WIKA T12 - Handbuch (Seite 30)

GB
3211517.07
07/2010
GB/D
30 WIKA operating instructions temperature transmitter T12
■ nA applications:
An external transient protection of max. 140 % of supply voltage
connected to terminals ⊕ and ⊖ shall be provided by the end user
in the end use application.
Operation in Zone 0:
The temperature transmitter may only be operated in areas that
require apparatus of category 1 when following atmospheric
conditions exist:
Temperature: -20 ... +60 °C
Pressure: 0.8 ... 1.1 bar
Operation in Zone 1 and Zone 2:
According to the temperature class, these transmitters may be used
only in the following ambient temperature ranges:
Permissible ambient temperatures
■ Head mounting version
Model T12.10.xx9
II 3G Ex nL
II 3G Ex nA
II 3G Ex ic
T4 : -40 °C ≤ Ta ≤ + 85 °C
T5 : -40 °C ≤ Ta ≤ + 75 °C
T6 : -40 °C ≤ Ta ≤ + 60 °C
■ Rail mounting version
Model T12.30.xx9
II 3G Ex nL
II 3G Ex nA
II 3G Ex ic
T4 : -20 °C ≤ Ta ≤ + 70 °C
T5 : -20 °C ≤ Ta ≤ + 70 °C
T6 : -20 °C ≤ Ta ≤ + 60 °C
8.3 Safety-technical maximum values
8.3.1 Power supply / 4 ... 20 mA loop
The following safety-relevant maximum values must not be exceeded:
Model T12.x0.xx9
II 3G Ex nL
II 3G Ex nA
II 3G Ex ic
Voltage: U
i
= DC 36 V
8. Notes for mounting and operating in ...