NETIO PowerBOX 4Kx is a LAN-enabled smart power strip with 4 outputs. Each output socket can be switched on or off individually over the web interface. Integration with third-party systems using various protocols (JSON, Modbus/TCP, SNMP, MQTT-flex, Telnet, ...) is easy thanks to the Open API. Electrical parameters (A, W, kWh, TPF) are measured with high accuracy at each output. With the secure NETIO Cloud service, the outputs can be controlled from anywhere.

NETIO PowerBOX 4Kx can be configured with a web browser (output control, measurements, timer settings, …). Individual outputs can be also controlled using the NETIO Cloud service, the mobile app or the Open API (http JSON/XML, SNMP, Modbus/TCP, Telnet, MQTT and more).

PowerBOX 4Kx is a smart LAN power socket in the form of a power extension cable. A RJ45 Ethernet cable is used to connect to the LAN.

PowerBOX 4Kx is a common product name for different versions of electrical sockets - models 4KF (Type F - Most of EU - Schuko), 4KE (Type E - France) and 4KG (Type G - United Kingdom)


Electrical parameters (A, W, kWh, TPF, V, Hz) are measured with high accuracy at each output.

Each output can be switched on and off according to the current time and day of week. The time schedule can be different for each output.


Professional product

PowerBOX 4Kx can be used for light industrial applications. The product works in a wide temperature range, supports firmware upgrades over the web, remembers the last socket states before being powered off, allows defining a power-up delay for the outputs, and its relays switch at zero current (ZCS).


Typical applications

  1. Each electrical socket can be separately switched on or off from the product’s web interface.
  2. In addition to the other methods of control, each output can be controlled remotely with NETIO Cloud. For each output, NETIO Cloud displays the current consumption in kWh.
  3. The outputs can be metered and controlled with the Open API (JSON, Modbus/TCP, SNMP, MQTT-flex, Telnet, , ..)
  4. The NETIO power sockets device can work with various third-party programs and applications (Integration partners & NETIO Drivers).
  5. The power sockets can be controlled using the NETIO Mobile 2 as long as the app is connected to the same network, or with NETIO Cloud.
  6. Measurements of electrical parameters can be monitored in the web interface or with the Open APII.




Ask for a price or technical parameters

Documents to download

Flyer PDF
Manual PDF (CE)



Open API: Supported M2M protocols

One Open API protocol can be used at a time, chosen from among the supported M2M protocols:

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

Regardless of the Open API used, the PowerBOX 4Kx can be always controlled from its web interface and from the NETIO Cloud service.


Customers can use the following ways to communicate with the device:

  1. WEB
  2. NETIO Cloud
  3. One chosen Open API protocol
  4. Mobile app over the LAN (via NETIO Cloud).


Useful links:



  • IT infrastructure: Remote restart of devices in a 19” cabinet in a data center
  • AV equipment: Multimedia equipment switched on/off from a central system or a multimedia control panel.
  • Diagnostics of connected appliances by measuring their energy consumption (3D printer, lab equipment, …)
  • Lighting: Controlling additional lighting from a central system
  • Conferencing rooms: Powering off unused equipment
  • Digital signage or AV (Audio Video): NETIO supports drivers for most systems – NETIO Drivers

>> NETIO Usage examples


PowerBOX 4Kx / 4KF / 4KE / 4KG

Smart LAN controlled power strip 230V

4Kx is an overall designation for products with 3 different electrical socket types.

  • PowerBOX 4KF
    DE (Type F – Schuko) socket is used in most of the continental Europe and can be used in Russia (230V / 16A).
  • PowerBOX 4KE
    FR (Type E) socket with an earth pin is needed in France, Belgium, Czech Republic, Slovakia and Poland (230V / 16A).
  • PowerBOX 4KG
    UK (Type G) socket and plug for the United Kingdom, Ireland and other countries (230V / 13A).



Electrical measurements

NETIO PowerPDU 4C is small PDU with power measurement and IEC-320 outputs

NETIO PowerBOX 4Kx measures electrical parameters separately for each output. Measured values are displayed in the web administration interface and at the same time are accessible via Open API protocols. NETIO PowerBOX 4Kx measures with an accuracy better than 1%.

  • 4x Current [A]
  • 4x Output power [W]
  • 4x Energy [Wh]
  • 4x TPF (True Power Factor)
  • 4x Phase [°]
  • 4x Reverse Energy [Wh]
  • Voltage [V]
  • Grid frequency [Hz]

>> More about electrical measurements


Industrial product quality

NETIO sockets are made with quality in mind. Each unit includes a set of supporting functions to ensure reliability and long service life of the product in real-life conditions.


ZCS (Zero Current Switching)

An important feature of NETIO PowerPDU 4C is ZCS (Zero Current Switching).

An important feature of NETIO PowerBOX 4Kx is ZCS (Zero Current Switching). ZCS controls the exact time when the mechanical relay contacts close and open. The relay contacts switch the output on or off when the current crosses the zero level. 

  • In the long run, ZCS support reduces the product failure rate due to internal relay damage.
  • Since the relay switches when the current waveform crosses the zero level, negative effects of inrush current are significantly reduced.
  • The ZCS and PowerUp delay functions reduce the chance of circuit breakers tripping when power is restored after an outage.
  • ZCS extends the lifetime of connected equipment; especially in case of frequent on/off switching of devices that are not designed for that (such as switching power supplies).

>> Glossary: More about ZCS


PowerUp state

For some applications, it is important to set the power socket state immediately after the device is powered on (or the power is restored after a failure). With some machines it is important to avoid momentary switch-on or switch-off. This parameter therefore defines the behavior of the 110/230V output power socket before the standard communication with a master system starts to work.

  • On
  • Off
  • LAST state restores the last state before the power was disconnected


PowerUp sequence (delay)

The PowerUp sequence function (delay) ensures that the 230V power output is switched on with a configurable delay (several seconds) after the power is restored. This can avoid circuit breaker tripping when power is restored after an outage.

The idea is to switch the outputs on one by one with a delay of a few seconds in between in order to avoid tripping the circuit breakers (see Inrush Current). We particularly recommend this function if there are two UPS or several LED lights in parallel in the same circuit.


>> Glossary: PowerUp state


Scheduler (timed switching of individual outlets)

With the Scheduler (timer) function, each output can be individually switched on or off at specified times and days of week. The switching times are easily configured in a graphical interface.
  • Each output can have its own schedule
  • When a schedule is active, outputs can still be controlled with NETIO Cloud, the web interface and Open API
  • Scheduler functionality can be enabled/disabled (not edited) for each output from the NETIO Mobile 2 app.
  • Scheduler does not need an internet connection. However, a time source is needed – provided over the internet or, for example, by a local ADSL / WiFi router.
  • For special usage the Scheduler can be combined with PAB (Power Analyze Blocks):
    • Switching time is based on current sunrise/sunset based on your location
    • Whatever happend, defined output can be switched off on defined time (midnight for example).
    • Ask for more..

 >> More information about the Scheduler



The PowerBOX 4Kx smart power strip can be connected to NETIO Cloud. Control a hundred outputs from a single web screen! NETIO Cloud is an ideal solution for remote control and restarting. The NETIO Cloud service is provided for a fee and supports NETIO products.

  • All devices produced by the NETIO products company can be connected to NETIO Cloud.
  • Thanks to the included “Welcome credit”, the service can be used at no cost for the first 3 years.
  • Devices connected to the service can be controlled securely from anywhere over the Web (HTTPs).
  • NETIO Cloud can be used in parallel with another Open API protocol.
  • Communication with the Cloud service is secured (port 8883 - MQTTs - TLS).
  • NETIO Cloud uses a separate Open API (MQTTS protocol) to control all devices linked to a given user account). 

>> More about NETIO Cloud service 


WatchDog Ping + Power

PowerPDU 4Kx is equipped with WatchDog PING (IP WatchDog) and WatchDog Power consumption (PAB).

  • WatchDog Ping continuously monitors whether a given process or a part of a system work as they should. If not, the WatchDog restarts the process. Can be used for all 4 outputs.
  • WatchDog Power is "Condition" & "Action" (PAB - Power Analysis Block & Rules) based autonomous system. It continuously monitors current (energy) of monitored device powered from any metered power output of NETIO PDU device. Can be used for all 4 outputs.

>> Glossary: WatchDog PING (IP WatchDog)

>> Glossary: WatchDog - Power consumption (PAB)


Mobile app

Mobile app controlled power sockets
This device can controlled from mobile App NETIO Mobile 2 (Android & iOS).
  • LAN: NETIO Mobile 2 can control all outputs of devices within local LAN (WiFi).
  • Cloud: User account on the NETIO Cloud service can be connected to the mobile app.
You can do with mobile app
  • Control individual power outputs – switch ON, switch OFF, RESET
  • Read power consumption data (A, W, Wh), if this one output (device) supports energy metering

  • QR code for NETIO Mobile 2 AndroidQR code for NETIO Mobile 2 iOSActivate / deactivate the week Scheduler function per each output
  • Sorting of outputs within groups (by function or location)
  • Output grouping – default group per one device can be changed individualy
  • Group control - Switch the whole group of outputs On / Off
  • Group control - Activate / deactivate the week Scheduler function for each output in whole group
  • Change output / device name (visible in the mobile application only)
  • Add multiple devices to the mobile app.
  • LAN discover: Search your LAN/Wifi network for NETIO devices.


>> NETIO Mobile 2

General properties

LAN WiFi IQRF Web NETIO Cloud WatchDog Scheduler Mobile App Open API Max. current
per socket
PowerBOX 4KF 4 x DE
(Type F)
ZCS 4 1 - - Yes Yes Ping + Power Yes Android + iOS 10 protocols 230V / 16A
PowerBOX 4KE 4 x FR
​(Type E)
ZCS 4 1 - - Yes Yes Ping + Power Yes Android + iOS 10 protocols 230V / 16A
PowerBOX 4KG 4 x UK
​(Type G)
ZCS 4 1 - - Yes Yes Ping + Power Yes Android + iOS 10 protocols 230V / 13A
PowerBOX 3PF 3 x DE
(Type F)
ZVS - 1 - - Yes Yes Ping Yes Android + iOS 10 protocols 230V / 16A
PowerBOX 3PE 3 x FR
​(Type E)
ZVS - 1 - - Yes Yes Ping Yes Android + iOS 10 protocols 230V / 16A
PowerBOX 3PG 3 x UK
​(Type G)
ZVS - 1 - - Yes Yes Ping Yes Android + iOS 10 protocols 230V / 13A
PowerCable REST 101x 1
(5 types)
ZCS 1 - Yes - Yes Yes Ping + Power Yes Android + iOS 10 protocols 230V / 10-16A


Technical specifications


  • Lua support: No
  • Scheduler function: Yes
  • IP WatchDog function: Yes
  • Power WatchDog function: Yes
  • Sending emails: No
  • Event log: Yes (web)


  • Electrical measurements
    • 4x Current [A]
    • 4x Consumption [Wh]
    • 4x Output power [W]
    • 4x TPF (True Power Factor)
    • 4x Phase [°]
    • 4x Reverse Energy [Wh]
    • Frequency [Hz]
    • Voltage [V]
    • Accuracy: better than 1% (25°C)


  • Power input: The “x” in the “4Kx” model number specifies the plug type
  • Power output: The “x” in the “4Kx” model number specifies the socket type (4 sockets)
  • Number of controlled outputs: 4
  • Electrical measurements: Yes
  • Number of metered outputs: 4
  • 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)
  • Internal consumption: Max 1-2 W


  • SPD - Surge protection: Yes, type 3
  • Switching element: relay SPST-NO, ZCS
  • ZCS (Zero Current Switching): Yes
  • IOC (output state independent from FW upgrades): Yes
  • PowerUp state of outputs: On / Off / LAST state
  • PowerUp delay: Yes


  • Mechanical: Aluminium profile
    • PowerBOX 4KE, 4KF: 320 x 66 x 63 mm + cable 1,6 m
    • PowerBOX 4KG: 368 x 66 x 63 mm + cable 1,6 m


  • Protection: IP30
  • Sound output: No
  • Temperature range: -20°C to +65°C / 10A
  • Designed and manufactured: European Union (Czech Republic , Prague)



Expand all

Is it possible to specify in which state the output (a particular power socket) will be after power-up?

Yes. When the PowerBOX is powered up, all outputs are set according to the configured PowerUp state (On / Off / LAST value). The parameter can be set in the web interface in the detailed configuration for each output.

I forgot the password, how can I reset the product to factory defaults?

To reset the product to factory defaults, press and hold the button next to the RJ45 jack. Keep the button pressed and plug in the product. Still keep the button pressed. About 12 seconds after powering up, the yellow LED flashes 3 times and factory default settings are restored (Load to defaults).


For the current procedure, see the supplied QIG (Quick Installation Guide) for the product.
It is available for download at this page as well as included in the product package.


The NETIO Mobile app cannot find the NETIO PowerBOX 3Px.

For Android mobile devices, please upgrade to NETIO Mobile 2. For iOS mobile devices, a NETIO mobile app is not available yet. 


Can PowerBOX restart a device remotely?

Yes, the “Short OFF” command (accessible for instance in PowerBOX web interface) can switch the power to the device off for e.g. 5 seconds and then switch it on again automatically.


Typical applications include the remote restart function, where the user needs to send, over the Web or via the URL API, a command that momentarily switches the output off and then switches it back on. This is typically used to restart a LTE / WLAN modem; the PowerBOX controls the power to the modem. 

Can PowerBOX switch on an output at a specified time?

Yes, PowerBOX 4Kx supports the Scheduler function at each output.
More complex timing patterns can be also implemented in a master system.



Is it possible to control PowerBOX using an IoT cloud?

Yes. NETIO PowerBOX 4Kx includes an open API. We are continuously publishing ANxx (Application Notes) that describe how to connect the product to various third-party systems.

PowerBOX 4Kx also supports NETIO Cloud.




Manual CS
Manual DE
Quick Installation Guide: 
Guide CS
Guide DE

Photo and video

Product comparison

  Connection Switched
Inputs NFC Web


Mobile App HTTPs Open APIs
2xLAN 4xC13 4 ZCS RS-232 - Yes Yes Lua scripts Ping Yes iOS

15 protocols

LAN 4xC13 - ZVS - - Yes Yes Condition
& Rules
Ping Yes iOS 
- 10 protocols
LAN 4xC13 4 ZCS 1xDI (S0) - Yes Yes Condition
​& Rules
Ping + Power Yes iOS 
- 10 protocols
PowerPDU 8QS LAN 8xC13 1+1 ZVS 1xDI (S0) - Yes Yes Condition
​& Rules
Ping + Power Yes iOS 
- 10 protocols
2+2 2 ZCS / - 2xDI
- Yes Yes Condition
​& Rules
Ping + Power Yes iOS 
- 10 protocols
PowerBOX 3Px LAN 3x - ZVS - - Yes Yes Condition
​& Rules
Ping Yes iOS 
- 10 protocols
PowerBOX 4Kx LAN 4x 4 ZCS - - Yes Yes Condition
​& Rules
Ping + Power Yes iOS 
- 10 protocols
PowerCable REST WiFi 1x 1 ZCS - Yes Yes Yes Condition
​& Rules
Ping + Power Yes iOS 
- 10 protocols
PowerCable 2PZ LAN
2x - ZVS - - Yes Yes Condition
​& Rules
Ping Yes iOS 
- 10 protocols
PowerCable 2KZ LAN
2x 2 ZCS 2xDI
- Yes Yes Condition
​& Rules
Ping + Power Yes iOS 
- 10 protocols
Product overview 2023



Available models

NETIO PowerBOX 4KF LAN controlled power strip 230V Type F Schuko plug type (DE)
PowerBOX 4KF
LAN electrical sockets – 4 outputs, 230V / 16A – Type F – DE Schuko is used in most European countries.
NETIO PowerBOX 4KE (FR plug) LAN controlled power socket with Open API (MQTT, HTTP JSON, Modbus, ...)
PowerBOX 4KE
LAN electrical sockets – 4 outputs, 230V / 16A – Type E – FR is used in France, Belgium, Czech Republic, Slovakia, Poland
NETIO PowerBOX 4KG (UK plugs) remote controlled power strip via Open API and web inteface
PowerBOX 4KG
LAN electrical sockets – 4 outputs, 230V / 13A – Type G – UK is used in the United Kingdom, Ireland, ...
Optional accessory NETIO MK1 PowerBOX

Metal bracket for 1 piece NETIO PowerBOX 3Px on the wall contains two pieces of metal.


Lan ports: 
LAN ethernet switch: 
WiFi AP mode: 
Blue Tooth 4.0 LE: 
Serial port (RS-232): 
SMS Alerts: 
Email alerts: 
Mobile App: 
Scheduler (Chytrý kalendář): 
IP Watchdog Hearbeat): 
Warranty 2: 
6 Months
Protection 2: 
Rack montage: 
Product dimensions: 
340 x 58 x 90 mm
Product weight: 
1,18 Kg
Shipping package: 
420 x 65 x 130 / 1350 g
SNMP v1: 
SNMP v3: 
User certificates: 
MS Azure (MQTT): 
Power Output: 
4x DE (Type F - Schuko)
Power Input: 
230V AC
Power Output sockets: 
Power Input: 
Europlug - cable 1m
Power In max current: 
Max one socket current: 
Power fuse: 
External, mechanical
Current meter: 
Metered values: 
Energy meter: 
XML interface accessible in LUA: 
SNMP interface accessible in LUA: 
Web buttons accessible in LUA: 
CGI interface accessible in LUA: 
PING interface accessible in LUA: 
RS-232 accessible in LUA: 
Online demo IP address:
NETIO PowerBOX 4Kx smart power strip 230V with power metering
Show download for mobile: 

Ask for a price or technical parameters

For device testing use name/password demo/demo