Where is it stated they take 5A?You have no chance to supply 21 devices at 24V and 5 amperes each
All 21 devices are installed in various locations in clean rooms! They probably don't wanna have any active electrical components in clean room!Would it be possible to run mains voltage to your location and then use a SMPS to get your 24 volt supply? That would make for much easier than running 24 VDC down a 1,000 foot run. There would also be a smaller I*R drop.
Ron
2.70 AmpWhere is it stated they take 5A?
The question is...Where is it stated they take 5A?
Two sets:The question is...
Are the "inputs" the only power required by the devices?
each65 watts each or 65 watts total?
So Is it 2.70 amp x 21 devices = 56.7 amp??Then you need a much bigger power supply.
I am not supplying input signal from my SMPS.That is what it sounds like, unless you are only supplying the input signal.
Is that for one unit?Power supply requirement: 24 VDC, 65 Watts max
yesIs that for one unit?
I think that is the inevitable conclusion. I think you might want to reframe the problem to provide an outside source of AC and put a power supply at each device. We still have other issues but you need to solve this one first. This is why AC power distribution won the 19th century battle for what system we would use for residential and commercial power.Correct. My bad. Thanks for clearing this!
The device requiers 24 VDC power supply and its total power consumption is 65 Watts max. (This is too much for an actuator!)
Does it mean that each device requiers 24 VDC/ 2.70 A? And If I have 5A coming from SMPS then it won't be sufficient??
Picture in post #7 suggest a 5A supply on connector X1. I didn't see any better information at the time. I assumed there might be some headroom.Where is it stated they take 5A?
OK, so you have 21 devices each requiring 24 VDC @ 65 watts or let's just call it 3 Amps per device so you are looking at over 60 Amps with the last load at the end of 1,000 foot of cable. Even running AWG 10 cable which is expensive and heavy you are looking at about 2.0 Ohms round trip so the voltage drop would be much greater than what you started with. Granted the full 60 amps is not at end of line but your I*R loss will be beyond anything close to reasonable. We won't even get into the signal line as that is likely not the biggest challenge. Clean rooms have classifications and most constantly monitor particle count using electronics. Most clean rooms I have seen have all sorts of electronics in them. I can tell you this, based on the data you have provided. You are not going to run 24 VDC down a line feeding 3 amp stations along 1000 feet of cabling. The way it would be done is run mains voltage and each of 20 stations has its own 24 VDC supply. Beyond that I simply do not see a feasible way to go about this?All 21 devices are installed in various locations in clean rooms! They probably don't wanna have any active electrical components in clean room!
Agree. Running wire to 1000ft just doesn't seem practical. Is it same scenario for running AC voltage to the same distance?OK, so you have 21 devices each requiring 24 VDC @ 65 watts or let's just call it 3 Amps per device so you are looking at over 60 Amps with the last load at the end of 1,000 foot of cable. Even running AWG 10 cable which is expensive and heavy you are looking at about 2.0 Ohms round trip so the voltage drop would be much greater than what you started with. Granted the full 60 amps is not at end of line but your I*R loss will be beyond anything close to reasonable. We won't even get into the signal line as that is likely not the biggest challenge. Clean rooms have classifications and most constantly monitor particle count using electronics. Most clean rooms I have seen have all sorts of electronics in them. I can tell you this, based on the data you have provided. You are not going to run 24 VDC down a line feeding 3 amp stations along 1000 feet of cabling. The way it would be done is run mains voltage and each of 20 stations has its own 24 VDC supply. Beyond that I simply do not see a feasible way to go about this?
Ron
Here is how it will always play out. The game has rules we need to follow. Wire, all wire has resistivity or resistance. There are formulas we can use to calculate the resistance of for example solid core copper wire. Here is an example of a chart. Using AWG 12 wire as an example the resistance would be 1.588 Ohms. That is One Way single conductor. Round trip we get a Resistance total of about 3.17 Ohms. Now here is the nice part of having the higher voltage. A 24 VDC 5 Amp rated supply has a primary side, just as an example 24 Volts at 5 Amps = 24 * 5 = 120 Watts. Let's call your loads a maximum of 3.0 Amps. So 24 * 3 = 72 Watts. That is the power and that 72 Watts at 120 Volts = 0.6 Amp. So now you have 21 stations let's say at 0.6 amp each or a total of 12.6 Amps. Even using AWG 10 wire the drop would be about 26 volts getting down around 94 volts but most SMPS power supplies run find down to 90 VAC in. Granted this assumes the load at the end of line. WE take the wire resistance times the current to get the voltage drop.Agree. Running wire to 1000ft just doesn't seem practical. Is it same scenario for running AC voltage to the same distance?
What if the average distance be reduced to 150 ft? Does it make any better? Thanks,