Zone 2 - ABB TTR200 Operating Instructions Manual

Electrical connection
5.5.5

Zone 2

Transmitter design: II 3G EEx nA II T6
Fig. 11
A Sensor
B Transmitter in housing with IP 54 level of
protection
For instruments in zone 2, the transmitter must be installed in its own housing with a minimum
of IP 54 level of protection.
Ensure that in case of a disturbance the supply voltage cannot exceed 40 % of the normal
voltage.
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22
Explosion-protection zone 2
TTR200
C Transmitter power supply
Safety area
OI/TTR200-EN