Hello Jms,
We have not tested any 1 KW dimmers.
The IoCore has 4 types of output options.
1. DMX
2. RS232
3. GPO which uses a relay to switch its output. (Does NOT support 1 KW)
4. Network
If you find a 1 KW dimmer which can controlled by DMX it should work with the IoCore.
Best regards,
Guido