3.3. Wireless actuator
The wireless actuator (see Fig. 5) consists of a ZigBee TG-ETRX2
transceiver, a power supply circuit, and a valve. As the ZigBee
transceiver software allows the node to control the signal level on
the transceiver outputs that control the actuator, the only features
needed to carry out the above functions are the components to
bring the switch voltage to the required level. Applying a voltage
results in seating the valve, which prevents further gas leakage.
For the wireless actuator, a stationary power supply is used. The
power required by the actuator module depends mainly on the
power needed for the valve, which typically varies between 24 and
36 V and 1–2 A.