MKII touch screen - C-bus communication failure

HI
I have jsut added a MKII to a existing network, plug it in and it boots up. Screen then alternates between Unit not been programmed and Warning - C-bus comms failure. I also notice when its plugged in the c-bus light flashes on the PCI (mostly on littel flash off then on for a about 3 seconds then flashes off again)

I have loaded the USB driver on toolkit

I also cannot connect to the touch screen in PICED, nor see it when scanning the network. I am using latest version of both.

Thanks

 

It sounds like your network voltage is too low. C-Bus Devices flash their C-Bus LED at about 4Hz when the network voltage drops below 20V and the C-Bus LED turns off when the network voltage is below 15V or there is no C-Bus clock signal.

The MKII B&W Touchscreens draw 65mA, which is 25mA more than the old one and approximately a third of the power provided by one DIN dimmer/relay with built-in power supply.

 

Network voltage is 30v+ on all units with the screen plugged in. Network has:
1 x12ch ralay with power supply 200ma
1 x 12ch relay no power,
1 x 350ma power supply,
1 PC interface
6x 4 button swithces
3x PIR.

So by my calculations should be enough?

 

Does your switches etc still work while the screen is connected to the network?
Have you checked the basics eg: the connections on the back of the screen are right (no legs crossed etc) one clock/burden turned on etc

If you can't scan the C-bus network with toolkit and find the screen and you can't connect to the screen via USB with PICED then it sounds like you might have a faulty screen.

 

I have checked all the basics, everything stops working when the screen is plugged in and can connect to the screen via PICED. Cant scan so I cant tell if the burden is enabled on the screen.
Do the screens come factory default burden enabled?

 

Sounds more & more like a faulty screen. Might be worth giving Tech Support a call.