Why this decision matters
Backup for one component does not prove the complete required function remains available.
Work through the actual task
- Identify the supply for station, monitor, network and release hardware.
- Ask the installer to explain the intended outage and safe-exit behaviour.
- Ask the installer to explain the documented backup design and safe test procedure for your equipment.
Worked example
The screen and electric lock use separate power supplies. This is a hypothetical example, not a completed customer installation.
The useful evidence at the end of this example is: A component power schedule and documented release arrangement.
Limits and follow-up
An intercom relay does not power every lock. Ask the installer to confirm the lock supply, release method and safe exit arrangement.
If the relevant check cannot be completed, record what remains uncertain and who will resolve it before work or sign-off proceeds.
Sources and equipment references
Checked for the product, supplier or information details used here. Exact procedures depend on the installed model; these links are not a substitute for its instructions.