Using categorical and continuous variables in Deep Learning

I would like to apply a MLP to some business seller data. I found that the data is a mix of both categorical and continuous features. For what I read it is not advisable to feed a neural network with both types of data (reference unknown/unavailable) and I remember that I read that one can use the following model:

Categorical variables-->NN model 1 
                                        ----->NN model 3---->Output
Continuous variables--->NN model 2

So in this model we have two neural networks that are fed each one with only categorical or continuous variables, and then the outputs (from both models) are feed to the third model.

Side note: For what I can see in this proposed model I can end up with an endless "loop", because maybe the output from the model 1 is categorical and the model 2 output is continuous. (?)

My question is how can I model data with a mixture of categorical and continuous features using deep learning (i.e. Neural Networks)? I do not want to use a random forest or any form of decision tree.

Thanks in advance.