I have connected my cards as follow:
K8061 analog output DA1 to + input of the K8064, and K8061 analog output gnd to - input of the K8064.
This is working fine.
But now I want to connect 7 other K8064 cards to the analog outputs.
I tought to connect all DAx to the + and connect the ground to all - (serial connection from - to - in all k8064 cards)
But now I get an error, all K8064 cards have a 4 time blinking led.
So, wat am I doing wrong?
did you try switching them parallel?
what do you mean with parallel?
Can you give me an example
Hello Swakke,
I have read your question.
I doesn’t see directly a relation between more DA outputs and K8064 kits because there input section is opticaly isolated. Don’t connect K8064 input’s in parrallel to one K8064 input because they can’t deliver current enough. You can contact us by mail or phone 
Tell us also the load of the 8064 pcb’s, etc…
Is problem the same if you control the 8064’s by a regulated power supply(here you can try 8064 in parrallel).