Siemens MAGNETOM Skyra fit Operator's Manual page 48

3 MR system components
(1) Gradient cabinet
(2) Control cabinet
(3) System separator
Gradient cabinet The gradient cabinet contains the power electronics for generating
the magnetic field gradients.
Control cabinet The control cabinet includes different electronics components to
operate the MR system.
The control cabinet includes a sequence-programmable, optical
trigger signal output which can be made externally accessible by
Siemens Service via installation of a fiber optic cable.
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MR System | Operator Manual
Print No. M6-04401.621.02.02.02