Tztl12/15 15 Volt power.

[Alaskamariner]

Making preparations to install DSR4DNXT, a Tztl12f and Tztl15F, SC33 and a dual station Navpilot 711C. Reading thru the documentation I see references to 15 volt dc power. This will seem stupid, but where do I get the 15 volts from?

Thanks
Phil

 

[kicker]

Hi Phil,

Which units manual are you referring to?

 

[Alaskamariner]

The installation manuals for Nav Pilot 700 Series and Multi Function Displays TZTL15F and 12F. For the autopilot 15 Volts shows in the interconnect diagram, drawing number:CC7278-C01-F. In the display install manual, page 2-2 section 2-3, multi cable, Red\White wire CAN bus power input +15 Volt, also in the interconnect drawing, page S-1, drawing C4487-C01-L
After reading the books again I'm thinking that the 15 Volts comes from rather than going to the devices. If that is correct I feel a bit less stupid. Also if I understand the books correctly I will need a hub-101 to make all the connections.

Thanks,
Phil

Side note; had another boat; fished halibut in Bering Sea and Gulf of Alaska for 30 plus years and Furuno electronics never let me down. :respect

 

[Taniwani]

Hi Phil,

the connections labeled 15V are inputs in both cases, the TFT and the AP. But they are optional and are meant as a possible way to power the NMEA2000 backbone by connecting power to such an input. NMEA2000 spec allows for a voltage range of 9-15V and I think Furuno just labeled these with the maximum allowed voltage.

Note that you should power the NMEA2000 backbone from just one point unless you have multiple separately powered sections.

The interconnect diagrams show everything that can be connected. On the Autopilot connect diagram it shows a choice of using the junction box FI-5002, or below it an alternative using a series of T-connectors, where one of them is shown as a power feed point labeled 15V.

The power feed on the junction box is labeled 12V, but it is exactly the same as with the T-connector below. You may use one of them to feed power to the NMEA2000 bus and it would come from your 12V source.

Also the TZT2 display has such a feed point labeled 15V that may also be used to feed power to the NMEA2000 bus. Note that none of these devices acts as a power source. The feed would also work if the TZT2 is powered down.

Regarding your question about the Hub-101, it has nothing to do with the NMEA2000 bus. It is needed for the ethernet connections when you have more than just two devices on the NavNet ethernet. So, if you just have an ethernet based radar and one display, you could connect them directly. The autopilot does not connect to the ethernet.

 

[Alaskamariner]

Plan is for two TZTL MFD's, 12 and 15 inch, and DRS4DNXT, Autopilot and SC33 and a Laptop. Laptop could probably go with the wireless, although I prefer wired.

Thanks,
Phil

 

[Taniwani]

Hi Phil,

Autopilot and Sat-Compass would both be connected via the NMEA2000 bus.
With 2 TZT2 MFDs and an NXT Radar you will need an ethernet hub or switch.
The HUB-101 is such an option and it is a true hub, something hard to get these days. But it is also quite expensive. Most off-the-shelf switches cost not more than $20 and will do the job. But beware that they do not get too intelligent.

A hub is the most unintelligent device as it repeats every frame that comes in on every other port, but with just three devices this will not be a problem. A switch learns who is connected to a particular port and then sends frames only out on the port that the destination host is connected to. Broadcasts and multicasts however go out on all ports.

You are likely to get problems using routers that are also some times called Level3 switches.
Also, if you see features like VLAN and QoS listed for a switch, go for something less intelligent.

Regarding your laptop, you need to see why you would want to connect it to the same network. One reason would be MaxSea TimeZero which is supposed to work with the TZT2's and the NXT radar. For most other things it wouldn't buy you much, except that you can receive a NMEA 183 stream of port 23, which is output by the TZT2 MFD and contains most of what it gets via N2000. But if you do it, do it with a separate network adapter in your PC. You cannot connect the NavNet ethernet to your internet router.

The wireless connection of the TZT2 MFD is a completely separate thing. It can either act as an access point to which you can connect with mobile apps, or it can itself (the TZT2) connect as a client to an access point and that way reach the internet, for weather and updates, but you cannot have both functions at the same time.

Harald

 

[Alaskamariner]

I know that the Hub-101 is rather spendy, and some of the documentation I have seen says one of the Netgear Switches are compatible. My only concern with an off the shelf Netgear would be finding a power supply for it as they come with a little 110 to 12 volt power supply.
I have a decent Gen Set , but don't run it all the time. If you know of a part number for a 12 volt to 12 volt adapter I would by one in a heartbeat.

Thanks,
Phil

 

[Taniwani]

What I did was to cut the cable off of the AC adapter and wire it to my 12V supply adding a fuse holder with a 0.5A fuse. Doing it that way you need to consider two things, one is that on a 12V boat system, the voltage fluctuates up to 14V during charging, the other is that you don't have galvanic isolation.

Both, I think will not be an issue with most switches that take 12V DC in. Regarding the galvanic isolation, ethernet as such is isolated, but the shield (of the shielded ethernet) would should not be connected to -12V. At least that's what I found on the Netgear switch I use.

Note though, that while all switches feature an AC adapter, not all are 12V on the other end. I have seen 9V and 5V DC versions.