Help with B&G network

[AndyDavies]

I've been given a Triton t41 multifunction display which I'm hoping to add to my B&G network as a chart table repeater.
Naively, I thought this would be a simple case of plugging a cable into the back of it and into a vacant terminal on the boat's NEP-2 expansion port.
The t41 has 5 pins arranged like the spots on a dice, the expansion port's 5 pins are in a circular pattern. The only cables I have been able to find have the circular pin configuration at both ends.
Can anyone advise if there is an adapter available or where I can source a cable with the two different pin configurations?

 

[PaulRainbow]

I've been given a Triton t41 multifunction display which I'm hoping to add to my B&G network as a chart table repeater.
Naively, I thought this would be a simple case of plugging a cable into the back of it and into a vacant terminal on the boat's NEP-2 expansion port.
The t41 has 5 pins arranged like the spots on a dice, the expansion port's 5 pins are in a circular pattern. The only cables I have been able to find have the circular pin configuration at both ends.
Can anyone advise if there is an adapter available or where I can source a cable with the two different pin configurations?

You cannot connect the T41 Simnet (NMEA 2000) cable to the NEP-2 Ethernet ports. What other devices are on the B&G network ?

 

[wonkywinch]

As Paul says, the T41 is an NMEA not ethernet device. You may have unused ways on a joiner or somewhere to swap a joiner for larger one. Or a T into the NNEA somewhere.

B&G NMEA networks

 

[AndyDavies]

Thanks for the replies. I'm sure I don't have to state that I'm starting from a very low knowledge base. The boat has two Zeus plotters, two T41s, wind, Airmar, Autopilot and V50 VHF connected to its NMEA 2000.
What, I think, to be the backbone connections are photographed below but they have a different plug to the new T41 I hope to install. For starters, is the unused connection, circled, a valid port for the T41?

 

[wonkywinch]

The one you indicate appears to have a 120 ohm terminator in it, which is part of the network requirement.

The T41 does connect into one of those multi connectors but you need a micro C to simnet lead (see link below). Rather annoyingly, B&G only make that connector block in 3 way or 7 way (you have one of each in your photo). It may be easier to swap the 3 way for a 7 way (you can leave unused sockets empty but you do need to plug the terminator back in).

You'd end up using four of the 7 ways in the new block.

https://www.force4.co.uk/item/Simrad/Micro-C-female-to-SimNet-4-m/

The instruction manual for the T41 is here -

https://busse-yachtshop.de/pdf/bg-triton-install-en.pdf

Simnet connector block - (may find cheaper used one on Ebay)

https://www.force4.co.uk/item/Navico/SimNet-7-Prong-Multi-Joiner/

 

[AndyDavies]

The one you indicate appears to have a 120 ohm terminator in it, which is part of the network requirement.

The T41 does connect into one of those multi connectors but you need a micro C to simnet lead (see link below). Rather annoyingly, B&G only make that connector block in 3 way or 7 way (you have one of each in your photo). It may be easier to swap the 3 way for a 7 way (you can leave unused sockets empty but you do need to plug the terminator back in).

You'd end up using four of the 7 ways in the new block.

https://www.force4.co.uk/item/Simrad/Micro-C-female-to-SimNet-4-m/

The instruction manual for the T41 is here -

https://busse-yachtshop.de/pdf/bg-triton-install-en.pdf

Simnet connector block - (may find cheaper used one on Ebay)

https://www.force4.co.uk/item/Navico/SimNet-7-Prong-Multi-Joiner/

That's really helpful, thank you. Now I now what I need and I must learn not to be so wildly optimistic about 'simple' upgrades.

 

[PaulRainbow]

That's really helpful, thank you. Now I now what I need and I must learn not to be so wildly optimistic about 'simple' upgrades.

If you plan to fit the T41 near the existing one, all you need a a micro C to Micro C, daisy chain the two T41s.

 

[wonkywinch]

If you plan to fit the T41 near the existing one, all you need a a micro C to Micro C, daisy chain the two T41s.

Does this work? The manual (link above) advises daisy chaining them only if they remain a series component of the backbone rather than off a drop cable so the OP should determine how his existing displays are currently connected.

Andy, it may look complicated but it is almost "plug and play".

 

[AndyDavies]

Thanks, but they are some distance apart via a rather tortuous cabling route. My V50 VHF is nearby but only has one NMEA socket so I presume that's a non-starter?

If you plan to fit the T41 near the existing one, all you need a a micro C to Micro C, daisy chain the two T41s.

 

[wonkywinch]

What's that orange coloured plug in bottom left of your photo? It looks like it might be a coiled up spare micro C labelled "companion way". Where is that connected to?

Ignore post, it's an ethernet cable.

 

[PaulRainbow]

Thanks, but they are some distance apart via a rather tortuous cabling route. My V50 VHF is nearby but only has one NMEA socket so I presume that's a non-starter?

In that case, follow post #5