SFP Temperature about 85ºC in CRS212-1G-10S-1S+IN

RouterOS General
1

Hi,
I use all SFP modules in this switch, in a 20ºC-30ºC room.
The temperature in ALL modules is over 80ºC!, even 89ºC

Is normal??
In the CRS212-1G-10S-1S+IN, all SFP modules are too closer…