Integrated Standby Instruments System (ISIS) power source?

[rionthai]

Integrated Standby Instruments System (ISIS)

what supply the power for it?

[IFixPlanes]

At the A320 Fam.: 401PP (DC ESS BUS) and/or* 703PP (DC HOT BUS).
At the A330/340 Fam.: 403PP (DC ESS BUS) and/or* 701PP (DC HOT BUS).

* : "and/or" depends on the age and the modification status of the A/C

[john_tullamarine]

Appears to be a duplicate of the post in Questions ?

http://www.pprune.org/questions/3875...its-power.html

We'll leave the other one run.