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External Power for RFXCOM equipment
Posted: Sun Nov 28, 2010 11:41 am
by Willem4ever
I'm consolidating my powersupplies and would like to know the (maximum) voltage I can apply to the various RFXcom products. I believe the adapters are 9 volt but I guess there is a voltage regulator inside and 12 volt should be doable ? Please advise (before I destroy them all
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Re: External Power for RFXCOM equipment
Posted: Sun Nov 28, 2010 1:42 pm
by b_weijenberg
The RFXCOM USB interfaces are powered by the USB interface so no problem.
The RFXCOM LAN/WLAN need a 5Volt DC power and must be very clean because the receivers are directly powered by this 5V. If you connect a higher voltage you blow up the receiver and transmitter modules and also the inputs of the LAN/WLAN controller!!!!
The RFXMeter unit (in case of RFXPulse only) must be powered by a 9 volts AC power adapter.
Each RFXPwr is also powered by a 9 Volts AC adapter. The power adapter and the CT of a RFXPwr have to be connected to the same power line phase. Multiple RFXPwr's can be powered by the same power adapter if the CT's are connected to the same phase.
The RFSensor is normally battery powered but can be powered by 7 to 15 volts DC using an extarnal power source.
Re: External Power for RFXCOM equipment
Posted: Sun Nov 28, 2010 6:56 pm
by Willem4ever
Thanks for the clear explanation.
Re: External Power for RFXCOM equipment
Posted: Mon Nov 29, 2010 9:27 pm
by Willem4ever
The RFXCOM LAN/WLAN need a 5Volt DC power and must be very clean because the receivers are directly powered by this 5V. If you connect a higher voltage you blow up the receiver and transmitter modules and also the inputs of the LAN/WLAN controller!!!!
I found a switched power supply from TDK-Lamba (Conrad webshop) output voltage accurary 1%, Ripple and noise 50 mV, I guess that must be good enough ....