuators, sensors, and visualization devices.
• Commercial Zones: Powering individual zones or floors that incorporate numerous 30 V DC powered devices in addition to standard KNX components.