Electrical connections
30 TTF300
OI/TTF300-EN
5.5.6 Dust-explosion protection Zone 20
Transmitter design: ATEX II 1D IP 65 T135 °C
Explosion-protection zone 20
Safety area
B
C
A00130
J
A
D
E
Fig. 16
A
Sensor
B
Transmitter TTF300
C
Power supply
D
Fuse, 32 mA
E
Interface for LC display
The electric circuit of the transmitter must be limited by an upstream fuse per IEC 127 with a
fuse current rating of 32 mA. This is not required if the power supply is in intrinsically safe "ia"
design.