To avoid accidental opening of the door, I suggest, installing a three pin appliance module with a different HC / UC. Then use a macro to to reset both, appliance module and UM506 to OFF.
I have been using this setup on my doors for few years and it has been working fine. In fact when door opens, it sends me an email and if it opens at night then it turns on selected light in and around the house. Since DS 10A is also connected to security system, it also sounds chime and turns on flashing LED lights in the kitchen which of course turn off after a set time.
Initially I did use UM506 directly to open and close door but now I use either X10 commander or ActivePhone Pro. These two also allow me to open/ close doors from any where.
If you want, then ask and will send you the setup. It is easy.