Outdoor UPS for PoE and 1 Gbps Applications
We need a outdoor UPS with projected full load (<60 W total) for 40 minutes. This is to drive IEEE 802.3af Power over Ethernet to 2 loads requiring both PoE and 1 Gbps interconnection (additional ports a plus but not required). What best option can you
120V Photocell Power Tap with Dimming Control
I am interested in Ripley Lighting Controls #5731-20-1 or any other 120V Photocell Power Tap which retains dimming vontrol. Will the power to my appliance turn off at daylight?
FP289A-120-CNB-A 7-pin power tap vs FP289A-120-CNB 3-pin power tap
Can I use a 7-pin power tap instead of a 3-pin power tap? Does the 7-pin work well ignoring the control pass through pins?
POE output voltages
I have a Netgear switch supporting POE (IEEE 802.3at) on 8 ports. I am unclear on the output voltage levels, is it 48V or 56/57 V? The datasheet clearly shows the power is 30W, but what is the voltage? Seen several unclear and conflicting responses online.
3 pins on a barrel jack
Shopping for a 2.1 x 5.5 mm barrel jack DC connector for a small project I intend to power using a 12VDC 1A power supply. From the images I see 3 pins, does the connector have a grounding contact within the "barrel"? Here's an image: My intention is to
barrel connectors polarity
I'm new to networking and a bit confused about the dc barrel connectors on the power supplies for my devices. I've seen that sometimes the inner or the outer conductors can be positive or negative, depending on how the current flows. Could you explain
D-Link DMS-108 Power Supply
I have the D-Link DMS-108 network switch and I'm in need of a new power supply for it. I have a couple of options but I need some expert help on the pin polarity. Can replacing with a negative or positive pin polarity damage my device?
step-down photocell power taps
For a unit that steps down voltage from 480 to 120VAC, would it supply power to my 110 VAC battery charging system without faults? what is the output range?
No Control Pass Through
For streetlight power taps, can you please explain the 3- pin (no control pass-through). Does that mean that we can not plug a photo cell back on top on this unit to control the street light?
Alfa Networks DDC4818
I have the DDC4818 step down adapter and need to know how to wire the input plug - What is the center conductor +48 or -48V?
POE compatibility
There's unclear guidance on PoE voltage requirements, notably with my TP-Link WA901ND WiFi Access Point, labeled PoE-compatible but without specified voltage needs. It arrives with a 12V adapter and a PoE injector for network cable power supply. What
PHTCELTAP alternatives
Hi, we are looking to use photocell power adapter tap ( SKU:PHTCELTAP) for our project. Quick question regarding electrical specification, the input voltage range is 90-480V and output voltage is 120VAC. Does that mean if we install the power tap on 480V
POE Classes
When buying the Aruba Instant On 1930 8G Class4 PoE 2SFP 124W Switch (JL681A) , what's the correlation between these classes and the other 802.11 standards? Kindly, explain. PS! I really appreciate the customer service and technical support available
Aruba Instant On 1930 8G Class4 PoE 2SFP 124W Switch (JL681A)
For the Aruba POE switch mentioned in the title, what is the maximum POE output per port? I can see its rated for a maximum power of 150.2W. My assumption is this total output power should be for the whole switch (so divided among the 8 ports).
Cable Lengths
For PHTCELTAP photocell bypass adapters, what's the maximum length of cable I can add as an extension to the 10 ft cable it came with. I know it comes with the 16 AWG cable, but i want to add a 14 AWG cable. What are the possibilities?
Samlex SEC-1223 series connection outcome
For these desktop power supplies Power Solutions - AC-DC Power Supplies - Page 1 - Rfwel Engr E-Store, what would be the outcome connecting two identical units to double my voltage. Say two of the Samlex SEC-1223 (Samlex SEC-1223 23A Desktop Switching
Ubiquiti POE-24-24W
I have the Ubiquiti POE-24-24W, can i use it to power a POE compatible device without necessarily using its data port? Also is this a standard IEEE POE device or passive device? I can share pics ;)
Active POE Standards
I have an 802.3af POE switch that i'm not ready to replace yet. However, i have a camera rated for 802.3at. Can I connect the camera to the switch via a POE injector brick? Or would this damage the injector/ camera?
Cisco Catalyst 2960S-24PD Layer 2 - Gigabit Ethernet Switch, with 24 POE ports
We have reworked our network to have the Cisco Catalyst 2960S-24PD Layer 2 - Gigabit Ethernet Switch, with 24 POE ports. This switch will offer data and power connection to different Wi-Fi access points and IP phones. The switch is connected to a reliable
RF Inteference on Switch Mode Power Supplies
Hi, I have recently acquired a Samlex DC (SEC-1223 23A) power supply from your store - it is a switch mode power supply. I had some interesting points of discussion I wanted to engage you guys on. First, how is an SMPS affected by received radio interference?
TW-LP-N-P-BHJ
What is the maximum RF POWER input rating of this unit (TW-LP-N-P-BHJ)https://shop.rfwel.com/terrawave-tw-lp-n-p-bhj-lightning-arrestor-0-6-ghz-n-female-n-male/ by Terrawave?
DIN4 Relay
Hello guys just got the DIN4 relay from Digital Loggers. I want to know which temperature sensors it is compatible with? Can i use other 3rd party sensors?
POE Tester
Do you have recommendations for a POE tester? A pretty simple and reliable unit.
HPN4007D
Is the HPN4007D power supply model MIL-STD-461 compliant?
solar array sizing
I have been contemplating a solar installation for a barn here in Key West, Fl. My plan is to do my own research on equipment need and power consumption, so far so good. My question to anyone here is on what is preferable between a 12V or 24V DC installation,
Zhaga 18 and ANSI C136.10
I have been seeing a lot of conversation on the Zhaga (Book 18 Standard) being a replacement for the NEMA ANSI C136.10 receptacles. What's the possibility and what would be the fate of installations the C136.10 standard luminaires, photocontrols and power
Normal photocontrol Operation
For the PHTCELTAP light pole tap, I just want to make sure, after installing this unit between (3-pin) twistlock photocell and light fixture, would photocell still function as normal, for example, turn lights on at dusk and off at dawn?
Passive PoE
Passive PoE devices are way cheaper than active ones from my research. I've seen this blog: https://support.rfwel.com/portal/en/kb/articles/poe-introduction My question is on the possibility of identifying my device power requirements and just getting
Power Tap Grounding
For any of these, do we have a model with ground connection? Meaning could I have a hot, neutral and ground? I cant seem to find or confirm the presence of grounding in some units like the FP285A. Is the grounding receptacle shown in the image "fake"?
3 Pin Mini-Link Power Taps
For the following units, what is the terminal allocation for the 3 pins?
Maximum allowable distance between my PSE and PD
I need to an install an access point (Preferably the Meraki Go) to improve coverage at a site approximately 300ft away. Would a POE switch deliver power and data reliably over this distance? And if so would you recommend a specific PSE? or any other
FP289A-120-CNB step down light pole tap
For your streetlight power tap adapters like the step down (FP289A-120-CNB), what is the warranty and what type of technical support is available to installers or maintenance personnel? What safety features are available to protect against electrical
Battery Sizing for Solar Installations
There is this formula for sizing batteries for a solar installation: Battery size in Ah = Total Wh per day/ (Battery Loss x Battery Depth of Discharge x Nominal Batter Voltage). What is the difference between battery loss and depth of discharge? Why do
Zhaga 18 Compatibility
Hello, For the Zhaga Book 18(ANSI C136.58) receptacles, can we have light pole taps like those found here: https://shop.rfwel.com/power-tap/
Battery Array Sizing
There is this formula for sizing batteries for a solar installation: Battery size in Ah = Total Wh per day/ (Battery Loss x Battery Depth of Discharge x Nominal Batter Voltage). What is the difference between battery loss and depth of discharge? Why do
POE power taps
We're looking for a photocell power tap to convert 480vac to POE (48vdc) for a Cisco access point. I saw this FP287A-120-ADN-A, but it only works with 120vac. Can anyone share if there are singular and complete units that can do this for 480vac?
Cisco AIR-PWR-ST-LT-R3P
I have asked this question in a couple of forums with no response. For this specific streetlight power tap from Cisco (AIR-PWR-ST-LT-R3P), what is its actual voltage output. From the manual it is rated for 100-277V AC operation, does this mean it will
stepped-down power for APs
I have some cisco 1570 access points that I want installed outside, I have a couple of AIR-PWR-ST-LT-R3P to tap the light from the pole (not enough though). The 4 ft. cable is quite short for the position I want the unit at, could you recommend a unit
Midspan and Endspan PoE devices
I am new to PoE equipment and i want to install some cameras on my property. I've been researching on equipment as i want to do this myself, my intention is to have 4 cameras at different positions. I've seen people talking about midspan and endspan devices.
IDC-200A-24DC-DC Converter
I just got a BLUETTI EB3A Portable Power Station. I need to find out if I can use the SAMLEX IDC-200A-24 Switching DC-DC Converter 9-18V Input. Its input would be from a 12VDC 20Ah LiFePO4 battery. The DC power requirements for the the EB3A are 200W max,12-28VDC
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