I think I've found the answer to my own question - and another question is raised!:
When you connect the USB cable from the UPS to a USB port on the Terastation and then look at the UPS settings on the Terastation, the 'UPS Connection Type' has changed to 'USB Port (APC Style)' This option is not selectable from the list.
Having connected this up I tested the Shutdown function.
I set the Terastation to:
'Shutdown Terastation after 1 minute'
UPS behaviour after Terastation Shutdown: Alive
UPS recovery function: Disabled
With these settings - if I disconnect the power from the UPS the following happens:
- Terastation beeps and the display goes red and the red error light comes on.
- The display shows 'E10 UPS dependent mode'
- After a minute there is a click and the green light around the power button goes out.
- The display stays red.
- The terastation stays in this state - even after 15 minutes - it never appears to shutdown fully.
If I change the 'UPS behaviour after Terastation Shutdown:' from 'Alive' to 'Turn Off' and repeat the test the same occurs except:
- After a minute there is a click and the green light around the power button goes out.
- After a few more seconds the UPS shuts down and (obviously) the Terastation display goes out.
There is no description of the expected behaviour that I could find. My question is - with 'UPS behaviour after Terastation Shutdown:' set to 'Alive' should the Terastaion display stay on well after the shutdown period has expired?