Ethernet
In the commercial marine and Megayacht world CAT 5 runs everywhere on
these boats connecting PLC's to enterntainment systems, to communication systems right into PC based NAV. Most of this is based on industrial standards rather then marine standards. It works well with off the shelf componets that are equally priced to NMEA pieces. I would like to see a NMEA gateway to another protocol (other then PC) to allow us to use NMEA 200 data on some of the other equipment already on these large yachts. |
Ethernet
Colin,
I completely agree. There has been a recent thread in this NG on this very subject. See www.gridconnect.com Their serial to Ethernet gateway products should be just what you are looking for and they are DC powered. These completely eliminate the typical NMEA distribution hassle. Please also note that there are appropriate ruggedized and moisture resistant CAT5 connectors also available suitable to the marine environment as well. Steve wrote in message ... In the commercial marine and Megayacht world CAT 5 runs everywhere on these boats connecting PLC's to enterntainment systems, to communication systems right into PC based NAV. Most of this is based on industrial standards rather then marine standards. It works well with off the shelf componets that are equally priced to NMEA pieces. I would like to see a NMEA gateway to another protocol (other then PC) to allow us to use NMEA 200 data on some of the other equipment already on these large yachts. |
Ethernet
"Steve Lusardi" wrote in message
... Colin, I completely agree. There has been a recent thread in this NG on this very subject. See www.gridconnect.com Their serial to Ethernet gateway products should be just what you are looking for and they are DC powered. If I am correct, all of these products only offer a serial point to point connection over ethernet, which seems quite pointless to me when you want to distribute NMEA from instruments to ANY device on the net. None of these devices offer the possibility to *broadcast* NMEA data to any device on the net who wants to receive it. Oh and one other thing: on commercial vessels, including luxurious megayachts, you will not find standard cheap CAT5 cable because that will not pass any marine/industrial regulation. The sort of cable used is much more expensive and meets all sorts of requirements for mechanical, chemical and fire resistance not found in the usual PC/networking market. Meindert |
Ethernet
Meindert,
I believe you can configure these to distribute by broadcast or by IP (multiple). I have downloaded the manual. They appear quite capable. Cable is a problem for me, as I do not have any sources. If you know a good supplier of 50 or 100 pair 16 ga cable, I would really appreciate the tip. Steve "Meindert Sprang" wrote in message ... "Steve Lusardi" wrote in message ... Colin, I completely agree. There has been a recent thread in this NG on this very subject. See www.gridconnect.com Their serial to Ethernet gateway products should be just what you are looking for and they are DC powered. If I am correct, all of these products only offer a serial point to point connection over ethernet, which seems quite pointless to me when you want to distribute NMEA from instruments to ANY device on the net. None of these devices offer the possibility to *broadcast* NMEA data to any device on the net who wants to receive it. Oh and one other thing: on commercial vessels, including luxurious megayachts, you will not find standard cheap CAT5 cable because that will not pass any marine/industrial regulation. The sort of cable used is much more expensive and meets all sorts of requirements for mechanical, chemical and fire resistance not found in the usual PC/networking market. Meindert |
Ethernet
"Meindert Sprang" wrote in
: If I am correct, all of these products only offer a serial point to point connection over ethernet, which seems quite pointless to me when you want to distribute NMEA from instruments to ANY device on the net. If I sold NMEA multiplexers, I wouldn't see any point to Ethernet or TCP/IP either....(c;] Next thing you know, they'll be buying Linksys wireless routers right off the damned shelf and puttin' $5 wifi chipsets in everything! |
Ethernet
"Steve Lusardi" wrote in news:gf9nj8$28b$03$1
@news.t-online.com: 100 pair 16 ga cable Do you realize the diameter this cable will be? I'd have to hang it from the overhead as it won't fit in the wireways! |
Ethernet
Cable is a problem for me, as I do not have any sources. If you know a
good supplier of 50 or 100 pair 16 ga cable, I would really appreciate the tip. 50 or 100 pair? This is why buss cabling is often a better solution. Going along a buss means less cabling bulk and weight. There's always trade offs between buss versus home-run wiring. Buss wiring wins on cost of wire, weight and bulk savings. It's true you may have higher per-device costs in terms of connectors and interface intelligence. But that's often a worthwhile compromise. |
Ethernet
Larry,
Effectively, I am bus wiring. The boat has water tight bulkheads and sea doors between compartments. I have 2 inch pipe ports for through wiring. Every compartment has a termination cabinet. I will max wire compartment to compartment and assign paths as required. The use of preformed, multi-strand cable is easy to seal the bulkhead transits. The DC supply and return is bussed seperately with dedicated bulkhead connectors, where each compartment has its own fusing. All AC power is wired ckt by ckt from a custom made distribution panel with large contactors and electronic relays which allow source switching and load balancing though dedicated 2" bulkhead ports to buss blocks in each compartment. If you know a source for the multi wire 16 ga cable, please let me know. Steve "Larry" wrote in message ... "Steve Lusardi" wrote in news:gf9nj8$28b$03$1 @news.t-online.com: 100 pair 16 ga cable Do you realize the diameter this cable will be? I'd have to hang it from the overhead as it won't fit in the wireways! |
Ethernet
"Larry" wrote in message
... "Meindert Sprang" wrote in : If I am correct, all of these products only offer a serial point to point connection over ethernet, which seems quite pointless to me when you want to distribute NMEA from instruments to ANY device on the net. If I sold NMEA multiplexers, I wouldn't see any point to Ethernet or TCP/IP either....(c;] Oh I do. There is a market for multiplexers that collect NMEA from various devices and distributes it over ethernet to several computer systems on board of larger vessels. Preferably with the possibility of converting certain NMEA data into Modbus for use on the numerous PLC systems on the same vessels. Meindert |
Ethernet
|
Ethernet
On Tue, 11 Nov 2008 09:02:26 +0100, "Steve Lusardi"
wrote: If you know a source for the multi wire 16 ga cable, please let me know. http://www.multicable.com/request_info.asp |
Ethernet
In article ,
Wayne.B wrote: On Tue, 11 Nov 2008 09:02:26 +0100, "Steve Lusardi" wrote: If you know a source for the multi wire 16 ga cable, please let me know. http://www.multicable.com/request_info.asp The Big Time Telco Wire Suppliers have such stuff. Sprint/North Supply is where I get my Telco Wire. -- Bruce in alaska add path after fast to reply |
Ethernet
Hi group
Just thinking. I good fluxgate compass is running at least 10HZ, directly to the wheel/autopilot. Most other NMEA devices need a similar update frekvens. Will at NMES/seriel to ethernet system, be able to be fast enough to colect all the data, forward them, and decode them into seriel again, in a "timely" matter (that is probaply sub 0.1sec??) Or what do you think? sincerely /Børge "Meindert Sprang" skrev i meddelelsen ... "Steve Lusardi" wrote in message ... Colin, I completely agree. There has been a recent thread in this NG on this very subject. See www.gridconnect.com Their serial to Ethernet gateway products should be just what you are looking for and they are DC powered. If I am correct, all of these products only offer a serial point to point connection over ethernet, which seems quite pointless to me when you want to distribute NMEA from instruments to ANY device on the net. None of these devices offer the possibility to *broadcast* NMEA data to any device on the net who wants to receive it. Oh and one other thing: on commercial vessels, including luxurious megayachts, you will not find standard cheap CAT5 cable because that will not pass any marine/industrial regulation. The sort of cable used is much more expensive and meets all sorts of requirements for mechanical, chemical and fire resistance not found in the usual PC/networking market. Meindert |
Ethernet
"Børge Wedel Müller" wrote in message
... Hi group Just thinking. I good fluxgate compass is running at least 10HZ, directly to the wheel/autopilot. Most other NMEA devices need a similar update frekvens. Will at NMES/seriel to ethernet system, be able to be fast enough to colect all the data, forward them, and decode them into seriel again, in a "timely" matter (that is probaply sub 0.1sec??) Yes, but only if you can configure the serial/ethernet gateway to send a frame when a CR/LF is received. This will result in an ethernet frame per NMEA sentence. If you don't do this, the gateway could collect as much NMEA data to fill a reasonably sized ethernet frame 1000-1500 bytes and then send it off. This would result in very irregular heading information. Meindert |
Ethernet
"Meindert Sprang" wrote in
: "Børge Wedel Müller" wrote in message ... Hi group Just thinking. I good fluxgate compass is running at least 10HZ, directly to the wheel/autopilot. Most other NMEA devices need a similar update frekvens. Will at NMES/seriel to ethernet system, be able to be fast enough to colect all the data, forward them, and decode them into seriel again, in a "timely" matter (that is probaply sub 0.1sec??) Yes, but only if you can configure the serial/ethernet gateway to send a frame when a CR/LF is received. This will result in an ethernet frame per NMEA sentence. If you don't do this, the gateway could collect as much NMEA data to fill a reasonably sized ethernet frame 1000-1500 bytes and then send it off. This would result in very irregular heading information. Meindert http://www.i****chdogs.com/DataSheets/WF111803.pdf That's probably what ours does. I've never seen the data coming into The Cap'n through the virtual serial port on a Dell Latitude laptop balk over the wifi. The serial port on the webfoot is plugged into the serial port on a Noland NMEA multiplexer. The Webfoot ethernet port feeds a port on an old Netgear wifi router. The data is fast and smooth even at the other end of the dock! The Cap'n thinks it has COM4 hooked to it, when in reality its via wifi. Caused quite a stir the first time I took it into the yacht club bar running. Now you can even see the AIS plotted on it! |
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