You can Identify the CPU/panel type via the reports. Login with a lvl4 password, goto report -> revisions.
QS4-CPU-1 or QS4-CPU-2, the 1 or 2 is the size of the front panel, can it hold 1 or 2 switch/led panels
QS4-5 or QS4-12, 5 or 12 is the size of the cabinet two DIN rails or one. 5 or 12 slot cabinet
CPU/Panel types, when programming you need to know which CPU you have.
QS4-12 Intelligent - 12 Slot
QS4-5 Intelligent - 5 Slot
QS1 Intelligent - 1 Slot
QSC-12 Conventional - 12 Slot
QSC-5 Conventional - 5 Slot