Alarm Output from J1939
Alarm Output from J1939
(OP)
I will be purchasing a new marine gen set soon and it is going to have J1939 can bus. I would like to tie it into my ancient alarm panel that requires relay inputs so I don't have to use pressure and temp switches. The engine will have J1939, Rs485, and eternet out. I need 3 relay outputs. So far I can find none that have an actual relay output, just sourcing and sinking. I know I can use that to switch relays but I'm looking for a single component solution.





RE: Alarm Output from J1939
I would expect that generally you'd want to convert the J1939 to modbus/RTU using a protocol converter(-$300)
and pump the data into an inexpensive PLC (~$140).
Provide a simple touch screen Human/Machine Interface ($300).
Write some logic that observes and displays all the engine/generator values you're interested in and allows you to set and modify the alarm trip points of interest.(~couple of hours work)
Use the PLC's digital outputs or relay outputs(selected at purchase) to tickle the ancient alarm panel as desired/needed.
You could also use the PLC and HMI to do other unrelated logic missions you might have.
Alternatively you might be able to bend a J1939 dash board controller into doing your bidding, yes with relays, in lieu of the normally driven idiot-light outputs. (example: Systems_Link)
Keith Cress
kcress - http://www.flaminsystems.com
RE: Alarm Output from J1939
RE: Alarm Output from J1939
Thing's about $300 then they bend you over for the software... $500. Ouch.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Alarm Output from J1939
RE: Alarm Output from J1939
Keith Cress
kcress - http://www.flaminsystems.com
RE: Alarm Output from J1939