View Full Version : Serial Communications with Denco Precision Units

22-08-2012, 04:53 PM
Very first post and decided to register finally after web searching has lead me here so many times. I have a bunch of different Precision Air Handlers from Denco with three different controllers.
C3-05(I know its actually CAREL controller on this one)
Beta 2
I have the manuals on all of them, and need to get the serial cards that communicate with them. I know exactly which one I need for the C3-05, but for the other two I have no idea what it looks like. Anybody have any idea whom to contact to find out where/if these can be purchased/quoted.


install monkey
22-08-2012, 06:20 PM
Rob Woodworth
GEA Denco Technical Support

22-08-2012, 06:53 PM
Thanks for the help

24-08-2012, 08:09 PM
Trying to figure out what connects to this. This is the board for a Beta 2. Any idea how these controllers can be linked together. Apparently they can be linked somehow. The PL3 socket has the option of RS422, RS232, and a few others. Or just any idea of what kind of general connection hooks to it.


install monkey
24-08-2012, 08:39 PM
is that the 1 thats got a trend display if so either a rj45 plug or tx+- rx+- a 4 pin plug

24-08-2012, 09:13 PM
This is the display for the controller

install monkey
24-08-2012, 10:59 PM
yep thats it, the 1 with 3 levels of passwords and a factory password up down up down up down!

27-08-2012, 02:32 PM
Ok, so nothing connects to that PL3 serial port I pointed out in the first picture or is the rx/tx on the other side of that board?

install monkey
27-08-2012, 03:37 PM
ive dug out the service manual that is well worn, and it states for external bms connection use a rs232 serial output port no pics of board for connections or part numbers

Gideon Beddows
07-10-2012, 02:27 PM
You wont connect different controllers together to talk/control together. they need to be the same controller with the same software version