Honeywell Satellite XT 9602-0400 FTT Manual To Operation page 10

For applications where wall mounting is not possible, an L-shaped mounting plate with DIN–rail is
available as an option.
L-shaped mounting plate with DIN–rail (P/N 9602.0051.10.02)
! Note:
Do not apply power until system is ready for start-up!
Satellite XT FTT Versions
Installation and Start-Up - Section 2
2-2