Well first off that power tab is not designed for 48VH as it only uses PINS 4,5 for positive and PINS 7,8 for negative
48VH needs PINs 1,2,4,5 for positive and PINS 3,6,7,8 for negative which spreads the load out over all 8 wires not just 4
It is fine for 48V as it only uses 2 Pair or 4 wires to carry current which is fine for our 48V POE option.
All this is explained in this post as to what each POE option uses as far as PINs and polarity:
viewtopic.php?f=6&t=1178#p8809
Question: Can I power this device with Netonix.
Answer: Our switches are "passive" POE which means if POE is enabled on a port the power is live so if you plug in a cable that is shorted or the piece of equipment is bad or has an incompatible polarity PIN OUT you will damage the port in the switch and probably the equipment, this damage is not covered under warranty.
There are 4 Pairs and 8 PINs in an Ethernet Cable:
Pair 1: White Orange.(PIN 1 ) & Orange.(PIN 2) is POSITIVE
Pair 2: White Green...(PIN 3) & Green...(PIN 6) is NEGATIVE
Pair 3: White Blue.....(PIN 4) & Blue.....(PIN 5) is POSITIVE
Pair 4: White Brown..(PIN 7) & Brown...(PIN 8) is NEGATIVE
24V POE Option @ .75A - constant draw can surge/spike to 1A:
802.3af/at MODE B [i]pinout[/i]
Pair 3 / PINs 4, 5 are POSITIVE
Pair 2 & 4 / PINs 3, 6, 7, 8 are NEGATIVE
48V POE Option @.75A - constant draw can surge/spike to 1A:
802.3af/at MODE B [i]pinout[/i]
You would use this option to power most 802.3af/at devices like IP Phones and Cameras
Pair 3 / PINs 4, 5 are POSITIVE
Pair 2 & 4 / PINs 3, 6, 7, 8 are NEGATIVE
24VH POE Option @1.5A - constant draw can surge/spike to 2A:
802.3af/at MODE A & MODE B [i]pinout combined[/i]
Pair 1 & 3 / PINs 1, 2, 4, 5 are POSITIVE
Pair 2 & 4 / PINs 3, 6, 7, 8 are NEGATIVE
48VH POE Option @1.5A - constant draw can surge/spike to 2A:
802.3af/at MODE A & MODE B [i]pinout combined[/i]
Pair 1 & 3 / PINs 1, 2, 4, 5 are POSITIVE
Pair 2 & 4 / PINs 3, 6, 7, 8 are NEGATIVE
So now that you know what the PIN OUT is (which is in our Spec Sheet on page 17 and in the product description on our web store) all you need to do is look at the spec sheet from your device and see which POE option you can use.
If they do not specify the PIN OUT polarity break out a multi-meter and but one end off of a patch cable and strip the wires and figure it out on your own.
Also if they have a bridge rectifier circuit like MIMOSA the device will swap the polarity the way it wants it.
WARNING - If your equipment is not specifically designed to accept power on all 4 Pairs do NOT use a VH POE option.
By using that POE tap of you try and draw more than .75A / 37.5 watts constant or 1A / 50 watts spikes you will damage the Ethernet transformer as the trans former is rated at a MAX of 1A per pair.
