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PowerBOX 4Kx: Smart power strip with metering

Code: 8594185580867 8594185580850 8594185580874 Choose variant
€249 / pcs €249 / pcs €269 / pcs from €249 / pcs €301,29 incl. VAT €301,29 incl. VAT €325,49 incl. VAT from €301,29 incl. VAT
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NETIO PowerBOX 4Kx is a smart power strip with 4 outputs controlled over a LAN, capable of measuring electrical parameters. Using the web interface, each socket can be individually switched on or off and the electrical measurements can be monitored.

Open API enables integration into third-party systems using a wide range of protocols (JSON, Modbus/TCP, SNMP, MQTT, Telnet, ...).

NETIO PowerBOX 4Kx comes in several variants with different electrical socket types. For instance, PowerBOX 4KF features Type F - DE Schuko sockets used in most of Europe. UK and FR versions are also available.

PowerBOX 4Kx is a professional product. The output relays switch when the voltage is zero (ZVS), and the product operates in a wide temperature range of -20°C to +65°C. The PowerUp state of each output can be configured. Electrical parameters (V, A, W, Wh, TPF, Hz) are measured with a high accuracy.

With the NETIO Cloud service, the outputs can be controlled from anywhere. The NETIO Cloud service is provided for a fee but it uses SSL security and servers in Europe. The smart socket device can be also controlled using the NETIO Mobile2 app for Android.

Detailed information

Product detailed description

NETIO PowerBOX 4Kx is a power strip with 4 outputs (electrical sockets) controlled over a LAN. Each individual output can be switched on and off in the web interface.

Open API enables integration into third-party systems using a wide range of protocols (JSON, Modbus/TCP, SNMP, MQTT, Telnet, ...).

With the NETIO Cloud service, the outputs can be controlled from anywhere. The NETIO Cloud service is provided for a fee but it uses SSL security and servers in Europe.

  • LAN connection, WEB interface
  • Each output can be measured and controlled separately
  • 4x Electrical measurements (V, A, W, Wh, TPF, Hz)
  • OPEN API: MQTT-flex, Modbus/TCP, Telnet, JSON, XML, SNMP, ...
  • ZCS – Zero Current Switching for each output
  • Mobile app: NETIO Mobile2 (Android)
  • Cloud service: NETIO Cloud (with TLS security)


Typical applications of remotely controlled power sockets

  • Energy consumption metering with a time history for individual appliances
  • Restart over the Web
  • Energy savings
  • Switching power outputs on and off with a mobile app
  • Power output switching and measurements using NETIO Cloud
  • Controlling electrical sockets with a driver from multimedia applications (Crestron, Control4, Neets, ELAN, SAVANT, RTI)
  • Open API connection to open systems (Node-RED, Mikrotik, StreamPipes, HMS, ..)
  • Open API MQTT cloud connection to portal applications (DevicePilot, AWS, IBM Bluemix, MS Azure)


Open API

NETIO PowerBOX 4Kx smart socket devices support control and measurements over the Web. For Open API communication, M2M protocol can be chosen  from among the following:

  • SNMP v1 / v2
  • SNMP v3
  • MQTT-flex (plain / TLS)
  • Modbus/TCP
  • Telnet
  • URL API (http get)
  • JSON over HTTP
  • XML over HTTP
  • HTTP Push JSON
  • HTTP Push XML

The SNMP protocol can be always used in parallel to other APIs.

Documentation for the protocols is available at the manufacturer’s website. The ANxx Application Notes provide useful deployment guidance.


Professional product

The LAN-controlled PowerBOX 4Kx power socket device is designed for professional use.

  • Wide operating temperature range: -20 to +65 °C
  • Accurate electrical measurements, each unit is factory-calibrated.
  • PowerUp state – states of outputs after the device is powered up are configurable (On/Off/Last). A PowerUp delay can be configured for each output.
  • ZCS – for switching an appliance on and off more frequently than a few times a day, ZCS (Zero Current Switching) support becomes important in the long term. ZCS makes sure that the output relay switches when the immediate current is zero.
  • Easily mountable on a wall or a DIN rail.

ZCS reduces the stress on the appliances connected to the outputs and prolongs their lifetime. It is particularly suitable for electrical appliances with a high inrush current. A high inrush current is typical for switching power supplies common in IT as well as in LED lighting and other application areas. 


4Kx – Different electrical socket versions (“x”)




Voltage / current

PowerBOX 4KF


DE – Type F Schuko

230V / 16A

PowerBOX 4KE


FR – Type E

230V / 16A

PowerBOX 4KG

UK – Type G

UK – Type G

230V / 13A




  • LAN (RJ45): Yes
  • WiFi: No
  • Web: Built-in web server
  • Online demo: Yes
  • FW upgrade: Yes - web
  • Mobile app: NETIO Mobile2 (Android)
  • Cloud connection needed for installation: No
  • Control button for each output: No


  • Cloud service: NETIO Cloud (for a fee, SSL security)
  • M2M API protocols:
    • JSON over HTTP (default)
    • MQTT-flex (MQTT extension, supports SSL)
    • HTTP Push JSON
    • HTTP Push XML
    • SNMP v1
    • SNMP v3
    • Modbus/TCP
    • XML over HTTP
    • URL API (http get) (control of outputs only)
    • Telnet (control of outputs only, backwards compatible with KSHELL)


  • Lua support: No
  • Scheduler function (calendar): Yes
  • IP WatchDog function: No (but planned)
  • Sending e-mails: No


  • Power input: The “x” in the “4Kx” model number specifies the plug type
  • Mechanical power switch: No
  • Power output: The “x” in the “4Kx” model number specifies the socket type (4 sockets)
  • Available electrical socket versions:
    • Type F – DE schuko – PowerBOX 4KF (230V / 16A)
    • Type E – FR – PowerBOX 4KE (230V / 16A)
    • Type G – UK – PowerBOX 4KG (230V / 13A)
  • Number of controlled outputs: 4
  • Energy metering: Yes
  • Number of metered outputs: 4
  • Parameters measured for the whole device: Grid frequency [Hz], Voltage [V], Total current [A], Total energy [Wh], Total power input [W], Overall TruePF [-]), Overall phase shift [°], Reverse Energy [Wh]
  • Parameters measured for each output: Current [A] / Energy [kWh] / Power [W] / TruePF [-] / Phase shift [°] / Reverse Energy [Wh]


  • Accuracy of electrical measurements: better than 1% (25°C)
  • Internal consumption: Max 2 W
  • SPD – surge protection: Yes, type 3
  • Switching element: SPST-NO relay, ZCS
  • ZCS (Zero Current Switching): Yes
  • IOC (output state independent from FW updates): Yes
  • PowerUp state of outputs: On / Off / LAST state


  • Dimensions – 4KF + 4KE: Aluminium profile – 320 x 62 x 62 mm + cable 1.6 m
  • Dimensions – 4KG: Aluminium profile – 368 x 62 x 62 mm + cable 1.6 m


  • Protection: IP30
  • Sound output: No
  • Temperature range: -20°C to +65°C



More information about this product:

Additional parameters

Category: NETIO power sockets
Warranty: 2 years
? Protocols (M2M API): REST (XML, JSON, URL API), Modbus/TCP, Telnet, MQTT, SNMP
? Lua programmable: No
? Power measurement: With measurement
? Network: LAN (Ethernet)
? NETIO Cloud: Yes
? Power socket type: DE Schuko (Type F), FR (Type E), UK (Type G)

Applications of remote controlled power sockets

NETIO Cloud for remote restarting

NETIO products introduction