How much power do I need to supply to 10 HSM 100s running in always on mode? We will say there is an average of 50ft of cable running to each device from a central location. I am currently running 4.5v @1.2amps. It is not working. (random motion signals, not sending data, erratic behavior, etc...) - Josh
Announcement
Collapse
No announcement yet.
10 HSM100s How much power?
Collapse
X
-
I believe a 50' run will give you some degree of voltage drop. You might have to compensate with a slightly higher voltage. After you drop the runs, check the voltage at the end to make sure it's enough.HS4Pro on a Raspberry Pi4
54 Z-Wave Nodes / 21 Zigbee Devices / 108 Events / 767 Devices
Plugins: Z-Wave / Zigbee Plus / EasyTrigger / AK Weather / OMNI
HSTouch Clients: 1 Android
-
Each one looks like they draw less than 50mAmps from my measurements. A 500mA supply should just be enough to power 10. But that depends on the length/resistance of the wire and the voltage drop. You also might be getting noise coupled in from somewhere else like a fan or even the AC line.
You might be better off using a couple of small supplies closer to their destination than trying to use 1 supply for them all.
The tiny USB supplies for cell phones work fine for me (they are +5V at 500mA). Be sure the supply is regulated and not just a diode and a cap or the voltage might be too high.
I think I only have 3 running of 1 supply at most though but the wires are pretty long (50ft maybe). I used the old wires from the wired security system to power the HSM100s.
Comment
-
I actually ordered my first HSM-100 today from HS I plan on hard-wiring mine as well from my wiring closet, so my run will be probably 25' or so. I have the luxury of a variable-output power supply so I can accomodate the voltage drop.HS4Pro on a Raspberry Pi4
54 Z-Wave Nodes / 21 Zigbee Devices / 108 Events / 767 Devices
Plugins: Z-Wave / Zigbee Plus / EasyTrigger / AK Weather / OMNI
HSTouch Clients: 1 Android
Comment
-
I wasn't aware that noise could affect power distribution. I figured a watt was a watt. (AC and DC of course) So is it possible that I am getting unclean power to the units? I thought noise related to data transmission. The data is transmitted via z-wave. The power right now is originating out of a Rack mounted UPS - then to the power supply. I am sure there are AC lines running across the Alarm lines at some point. I am going to look into Wadenut's suggestion. That may become a standard practice for my company in the future. Perhaps Homeseer should consider adding an electrolytic capacitor to their units. Also, I am getting the full 4.5 volts at the end of each run.
Comment
-
Originally posted by Koviak View PostI wasn't aware that noise could affect power distribution. I figured a watt was a watt. (AC and DC of course) So is it possible that I am getting unclean power to the units? I thought noise related to data transmission. The data is transmitted via z-wave. The power right now is originating out of a Rack mounted UPS - then to the power supply. I am sure there are AC lines running across the Alarm lines at some point. I am going to look into Wadenut's suggestion. That may become a standard practice for my company in the future. Perhaps Homeseer should consider adding an electrolytic capacitor to their units. Also, I am getting the full 4.5 volts at the end of each run.
Actually, any length of wire can act either as an antenna (picking up noise) or as a transmitter (creating it), or both. Noise would be defined as any unwanted waveform on a conductor.
If you have access to an oscilloscope you can see exactly what's there.Real courage is not securing your Wi-Fi network.
Comment
-
This one from Radio Shack would be just the ticket.
http://www.radioshack.com/product/in...ductId=2103625
Just connect it across your power supply at each unit. Ideally across the original battery terminals. Turn off the power supply first or you may see a small spark, which is harmless.
Caution: These are polarized, which in effect means, if you connect it backwards you're liable to destroy it. The negative terminal is always labelled with the ( - ) minus sign.
The 50V in this case is the component maximum DC voltage rating.Real courage is not securing your Wi-Fi network.
Comment
-
Originally posted by Koviak View PostWhat would be the result of just leaving batteries installed while it is hard wired?- JoshReal courage is not securing your Wi-Fi network.
Comment
Comment