ABB TTF300 Inbetriebnahmeanleitung Seite 50

Electrical connection
4.4.7 Dust-explosion protection Zone 0/20
Housing design: ATEX II 1D IP65 T135°C
Transmitter design: ATEX II 1G EEx ia IIC T6
Explosion-protection zone
Fig. 17
A Sensor
B TTF300 transmitter
When using the sensor in zone 0, the transmitter must be in EEx ia (category 1G) design.
If the transmitter is designed with intrinsic safety, the power supply must provide an intrinsically
safe circuit.
22 - EN
0
i
a
J
A
Explosion-protection zone 20
B
C Repeater power supply
D Fuse, 32 mA
TTF300
Safety area
D
C
A00123
CI/TTF300-X1