44
SensyMaster FMT230, FMT250
THERMAL MASS FLOWMETER | OI/FMT230/250-EN REV. C
… 7 Electrical connections
Opening and closing the housing
WARNING
Risk of injury due to live parts!
When the housing is open, contact protection is not provided
and EMC protection is limited.
• Before opening the housing, switch off the power supply.
Figure 40: Cover lock (example)
NOTICE
Potential adverse effect on the IP rating
• Make sure that the cover of the power supply terminals is
mounted correctly.
• Check the O-ring gasket for damage and replace it if
necessary before closing the housing cover.
• Check that the O-ring gasket is properly seated when
closing the housing cover.
To open the housing, release the cover lock by screwing in the
Allen screw
1
.
After closing the housing, lock the housing cover by unscrewing
the Allen screw
1
.
Position of the terminals
1
Terminal cover power supply
2
Fuse
3
Terminals for power supply
4
Terminals for Modbus®
5
Terminals for digital outputs
6
Local operating interface
7
Clamp for shielding and strain relief
8
Internal ground terminal (shielding)
9
External ground terminal (potential equalization / functional ground)
Figure 41: Terminals on the device