If you meant if these boards can perform simultaneous sampling. I got this idea because of your sentence "without retard of time among a channel and another". Those boards cannot perform simultaneous sampling, they have a single DAC for sampling all of the channels. Thus, there will always be a time delay between the sampling of one channel and the next one.
The boards that perform simultaneous sampling are the following PCI-6110, PCI-6111 and PCI-6115.
I hope this information is helpful, and if this is not the answer to your question. Can you state it more clearly, please? Sorry about this.
L Aguila
Applications Engineer
National Instruments