ABB SensyMaster FMT430 Operating Instructions Manual page 52

52 SensyMaster FMT430, FMT450 THERMAL MASS FLOWMETER | OI/FMT430/450-EN REV. B
... 6 Installation
... Installing the plug-in cards
1 Cover
2 LCD indicator
3 Frontend board (FEB, with integral mount design only)
Figure 38: Installation of plug-in cards (example, dual-compartment housing)
4 Slot OC2
5 Slot OC1
6 Plug-in cards