S2/SHS Problem

[danderer]

Based on your recommendation I've purchased an EV-200 to replace my S2. I've started to remove the old equipment and hit the first unexpected issue.

When I unplug the S2 from the existing ST1 network it appears that the GPS and ST8002 are no longer getting power. While I had assumed the E80 Classic would power the ST1 it appears that is not the case. Even though the ST8002 will be removed during this process, the ST1 network still needs to power the GPS and S100.

Looking more closely, it appears the original installer did not connect the red wire from the E80 Classic to the ST1 network.

Q1: Is the S2 in fact the power source in my existing network?

Q2: Once the S2 is removed, can/should the E80 Classic power the network if the red wire from it was connected?

Q3: Is an alternate/better solution to just to use a spare ST1 cable to provide the power (red & grey wires) from a 12V source?

Attached are diagrams more accurately reflecting the state of my current network and my proposed solution.

Thanks.