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anyone have spare LowranceNet 120ohm terminators?

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anyone have spare LowranceNet 120ohm terminators?

Old 02-06-2007, 09:34 PM
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Default anyone have spare LowranceNet 120ohm terminators?


hey all, I'm slowly assembling the various bits and bobs needed to create my NMEA2000 network with Lowrance stuff and my E-TEC engine. I currently have the data cable for the E-TEC, the LMS-337 combo unit with ext. gps antenna, and I have the LMF-400 gauge on order. After reading through some of the info, it seems that I will need 120ohm terminators for my system as opposed to the 60ohm ones that came with the 337. I'm assuming my LMF-400 will come with a T, so in hopes of me not needing to buy a new Node Kit, I'm wondering if anyone has any 120ohm terminators laying around that they may be willing to part with? If I'm wrong in thinking that I need them, please let me know.
Also, do I really need to add the speed paddlewheel that came with the 337? The GPS will provide me with speed, I know. My main concern is how to eventually get MPG calculations on the LMF-400. Will the 337 and 400 talk to each other and figure it out? Will I able to display any of that on the 337 screen or will I have to rely solely on the 400 gauge?
Thanks for any help you can offer!
Old 02-07-2007, 04:22 AM
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Default RE: anyone have spare LowranceNet 120ohm terminators?

I think you will need more than just the two 120ohm terminators. If you are currently just running the LMS and antenna with a 60ohm terminator the antenna connects to the cross section of the T and not the tail. When you add further devices this needs to change to form a linear structure with all devices coming off the tails and the cross sections forming a complete backbone with a 120ohm terminator on each end.

Assuming you have T's available for the engine interface/LMF gauge and LMS you will need one more for the antenna, hence the idea of a network expansion kit containing two 120ohm terminators and an additional T.

If you want the MPG calculation to come from distance travelled over the ground then the GPS input will be all you will require. The LMS will provide the GPS data for the network and the fuel used info will come from the engine. The LMF will do the calculation and you will be able to repeat the data on the LMS.

TT
Old 02-07-2007, 08:58 AM
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Default Re: anyone have spare LowranceNet 120ohm terminators?

okay, i think i've figured that i will need 4 T's for my current setup. E-TEC cable to (1) T (terminated with 120ohm on one end), extension cable up to another (2)T, LMF-400 off that same (2)T, (3)T attached with GPS puck coming off of it, (4)T attached with 337 coming off it (and then terminated with 120ohm). sound right?
Old 02-07-2007, 09:37 AM
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Default RE: anyone have spare LowranceNet 120ohm terminators?

I might have a terminator or two laying around that I can send you. Will have to check with my mechanic though as he has all (if any) spare parts that I had leftover. He might be able to cough one up.

As far as fuel management is concerned, you don't need the paddle wheel speed sensor that came with your LMF. You might (and probably do) need a memory module to get full functionality out of your fuel management system though. It's been nearly a year since my system was installed and I haven't used my boat much in the last 3-4 months so my memory is a little fuzzy.

I'll see what I can come up with and get back with you.
Old 02-07-2007, 10:23 AM
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Default RE: anyone have spare LowranceNet 120ohm terminators?

Old 02-07-2007, 10:29 AM
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Default Re: anyone have spare LowranceNet 120ohm terminators?

Drew, you have a job with us anytime you want it
Old 02-07-2007, 04:37 PM
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Default Re: anyone have spare LowranceNet 120ohm terminators?

thanks for the help guys. Drew, your drawing looks exactly like the one that I made this morning for myself. Anyhoo, I just went ahead and ordered the expansion kit. I had a bunch of rewards points with BassPro, so it wasn't bad.
Old 02-07-2007, 05:48 PM
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Default Re: anyone have spare LowranceNet 120ohm terminators?

Keep in mind that most likely the LMF400 will not display the E-TEC diagnostic or engine warning alarms. I know for Suzuki you must have the Suzuki brand gauge as it has special software to recognize the Suzuki engine interface. You may want to consider adding an EP15 fluid level probe for your fuel tank sender. That will put accurate fuel level information into both the LMF400 and LMS337.
Old 02-07-2007, 07:18 PM
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Default Re: anyone have spare LowranceNet 120ohm terminators?

lakensea, yeah I've heard that. I'm not too worried about it, though. The warning alarms that come with the Systemscheck Tach should be fine. And from what I understand, if the gauge did show the code, I'd still have to figure out what the code meant, meaning "dealer" anyways. As for adding sensors, I'm sure my need for gadgets will eventually have me adding everything. thats the great thing about this system. sooner or later, all of my gadgets on the boat are gonna be worth more than the darn boat itself. I mean, it's only a Sunbird!

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