Netonix Forums

Here is a new top-of-tower box that we are deploying at a bunch of our old water tank sites. Fiber/DC up the tower.

Could you label all the devices in the box and their purpose for educational purposes?

Also please connect the chassis ground wire to your ground bus as the 2 through hole studs may not get a good connection to the chassis from the powder coat. If the DC switches are not connected to Earth Ground then ESD protection is rendered inert.

sirhc wrote:Could you label all the devices in the box and their purpose for educational purposes?

Also please connect the chassis ground wire to your ground bus as the 2 through hole studs may not get a good connection to the chassis from the powder coat. If the DC switches are not connected to Earth Ground then ESD protection is rendered inert.

Starting from the top-left, we have:

1. SyncInjector 100 - used to power and provide sync for FSK radios on this site.
2. SiteMonitor II - used to monitor 24V and 48V rails and control the SyncInjector
3. 24V fused bus - powers SyncInjector and SiteMonitor
4. Traco TCL-060-DC 48-24VDC DC-DC converter - used to convert 48V which we run up the tower to 24V for the SyncInjector 100/FSK
5. 48V fused bus - powers WS-12-250-DC, SiteMonitor

Yeah, we'll connect the WS to the ground block. A few sites will be completely floated, so we'll likely not ground anything there. The equipment/antennas, etc are all isolated from metal using rubber matting. I'm debating on not using surge protectors on these sites at all, since the ground will be floated.

You know, you could power the 24V and 48V stuff from the WS-12-250-DC units if you made up an RJ45 jack using all 4 pair and plugged into 1 of the special ports 1-4 that are capable of 24VH and 48VH.

Thus you could power the SyncInjector 100/FSK from the WS-12-250-DC.

This way you run up 1 power cable and it does not matter about voltage drop as the WS-12-250-DC will correct for it and you will always get 24V and 48V (50V actually from the WS-12-250-DC. When a port is set to 24VH or 48VH you get 1.5A of capacity which could power those devices and you have the ability to power cycle them if need be.

Just a thought.

Yep - the only reason we aren't powering the SyncInjector off of a port on the WS is because we don't have any spare ports at this particular site. On sites where we have spare ports we could use a POE-PowerTap [1] to extract power from the WS port to power the SI.

[1] http://tyconpower.com/products/files/PO ... _Sheet.pdf

That is an excellent product, too bad it does not use all 4 pair as that would allow up to 1.5A with our VH ports

Using 2 pair only provides .75A (safely), drawing more than 1A will damage our Ethernet Transformer