4WPS-PPU - A Personal Protection Unit

4WPS PPUA 4WPS Personal Protection Unit (PPU) is a small electronic device carried by staff around a worksite. The device uses a radio signal to provide continuous monitoring of the worker’s location to the site Master Control Unit. It can also receive alarms from the site Master Control Unit or a Secondary Control Unit.

The device uses a ZigBee Personal Area Network as its core technology to allow small, low-power digital radios based on an IEEE 802.15.4 standard to be configured for site use. The PPU device uses a mesh network structure to transmit data over longer distances, passing data through intermediate devices such as other PPUs, a MCU or SCU to reach more distant ones. This allows ad-hoc worksite protection networks to be formed, with no centralised control or high-power transmitter/receiver able to reach all of the devices by the one radio signal.

4WPS-PPU features:

  • Built around industry-standard ZigBee IEEE 802.15.4 for Personal Area Networking
  • Always-on monitoring of data
  • Monitoring of many parameters
  • Automatic alarm reporting
  • Use of a 4WPS server as the host processor

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