This is a bit long-winded. If I understand correctly, Konnected isn't a security system - just an interface between wired security devices and a smart home hub. HSM would be your security system, using your wired sensors via Konnected.
A standalone security system, like DSC and Honeywell Vista, can and does operate entirely on their own with its own control panel, backup batteries, keypads, siren, etc. It can communicate with Hubitat through an Eyezon Envisalink board, which allows Hubitat to see sensor status and control the arm/disarm states of the security system. The current Hubitat application and driver can be found here. It does interface with HSM, but that's up to you -- I let it sync arm/disarm status via HSM, but the DSC system is ultimately the security system and not Hubitat.
A few advantages to using a DSC or Honeywell type of system. Hubitat or your network can go down and the security system will still function properly. Dedicated hardwired keypads mean reliable arming/disarming and higher WAF (it "just works"). Plus there's an array of wireless sensors available, which are very cheap and far more immediate and reliable than any relying on a mesh.
I arm/disarm primarily in two ways. For away mode, I use the iphone/HTTP presence to detect presence and automatically change the mode to home/away (which sets HSM state, which sets the DSC system's arm state). At night, I use a Lutron Pico remote to switch to night mode, which then puts HSM in Arm - Night , which puts the DSC system into Arm Stay. It then disarms via rule at a certain time in the morning.
If Hubitat is down or it doesn't change state for some reason, the keypads still function normally. It's a more convoluted install, but I think it's worth it.
